CPT 75571 identifies a noncontrast cardiac CT that measures coronary artery calcium and produces a quantitative coronary calcium score. The code applies when calcium scoring is performed as the standalone service. Coverage and payment depend on the patient’s payer, benefit plan, clinical indication, authorization requirements, documentation, and the other services performed during the same encounter.
Two cardiology practices can run that same scan and collect different amounts. Medicare jurisdiction, Medicare Advantage rules, commercial criteria, screening exclusions, code combinations, and the notice your front desk did or didn’t issue all move that number. A clinically appropriate scan isn’t automatically a covered scan.
This guide walks CPT code 75571 from code definition through coverage, medical necessity, diagnosis selection, modifiers, documentation, reimbursement, denials, and appeals. The goal is catching the problem before a calcium score CT claim reaches the payer.
One O Seven RCM connects payer policy, coding, authorization, claim submission, and denial prevention inside one workflow. Good medical billing services verify benefits, authorization, diagnosis alignment, and code combinations before the claim goes out the door. Before any of that matters, your team has to know exactly what work the code covers.
What does CPT code 75571 describe?
CPT code 75571 describes computed tomography of the heart, performed without contrast, for quantitative evaluation of coronary calcium. The scan detects and measures calcified plaque in the coronary arteries and produces a numerical calcium score. It doesn’t describe contrast coronary CT angiography, coronary lumen imaging, bypass-graft angiography, or cardiac perfusion testing.
75571 CPT code description in plain language
The scanner takes cross-sectional images of the heart, and no iodinated contrast goes in for a calcium-scoring study. Software finds the calcified plaque inside the coronary arteries and quantifies it, then the interpreting provider reports the findings with the score.
That result usually gets expressed as an Agatston score, a number reflecting the amount and density of calcified coronary plaque. The coronary calcium score feeds cardiovascular risk assessment and tells you nothing about whether the plan will pay.
What the service includes
When one entity performs and reads the study, the code represents the whole standalone service: noncontrast acquisition, calcium identification, quantitative analysis, image processing, interpretation, and the formal report. ECG synchronization used in the protocol sits inside that work.
Whether your claim represents the global service, the professional component, or the technical component depends on who owned the equipment and who read the study. Section 9 handles that decision.
What CPT 75571 does not include
The CPT code for CT calcium score covers calcified plaque quantification and nothing past it. Everything in the right column belongs to a different code, a different service, or a different conversation with the payer.
What the code includes and excludes
| Included service element | Not represented by 75571 |
|---|---|
| Cardiac CT without contrast | Contrast coronary CTA |
| Quantitative calcium measurement | Coronary lumen angiography |
| Evaluation of calcified coronary plaque | Full characterization of noncalcified plaque |
| Calcium-score calculation | CT-derived fractional flow reserve |
| Interpretation and report when globally billed | Stress, perfusion, or echocardiographic testing |
Watch the language your team uses in appeals. The code doesn’t detect coronary artery disease. It quantifies coronary calcification that contributes to cardiovascular risk assessment. That second version is narrower, and it survives a payer reading it.
The Society of Cardiovascular Computed Tomography publishes these distinctions on its SCCT cardiac CT codes page. Remember what the code does and doesn’t settle: it identifies the imaging service, and it doesn’t decide which patients get the scan or whether a payer covers it.
When is CPT 75571 clinically appropriate?
Coronary calcium scoring may be clinically appropriate when a clinician needs the score to refine cardiovascular risk assessment and guide a preventive decision that stays uncertain after the initial evaluation. CAC scoring works best as a selective risk-reclassification tool. Clinical usefulness doesn’t establish insurance coverage, which stays subject to the benefit plan and payer policy.
How CAC testing supports risk reclassification
Risk estimation comes first. For a share of patients the number lands in a range where the preventive decision could go either way, and selective scoring adds a data point that can move that patient into a different risk category.
The American Heart Association PREVENT-ASCVD equations replaced the Pooled Cohort Equations for primary-prevention risk assessment in the 2026 dyslipidemia guideline, which supports selective use of a CAC test to help reclassify risk. That selective use applies to men aged at least 40 and women aged at least 45.
What a CAC score can and cannot answer
A CT calcium score test quantifies calcified plaque and gives the clinician a baseline for repeating the study later. The limits matter more for billing.
A coronary calcium score can’t identify every obstructive lesion, measure noncalcified plaque burden, assess blood flow, or substitute for a chest-pain workup. It also can’t tell your biller whether the plan pays. CAC scoring assesses risk. Coverage is a separate determination.
Why clinical appropriateness does not guarantee coverage
Two questions run in parallel, and practices lose claims by collapsing them into one. Clinical appropriateness asks whether the test could help this patient. Payer medical necessity asks whether the documented indication meets that payer’s written criteria.
Clinical guidelines help a clinician decide whether CAC scoring may be useful. Payer policies determine whether a specific plan recognizes that use as covered and medically necessary.
| Clinical value is not the same as coverageA CAC test may be supported by current clinical guidance when additional risk information could change a preventive decision. That support doesn’t require an insurer to cover the service. Coverage still depends on the plan, payer policy, documented indication, authorization, and benefit exclusions. |
Cardiology practices often need specialty medical billing services because somebody has to translate the clinical reason for cardiac imaging into payer-specific authorization and coding.
CPT 75571 vs CPT 75574: what is the difference?
The 75571 code measures coronary calcium without contrast. CPT 75574 evaluates the coronary arteries and bypass grafts with contrast. When calcium scoring happens as part of the same cardiac CT or coronary CTA study described by CPT 75572 through 75574, you don’t report the calcium-scoring code separately.
Cardiac CT code comparison
Four codes sit in this family and only one is coronary CT angiography. Reading the CT calcium score CPT code as interchangeable with the CTA code produces most of the unbundling edits on cardiac imaging claims.
Cardiac CT code comparison
| Factor | CPT 75571 | CPT 75572 | CPT 75573 | CPT 75574 |
|---|---|---|---|---|
| Contrast | No | Yes | Yes | Yes |
| Main purpose | Quantitative coronary-calcium scoring | Cardiac structure and morphology | Congenital cardiac structure and morphology | Coronary CTA |
| Coronary lumen evaluation | No | Not the primary service | Not the primary service | Yes |
| Bypass-graft evaluation | No | No | No | Included when present |
| Calcium scoring | Primary service | Included if performed | Included if performed | Included if performed |
| Code-selection question | Is standalone calcium scoring the ordered service? | Is contrast morphology imaging being performed? | Is the study for congenital heart disease? | Is coronary angiography being performed? |
Don’t let anyone treat CPT 75572 or 75573 as backup coronary CTA codes. The 75574 CPT code specifically represents coronary CT angiography here, and the CPT code 75574 description is where a confused coder should start.
When 75571 is a standalone service
Standalone reporting holds when the order asks for coronary calcium scoring, the technologist performs a noncontrast acquisition, quantitative evaluation gets completed, a report documents the result, and no other code from the same study already includes that work.
A patient scheduled only for a noncontrast coronary calcium scan, with the provider reporting the quantitative score, is the clean case. The CPT code for CT coronary calcium scoring represents the principal imaging service.
Why calcium scoring is not separately reported with the same CTA study
CPT 75572 through 75574 already include quantitative or functional assessment when the radiologist performs it. Adding the CT coronary calcium score CPT code on top creates an unbundling edit, and a modifier won’t fix it.
SCCT’s published SCCT EviCore coding guidance states that the code covers standalone calcium scoring and shouldn’t be reported with CPT 75572 through 75574. Separate reporting takes a distinct service supported by current coding instructions, payer rules, and documentation.
Your coder still checks the NCCI edit and its modifier indicator for the date of service. Correct code selection prevents unbundling errors and says nothing about whether the payer covers standalone calcium scoring.
Does Medicare cover CPT code 75571?
Original Medicare treatment of CPT 75571 has to be verified against the patient’s Medicare Administrative Contractor, the applicable coverage documents, the documented reason for the scan, and the date of service. One current CGS policy covering Kentucky and Ohio treats quantitative calcium scoring as noncovered, and that local policy isn’t a national determination binding every jurisdiction.
Why there is no safe universal yes or no answer
The word Medicare isn’t specific enough to reach a coverage conclusion. Original Medicare, Medicare Advantage, supplemental coverage, and other government programs each behave differently, and your staff needs to know which one they have before opening a policy document.
Original Medicare runs through MAC-administered claim processing. Medicare Advantage coverage is plan-specific, and such a plan needn’t adjudicate the claim the way Original Medicare would. Supplemental coverage won’t convert a noncovered service into a covered benefit.
How MAC and LCD rules affect coverage
Six steps, in order. Confirm whether the patient has Original Medicare or Medicare Advantage. Identify the service location and the MAC that processes it. Search the Medicare Coverage Database. Review any NCD, LCD, and related billing article, confirm document status and effective date, then compare the documented indication against the exact policy language.
CGS LCD L33947 shows what one of those looks like in practice. It took effect October 9, 2025, applies to Jurisdiction 15 in Kentucky and Ohio, and identifies quantitative calcium scoring as noncovered.
How one active MAC policy treats 75571
| Policy element | Verified detail |
|---|---|
| Policy | LCD L33947 |
| Contractor | CGS Administrators |
| Jurisdiction | J15 |
| States | Kentucky and Ohio |
| Current effective date | October 9, 2025 |
| Position on 75571 | Quantitative calcium scoring is noncovered |
Read that table narrowly. CMS LCD L33947 shows how one active MAC policy treats CPT code 75571 inside Jurisdiction 15. It doesn’t prove Medicare denies the service nationally. The associated CMS billing article A56451 carries billing guidance for the same jurisdiction.
Screening versus medical necessity
A calcium scoring test can be clinically useful and still land in the payer’s screening bucket. Those two facts coexist, and appeal writing won’t change it.
A screening exclusion can’t be fixed by picking an inaccurate disease diagnosis. Your coder must not replace an accurate screening indication with a disease diagnosis to chase reimbursement.
Your staff establishes expected coverage and patient liability before the patient is on the table. When noncoverage is expected, the practice determines whether an advance notice is required and whether liability can transfer. Section 9 covers which modifier reports that.
What practices should check before the scan
Six checks, and your scheduler can run all of them before the appointment.
- Coverage type, so you know whether this is Original Medicare or Medicare Advantage
- Jurisdiction, so you know which MAC processes the service
- Active policy, so you know whether a current LCD or article applies
- Indication, so you know whether the record supports screening or risk assessment
- Liability, so you know what notice the patient signs
- Estimate, so the patient hears the number from you first
A consistent eligibility verification and prior authorization workflow catches all six at scheduling. Commercial plans, Medicare Advantage, TRICARE, and state-regulated plans then apply their own criteria on top.
Does commercial insurance cover CPT 75571?
Commercial coverage varies by insurer, employer group, state, plan design, clinical indication, and medical policy. Some plans cover a single coronary calcium scan for defined risk groups. Others classify it as screening and exclude it. Your team verifies the benefit, current criteria, the prior-authorization requirement, and the repeat-testing limit.
Why coverage varies by plan
One national insurer administers many products. A fully insured plan may be subject to state requirements that a self-funded employer plan behind the same logo never touches.
A covered benefit can still require prior authorization, and an approved authorization won’t guarantee payment if the coding is wrong. Whoever takes the benefits call records the representative name, date, time, and reference number. That reference number is the only thing that survives a dispute six months later.
Eight questions belong on that call: whether the code is a covered benefit, whether the indication counts as screening, whether prior authorization is required, what age or risk criteria apply, how repeat scans are limited, whether a specific imaging site is required, what deductible applies, and whether the plan wants records before authorizing.
Aetna as a conditional coverage example
Aetna shows what conditional coverage looks like written down. Under Aetna Clinical Policy Bulletin 0228, last reviewed April 13, 2026, single calcium scoring is medically necessary for asymptomatic people aged 40 or older with diabetes, and for asymptomatic people with an intermediate 10-year cardiac-event risk of 10% to 20% under the risk models the policy names.
Repeat scanning is narrower. Aetna permits it only when the prior CAC result was zero, the prior scan happened at least five years earlier, and finding new calcium would change management.
One point worth flagging to your cardiologists: Aetna’s bulletin still names Framingham Risk Scoring and the Pooled Cohort Equations, while the 2026 AHA guideline recommends PREVENT-ASCVD. Guidelines and payer policies update on separate clocks. Clinicians follow current medical guidance; billing staff follows the payer’s written criteria.
State coverage changes and plan limitations
Maryland HB 666 was approved by the governor as Chapter 684. It requires specified Maryland programs and regulated health plans to cover calcium-score testing per current ACC guidance, for plans issued, delivered, or renewed on or after January 1, 2026. The text sits on the Maryland calcium-score coverage law page.
Read the scope before anyone repeats it to a patient. Maryland’s law reaches specified state-regulated plans and programs, and a self-funded employer plan covering a Maryland patient may sit outside it. Confirm whether this plan is subject to the law.
What each coverage source requires you to verify
| Coverage source | General treatment | What the practice must verify |
|---|---|---|
| Original Medicare | MAC and policy-specific | Jurisdiction, LCD, indication |
| Medicare Advantage | Plan-specific | Benefits, authorization, policy |
| Commercial payer | Policy and product-specific | Benefit, criteria, PA, frequency |
| TRICARE | Conditional under current manual | Beneficiary plan and current criteria |
| State-regulated plan | May be affected by state law | Plan funding type and effective law |
Criteria differ across every row of that table. Each payer still evaluates the same underlying question: whether the documented service meets its definition of medical necessity and falls inside the benefit.
What establishes medical necessity for CPT 75571?
Medical necessity depends on the documented reason for the scan, the patient’s clinical circumstances, how the result is expected to affect care, the payer’s current policy, and completion of any authorization requirement. A diagnosis code can’t establish it alone, and a clinically appropriate service can still be excluded by the benefit plan.
Clinical appropriateness and payer medical necessity are different
Four decisions run underneath every calcium-score claim. They’re connected, they aren’t interchangeable, and a claim can clear three and still deny on the fourth.
Four decisions behind every calcium-score claim
| Decision layer | Question |
|---|---|
| Clinical appropriateness | Could the scan provide useful information for this patient? |
| Payer medical necessity | Does the documented indication meet the payer’s policy? |
| Benefit coverage | Does the patient’s plan include the service? |
| Claim payment | Were authorization, coding, documentation, and submission requirements satisfied? |
A clinically appropriate scan can be contractually excluded. Covered benefits deny for missing authorization. An authorized service denies for coding inconsistency, and a diagnosis sitting in the payer’s own policy still fails when the record doesn’t support it.
Five elements a payer may review
Start with the reason for the scan. The order states why coronary calcium scoring is requested, because a reviewer treats heart check and routine scan as blanks.
Second, patient information. The record may need risk assessment, diabetes, family history, a lipid disorder, a prior CAC result, or the timing of the previous scan.
Third, expected management effect. The record should explain why the result is expected to change the care plan. Dropping that phrase into a template doesn’t buy coverage.
Fourth, payer-policy alignment: the documented facts have to match current criteria, and the Aetna example shows how specific those get. Fifth, administrative completion, covering benefits, authorization, site requirements, frequency limits, notices, and timely filing.
Why a valid ICD-10 code is not a payment guarantee
An ICD-10-CM code identifies the documented condition, symptom, finding, or screening reason. It doesn’t prove the service meets a payer’s medical policy, that the benefit is covered, or that the record supports the claim.
| Medical necessity requires more than a diagnosis codeA diagnosis code doesn’t independently establish medical necessity for a CT calcium scoring test. The order, clinical note, patient factors, expected management effect, payer policy, authorization, and imaging report all have to support it. Payment is still denied when the service is excluded, authorization is missing, or the claim doesn’t match the documentation. |
CMS article A56451 states that the diagnosis must best describe the condition for which the service was performed, and that diagnostic-test reporting uses the result when known, or the prompting symptoms when it isn’t.
Effective revenue cycle management services connect the order, coverage check, authorization, coding, submission, payment, and denial response instead of treating each stage as somebody else’s job. When these denials start at scheduling, fixing the claim afterward is too late.
Which ICD-10-CM codes support CPT 75571?
The correct ICD-10-CM code is the one that most accurately represents the documented reason for the calcium-score scan. Depending on the record, that reason may involve cardiovascular screening, family history, lipid abnormalities, diabetes, a prior abnormal cardiac-imaging finding, or established coronary disease. No diagnosis code guarantees payer coverage or payment.
Diagnosis selection starts with the medical record
Read the ordering provider’s note first. Identify the stated reason for the scan, work out whether this is screening, risk assessment, follow-up, or evaluation of a documented condition, then pick the most specific supported code.
Confirm the order, note, authorization, report, and claim all describe the same thing. Document first, code second, verify coverage third. Reversing that order is how a practice ends up defending a diagnosis the chart never supported.
Check the 2026 ICD-10-CM files against the date of service. CMS publishes separate FY 2026 files for encounters before and after April 1, 2026, so the date drives which file your coder validates against.
Common diagnosis categories for calcium scoring
The table below is a coding framework. Every row still depends on what the record documents.
Diagnosis categories that may appear with a calcium-score claim
| Documented scenario | ICD-10-CM category | Example | Limitation |
|---|---|---|---|
| Cardiovascular screening | Screening encounter | Z13.6 | An accurate screening code may still lead to noncoverage |
| Documented family history | Family history of circulatory disease | Z82.49 | The exact family history must be documented |
| Documented lipid abnormality | Disorders of lipoprotein metabolism | E78 category | Select the most specific documented lipid condition |
| Diabetes used in payer criteria | Diabetes mellitus category | E08 through E13 | Type and complications must be coded accurately |
| Prior abnormal cardiac imaging | Abnormal cardiac imaging finding | R93.1 | Do not use before an abnormal finding exists |
| Known coronary atherosclerosis | Chronic ischemic heart disease | I25 category | Do not assign established disease to obtain coverage |
How to code a previously elevated calcium score
R93.1 may fit when the patient already has a documented abnormal finding on cardiac imaging. It doesn’t belong on an initial screening claim because somebody expects an abnormal result.
A known elevated score supporting follow-up has to appear in the record, and the current reason for repeating the scan has to be documented too. The ICD 10 elevated calcium score question usually turns on that second piece, because a previous abnormal result doesn’t satisfy the repeat-testing policy on its own.
Why a covered diagnosis does not guarantee payment
A claim still denies when the plan excludes the service, the indication misses the policy, prior authorization was never obtained, the provider isn’t enrolled correctly, repeat-testing limits apply, the diagnosis conflicts with the order, or the service was bundled into another procedure.
| No ICD-10-CM code guarantees coverageAn ICD-10-CM code describes the documented condition or reason for the encounter. It doesn’t independently establish benefit coverage, payer medical necessity, authorization, or claim payment. A diagnosis listed in a payer policy is a coverage reference, never an instruction to change the record. |
Which modifiers apply to CPT 75571?
The calcium-scoring code may be billed globally with no component modifier, with Modifier 26 for the professional interpretation, or with Modifier TC for the technical service when different entities perform the components. Medicare noncoverage modifiers GA, GX, GY, and GZ depend on the denial basis and the beneficiary notice. Modifier 59 is not routine here.
Global, professional, and technical component billing
Report the code with no component modifier when one entity supplies the scanner, performs the study, reads it, issues the report, and meets enrollment requirements. Modifier 26 applies when the billing provider reads the images and produces the report without billing the scanner or technologist.
Modifier TC applies when the billing entity owns the equipment, provides the technologist, and performs the acquisition without the separately billed interpretation.
Component billing at a glance
| Billing arrangement | Modifier | Claim meaning |
|---|---|---|
| One entity provides both components | None | Global service |
| Interpretation and report only | 26 | Professional component |
| Equipment and technical performance only | TC | Technical component |
Don’t pick between 26 and TC based on where the scan happened. Confirm which entity owns the equipment, employs the technologist, reads the study, and is enrolled to bill, plus whether an anti-markup rule touches the arrangement.
GA, GX, GY, and GZ for expected Medicare noncoverage
The Advance Beneficiary Notice applies to Original Medicare fee-for-service situations where payment is expected to be denied and liability may move to the beneficiary.
Medicare noncoverage modifiers
| Modifier | General use | Notice status | Main warning |
|---|---|---|---|
| GA | Expected reasonable-and-necessary denial | Required ABN properly issued and on file | Do not use when the basis is a statutory exclusion |
| GX | Voluntary notice for a denial outside medical necessity | Voluntary notice issued | Often paired with another modifier based on the denial reason |
| GY | Statutorily excluded or no Medicare benefit category | ABN generally not required | Do not apply to every locally noncovered service |
| GZ | Expected reasonable-and-necessary denial | No valid ABN on file | Provider generally cannot transfer liability |
One nuance costs practices real money. Don’t reach for GY because somebody called the scan screening. Work out first whether the anticipated denial is a statutory exclusion, a benefit-category issue, a reasonable-and-necessary denial, a local policy denial, or a frequency limitation.
A signed ABN doesn’t automatically make a patient liable. It must be valid, delivered before the service, specific to the expected denial, and paired with correct claim reporting. CMS covers Form CMS-R-131 in its CMS Advance Beneficiary Notice guidance.
When Modifier 59 or an X modifier may apply
Modifier 59 and the XE, XP, XS, and XU set are not routine. Check the NCCI procedure-to-procedure edit for the date of service, confirm the edit permits a modifier, confirm the service was distinct and separately documented, and use the more specific X modifier when one fits.
Never append a modifier because the second code denied. CMS states that NCCI modifiers belong only in appropriate clinical circumstances, and its CMS Medicare NCCI guidance notes that an edit with a modifier indicator of zero can’t be bypassed. Scoring performed inside the same CTA study doesn’t become payable because somebody added a 59.
Other modifiers that require case-specific review
Modifier 52 reports a reduced service, 53 a discontinued procedure, 76 a repeat by the same physician, and 77 a repeat by another. None belong on the claim unless that event happened, the record explains why, and the payer recognizes the modifier here.
| Modifier 91 does not applyModifier 91 identifies a repeat clinical diagnostic laboratory test. A calcium-score scan is a diagnostic imaging procedure, so Modifier 91 should never report a repeated study. Correct modifier selection still depends on documentation showing who performed the service and what the interpreting provider reported. |
What documentation is required to bill CPT 75571?
Documentation should show a valid order, the documented reason for the scan, relevant patient factors, coverage and authorization checks, completion of the noncontrast cardiac CT, quantitative calcium findings, and a signed interpretation. The order, note, authorization, report, diagnosis, component modifier, and claim all have to describe the same service.
The order and clinical note
The ordering record needs patient identity, order date, ordering provider, the requested service, the clinical reason, relevant risk factors, the prior score and its date when repeat testing is requested, plus provider authentication.
Heart scan, preventive imaging, and calcium check are the orders that generate the most avoidable denials. Wording closer to “noncontrast coronary calcium scoring requested to refine documented cardiovascular risk” gives a reviewer something to work with. No template is universally sufficient.
Eligibility and prior authorization evidence
Keep the eligibility response, benefit details, policy version, authorization number and dates, approved code and site, call reference number, patient estimate, and any financial notice you issued.
Prior authorization confirms the payer reviewed a request under its own process. It won’t guarantee payment when coverage, coding, eligibility, or claim data turn out wrong.
Technical performance and final report
The technical record establishes that a noncontrast cardiac CT was performed, with date and location, equipment and protocol, completion status, image adequacy, any repeated acquisition and its reason, and the entity responsible for the technical component.
The final report carries patient and service identifiers, the study performed, confirmation that no contrast was used, quantitative findings and the total score, the interpretation, comparison with any prior study, the interpreting provider, a signature and date, and any limitation affecting the read.
The pre-submission claim review
Run this scrub before the CT calcium score test claim leaves. A medical billing audit finds the recurring gaps between cardiac-imaging orders, authorization records, modifiers, claim data, and final reports.
Claim scrub before submission
- Patient coverage is active
- Payer policy was checked
- Authorization was completed where required
- Rendering and billing providers are enrolled
- Place of service is correct
- Diagnosis matches the record
- CPT code matches the performed service
- The calcium-scoring code is not included in another cardiac CT service
- Modifier 26 or TC matches the billing arrangement
- ABN modifier matches the expected denial basis
- Report is signed
- Claim and documentation are consistent
| Repeated calcium-score denials leave a pattern across orders, authorizations, reports, and remittances. One O Seven RCM audits that pattern before the next claim repeats it.Request a Billing Audit |
How does calcium-score reimbursement work?
The 75571 code has no universal reimbursement amount. Payment varies by payer, contract, geographic locality, place of service, global or component billing, coverage status, and patient benefits. Medicare’s Physician Fee Schedule may show relative values or locality-based payment, and the existence of a fee doesn’t prove a Medicare policy covers the service.
Why there is no single national payment amount
Six terms get used interchangeably in practice meetings and mean different things on a remittance.
What each payment term means
| Term | Meaning |
|---|---|
| Charge | Amount submitted by the provider |
| Contracted rate | Amount negotiated with the payer |
| Allowed amount | Maximum amount recognized under the plan |
| Payer payment | Amount paid after plan rules |
| Patient responsibility | Deductible, coinsurance, or valid noncovered liability |
| Write-off | Amount the provider cannot collect under the contract |
Never quote a reimbursement figure lifted from a competitor site, a national average page, an outdated fee schedule, a different locality or component, or a code-pricing tool nobody checked against coverage.
Global, professional, and technical payment
Global payment covers both components. Modifier 26 produces the professional payment and Modifier TC the technical payment. The global amount generally relates to the combined values, though contracts can adjudicate differently. Your billing entity collects both only when it furnished both and may bill both.
Medicare fee schedule does not equal Medicare coverage
Medicare may assign pricing to a diagnostic service without establishing that every use is covered. Coverage still turns on national or local policy, the indication, the jurisdiction, and the date of service. CMS notes that its CMS Physician Fee Schedule lookup provides pricing, RVUs, and payment-policy information without displaying certain MAC-priced or nonpayable codes.
| A fee schedule amount is not a coverage decisionFinding a payment amount for a calcium score CT tells you what the service would pay if it were covered for that patient, in that jurisdiction, on that date. Answering “does Medicare pay for CT scans” always requires the policy, never the fee schedule. |
How practices identify underpayments
Your payment-posting team compares the submitted charge, contracted allowance, expected component, payer payment, patient responsibility, contractual adjustment, and any remark codes. Structured AR follow-up services determine whether an unpaid balance is a valid noncovered service, a processing error, an underpayment, or an unresolved appeal.
Why do CPT 75571 claims get denied?
Calcium-score claims commonly deny because the payer considers the scan noncovered, medical necessity wasn’t established, prior authorization was missing, the diagnosis didn’t match policy, the service was bundled into another cardiac CT code, documentation was incomplete, or the claim duplicated a prior submission. The right response depends on the actual remittance.
Read the remittance before taking action
Your team reviews the Claim Adjustment Group Code, the Claim Adjustment Reason Code, any Remittance Advice Remark Code, the payer explanation, the patient responsibility assignment, the original claim, the authorization record, the policy version, and the appeal deadline.
CMS explains that CO generally identifies a contractual obligation and PR identifies patient responsibility, with a CARC explaining the adjustment and a RARC adding detail. Don’t decide liability from the CARC alone. Review the group code, the RARC, the contract, and any required notice.
Denial decision matrix
Denial pattern, cause, first review, and action
| Denial pattern | Likely cause | First review | Typical action |
|---|---|---|---|
| Noncovered service | Plan exclusion or screening policy | Benefit and policy | Confirm liability, appeal only if policy was misapplied |
| Medical necessity | Criteria or documentation not met | Order, note, policy | Appeal when the existing record supports criteria |
| Missing authorization | Authorization absent or mismatched | PA record and approved code | Correct if the payer permits, otherwise follow the plan process |
| Bundled service | Scoring included in another CT code | Same-day procedures and NCCI | Correct the combination, do not add 59 without support |
| Diagnosis mismatch | Claim conflicts with record or policy | Order, note, report | Correct only when the coding was inaccurate |
| Missing information | Claim or documentation incomplete | Claim fields and attachments | Submit a corrected claim or the requested records |
| Duplicate claim | Prior claim active or resubmitted wrong | Claim history | Void, replace, or follow the duplicate process |
| Underpayment | Paid below contract or wrong component | Contract and remit | Request adjustment and escalate through AR |
| Timely filing | Claim or appeal submitted late | Submission records | Appeal only when proof supports an exception |
Don’t map one fixed CARC onto each category. Payers use different combinations for the same underlying problem, and the ERA or EOB governs the analysis.
Corrected claim, appeal, patient liability, or write-off
Send a corrected claim when the diagnosis, a modifier, the NPI, or the place of service was wrong, or the payer asked for one. Appeal when the original claim was correct, the record supports the policy, or the payer applied the wrong rule.
Move to patient liability only when the plan validly assigns it, the contract permits billing the patient, any required notice was valid, and the amount matches the adjudication. Write off when the service was excluded with no valid liability, when your practice caused the error, or when timely filing expired.
What a strong appeal package contains
Include an appeal letter tied to the specific denial reason, the original claim, the remittance, the order, the clinical note, the authorization, the imaging report, the payer policy, proof of timely submission, and the resolution you want.
For Original Medicare, a redetermination is the first appeal level, and CMS states the request generally must be filed within 120 days of the initial determination. CMS also notes that minor errors belong in the correction or reopening process. The CMS Medicare redetermination guidance sets out that process, and CMS remittance advice guidance covers the group codes behind it.
How denial data should change the workflow
One denial needs claim resolution. A repeated denial needs root-cause correction. Track denials by payer, code, diagnosis, provider, and cause, then fix the scheduling workflow when the cause starts before billing.
Update report templates only when they’re missing information that identifies the service, never to manufacture medical necessity. Effective denial management services determine whether the claim needs correction, a policy-based appeal, authorization recovery, patient-liability review, or a compliant write-off.
| Not every calcium-score denial should be appealed, and not every noncovered balance belongs to the patient. One O Seven RCM reviews the policy, remittance, authorization, documentation, and claim before picking the recovery path.Review Your Denial Pattern |
CPT 75571 billing FAQs for providers
What is the CPT code for a coronary artery calcium scan?
Code 75571 covers a standalone noncontrast cardiac CT providing quantitative coronary-calcium scoring. It doesn’t describe contrast coronary CT angiography. Confirm that scoring isn’t already included in another cardiac CT service in the same study.
What is the CPT code for a calcium-scoring test?
The CPT for calcium scoring is 75571 when the service is a standalone noncontrast cardiac CT with quantitative coronary-calcium evaluation. The CPT code for calcium scoring test selection changes when the provider performs contrast morphology imaging or CTA.
Does 75571 use contrast?
No. Code 75571 describes a noncontrast cardiac CT. Contrast coronary CTA carries a different code, most commonly 75574 when the coronary arteries and bypass grafts are evaluated.
Can 75571 be billed with 75574?
Don’t report the calcium-scoring code separately when scoring is part of the same coronary CTA study represented by 75574, and don’t add a modifier to bypass the edit. Review the coding instructions, NCCI edit, payer rule, and documentation when the services are separate.
Which ICD-10-CM code should be used?
Select the code that accurately represents the documented reason for the scan. Screening, family history, lipid disease, diabetes, an abnormal prior finding, and established disease are not interchangeable. A policy-listed diagnosis doesn’t guarantee coverage.
Does Medicare cover the calcium-score scan?
Original Medicare treatment depends on the applicable MAC, current coverage documents, the documented indication, and the date of service. Some local policies classify isolated scoring as noncovered screening. Medicare Advantage follows plan-specific procedures, so verify coverage type first.
Which modifiers are commonly used?
Use no component modifier for a global service, Modifier 26 for the professional interpretation, and TC for the technical component. GA, GX, GY, and GZ depend on the anticipated Medicare denial and notice status. Modifier 59 is not routine, and 91 does not apply.
Can a patient be billed when insurance denies the scan?
Patient billing depends on the payer, contract, adjustment group code, benefit terms, and any required notice. A denial doesn’t automatically create patient responsibility. For Original Medicare, a valid ABN may be required first.
How much does One O Seven RCM charge for medical billing?
One O Seven RCM charges 3.0% of collections received from payers for full-service medical billing, connecting eligibility, authorization, coding, claim submission, payment posting, denial management, and AR follow-up in one workflow.
How much does One O Seven RCM charge for credentialing?
One O Seven RCM charges $107 per insurance for provider credentialing. It matters when a cardiologist, imaging facility, or new location can’t bill correctly because enrollment, reassignment, taxonomy, or network participation isn’t finished.
Credentialing sits upstream of every claim here. If a provider or site isn’t enrolled, provider credentialing services close that gap before any coding work matters.
Find the billing error before the next calcium-score claim
One O Seven RCM reviews your payer policies, authorization process, diagnosis alignment, modifiers, documentation, remittances, and denial history, then tells you what’s preventable, what’s recoverable, and which workflow has to change.
For cardiology practices that work runs at 3% of total collections, with no upfront fee and no setup charges, and credentialing at $107 per payer. Cardiac imaging is one of the harder billing environments in outpatient medicine, and the coders handling these claims know the component modifiers, NCCI edits, and imaging authorization rules that generalist billers miss.
| If calcium-score claims keep coming back, start with the audit and work forward from there.Request a Medical Billing Audit | Talk to a Billing Specialist |
