CPT 93923: 2026 Billing, Documentation, Medicare Coverage and Denial Prevention

CPT 93923 reports a complete, bilateral physiologic study of the upper or lower extremity arteries. The study must cover three or more levels, or include a qualifying provocative maneuver, to count as complete. It measures blood flow and pressure through function, not through imaging of the vessel itself, and a routine ABI alone doesn’t meet that bar. Correct billing depends on what the report documents.

This guide covers what the code includes, how it compares with 93922, 93924, 93925, and 93926, when payers treat it as medically necessary, documentation that holds up under audit, and how 2026 reimbursement works. The most common error: billing 93923 when the report only supports a limited study.

Quick answer: what CPT 93923 covers

What Is CPT 93923?

CPT 93923 represents a complete, bilateral physiologic study of the upper or lower extremity arteries. The documented service has to meet the required multilevel or provocative-study scope. An ABI measurement can be one component, but a routine ABI by itself doesn’t support reporting the complete study, and payers check for that distinction on audit.

CPT 93923 in Plain Language

CPT 93923 covers a complete, bilateral physiologic study of the arm or leg arteries. The test evaluates arterial function and blood flow using pressure cuffs, Doppler waveforms, and related measurements. It doesn’t produce anatomic pictures the way duplex ultrasound does. And it isn’t another name for “the ABI test.” ABI can be one measurement inside the study. It isn’t the whole service.

Why “Complete” Matters

“Complete” refers to the scope of what gets documented, not how complex the test felt or what your equipment cost. A study reaches “complete” status when it covers three or more anatomic levels, or when it includes a qualifying provocative maneuver, like post-exercise or reactive-hyperemia measurements. Staff time, appointment length, and the reimbursement you’d prefer don’t factor into code selection. Only the documented scope does.

Is CPT 93923 an ABI Code?

Search results often label 93923 as “the ABI code.” That’s an oversimplification. ABI can be one component of the study, recorded alongside segmental pressures and Doppler waveforms across multiple levels. A routine ABI check by itself, without that fuller multilevel or provocative work, doesn’t reach the complete-study threshold. The documented scope decides the code, not the presence of an ABI number on the chart.

Getting that distinction right matters beyond this one code. One O Seven RCM works with practices on coding, claim submission, documentation review, and denial prevention, and vascular testing is one of the areas where a single misapplied code creates a pattern of denials instead of a one-off.

The AMA CPT code set overview page explains how the AMA develops and maintains the CPT code set. A licensed CPT manual, not a summary page, should be the final word before you submit a claim.

What Must a Complete CPT 93923 Study Include?

A complete study reaches that status through one of two pathways: three or more tested levels, or a qualifying provocative maneuver. Either pathway has to show up in the documentation itself, not in the intent to bill it that way.

Pathway 1: Bilateral Testing at Three or More Levels

The report has to name the specific anatomic levels tested. A note that only says “multilevel study completed” doesn’t meet that bar. For a lower extremity study, levels commonly include the thigh, calf, and ankle; for an upper extremity study, the levels differ. Whatever the protocol, name each level and show measurements taken there.

Pathway 2: A Qualifying Provocative Functional Study

A provocative pathway can also support the complete code. The report needs to name the specific maneuver and record findings before and after it. A note stating “exercise was performed” doesn’t carry enough detail on its own. Formal treadmill stress falls under CPT 93924 instead, as its own protocol, so confirm which one ran before you assume this pathway applies.

Physiologic Testing Components

Several measurement types can appear inside a 93923 study. Which ones apply depends on what the visit called for, not a fixed checklist:

• Segmental systolic pressures
• ABI measurements
• Bidirectional Doppler waveform recording and analysis
• Pulse volume recordings or volume plethysmography
• Transcutaneous oxygen tension measurements, where relevant
• Qualifying functional measurements

Not every listed modality is mandatory in every study. The combination that applies depends on the pathway used for that visit.

What Does Not Establish a Complete Study?

These fall short of the complete-study threshold on their own:

• A routine pressure check
• An ABI number without the required documented study behind it
• Audio-only handheld Doppler with no permanent record
• Missing level identification
• Uninterpreted device output
• A one-to-two-level limited study
• Imaging performed under a duplex code

WPS, the Medicare contractor for several states, defines physiologic studies as functional, nonimaging procedures that can include ABI, blood pressure waveforms, Doppler ultrasound, segmental pressures, and plethysmography. That same policy treats ABI alone, when it isn’t part of a limited or complete bilateral study, and simple audio-only Doppler with no analyzable record, as not separately covered.

Reliable medical billing and coding starts with matching the reported CPT code to what the vascular report documents, not what the visit felt like it should support.

CPT 93923 vs. 93922, 93924, 93925 and 93926

CPT 93922 and CPT 93923 both describe bilateral physiologic arterial studies, but the documented extent separates them: 93922 is the limited study, while 93923 is the complete multilevel or qualifying provocative study. A defined lower-extremity treadmill protocol falls under CPT 93924 instead. And 93925 and 93926 are duplex imaging codes, not physiologic-study alternatives, so they answer a different clinical question. Level count, protocol, and imaging versus physiology decide which code applies, not the equipment used or the specialty billing it.

CPT 93923 vs. CPT 93922

The difference comes down to level count and pathway. CPT 93922 covers one or two tested levels, at rest, without a provocative maneuver, while 93923 requires three or more levels, or a provocative pathway like exercise or reactive hyperemia. Effort, appointment length, and equipment cost don’t move a study from one code to the other. Only the documented scope does. A biller who sees “bilateral” and “multiple pressures” on a report and defaults to 93923 without counting the levels is the most common way this pair gets mixed up. One O Seven RCM’s CPT 93922 billing guide covers the limited-study side of this comparison in more depth.

CPT 93923 vs. CPT 93924

CPT 93924 covers a defined lower-extremity treadmill stress protocol: resting measurements, then a walking test, then post-exercise measurements taken right after. Not every provocative maneuver qualifies as this specific protocol, and 93924 isn’t a bigger version of 93923. It’s a different, protocol-specific study. Look for three data points in the note: a resting measurement, the walking protocol used, and post-exercise numbers taken right after exercise stops. Missing any one of those usually means the visit wasn’t a 93924 candidate, whatever else the report says.

CPT 93923 vs. CPT 93925

CPT 93923 is physiologic and nonimaging. 93925, by contrast, is a complete bilateral lower-extremity arterial duplex study, producing anatomic images alongside flow data. The two tests answer different clinical questions, one about function, one about anatomy. Owning the ultrasound equipment used for either study has no bearing on which code applies, and a practice that runs both tests on the same patient still has to document a separate reason for each one.

CPT 93923 vs. CPT 93926

CPT 93926 covers unilateral or limited lower-extremity arterial duplex imaging. It’s still an imaging study, not a reduced version of the physiologic exam. Don’t confuse a one-sided duplex scan with a smaller physiologic study. They belong to separate code families, and mixing them up on a claim tends to trigger a coding-accuracy denial rather than a medical-necessity one.

Arterial vs. Venous Testing

CPT 93923 evaluates arterial physiology. Venous Doppler studies, like CPT 93965 for physiologic venous testing, fall under a separate code family with its own indications and documentation rules. If a patient needs both arterial and venous evaluation, each gets coded and documented on its own terms. Mixing the two in one report muddies medical necessity for both, and a payer reviewing the claim has to untangle which findings support which service.

Confirm the current code descriptors against the licensed AMA CPT manual before you bill from this table. Code language gets revised, and a summary table is a reference point, not a substitute for the manual.

When Is CPT 93923 Medically Necessary?

Medical necessity for CPT 93923 rests on three things: a treating provider’s order, documented signs or symptoms of reduced blood flow, and a plan to use the results in managing the patient. Meeting the clinical picture for testing doesn’t guarantee payer coverage on its own. Policy details vary by payer and by Medicare jurisdiction.

Clinical Situations That May Support Testing

Situations that may support ordering the test include:

• Exertional claudication
• Ischemic rest pain
• Nonhealing wounds or tissue loss
• Suspected arterial insufficiency
• Abnormal vascular findings paired with relevant symptoms
• A meaningful change in a patient’s vascular status
• Evaluation where the results will change medical or surgical management

None of these guarantees coverage on its own. Coverage runs through the payer’s specific policy and the documentation the encounter generates, not the diagnosis code alone.

Why Symptoms and Management Intent Matter

The ordering provider needs to document the specific problem under evaluation, not a risk factor alone. That test result then has to feed into managing the problem it was ordered for. Diabetes or another risk factor sitting in the chart doesn’t, by itself, establish medical necessity. The connection between symptom, test, and management decision is what a reviewer looks for.

The WPS local coverage policy that applies to this code in its jurisdiction sets a three-part test: signs or symptoms of reduced blood flow have to be present, the results have to be needed for medical or surgical management, and the test can’t duplicate another procedure that’s already planned. All three conditions, together, not any one alone.

Routine Screening vs. Diagnostic Testing

Clinical guidelines can recognize a role for ABI in detecting PAD in at-risk patients. The 2024 ACC/AHA guideline for lower extremity PAD calls resting ABI a Class 1 recommendation for diagnosing PAD once history or exam findings raise suspicion. That’s clinical guidance, not a payment rule, and the two shouldn’t get treated as the same thing. Medicare coverage policy treats asymptomatic screening differently: under the WPS LCD cited above, screening a patient with no signs or symptoms isn’t covered, regardless of what a clinical guideline recommends for risk-based detection.

MAC-Specific Policy Warning

Policy scope: The Medicare LCD cited in this guide, L35761, is a WPS Medicare Administrative Contractor policy covering select states. Its examples and exclusions apply within that contractor’s jurisdiction. Don’t treat them as a universal diagnosis list or a rule for every Medicare jurisdiction and commercial payer. Check the LCD and billing article that apply to your own MAC before you build a coverage assumption into your workflow.

CPT 93923 Documentation Requirements

Good documentation for CPT 93923 does four jobs: it shows why the test was ordered, what got tested, what the machine recorded, and what the interpreting provider concluded. Miss any one of those, and the claim is vulnerable, even when the test itself was appropriate.

Document the Clinical Order and Medical Necessity

The record needs to show:

• The treating provider’s intent to order the test
• The clinical problem being evaluated
• Relevant symptoms and exam findings
• Why the result is needed
• How the result could change management
• The date of the order, or evidence the order existed

Federal regulation requires that diagnostic tests be ordered by the treating provider and that the results feed into managing the patient’s problem. CMS guidance on signature requirements is direct about this: claims get denied when the record lacks evidence of ordering intent, even when a signature is present elsewhere in the chart.

Identify the Exact Testing Scope

Require:

• Upper or lower extremity
• Bilateral status
• Named levels tested
• Measurements recorded at every documented level
• The specific provocative maneuver, where one was used
• Pre-test and post-test results, where applicable

Retain the Physiologic Record

Require:

• Segmental pressure values
• ABI calculations, where performed
• Waveform or PVR records
• Device-generated output
• Technical observations
• A permanent record suitable for review

This is a physiologic study, not an imaging study, so keep “images” out of the documentation checklist. Use “waveforms,” “tracings,” “measurements,” and “permanent test records” instead. The Medicare coverage policy for this code requires a permanent record of the study and its interpretation, with variations from normal documented alongside the measurements that show them.

Include a Signed Interpretation

Require:

• Interpreting provider’s name
• Date
• Findings
• Laterality
• Severity, where the record supports it
• Clinical impression
• Comparison with earlier testing, where relevant
• A recommendation, only when clinically appropriate

Use a Pre-Bill Documentation Checklist

Common Documentation Language That Is Too Vague

These phrases show up often, and none of them hold up under review:

• “ABI completed”
• “Vascular test positive”
• “Multilevel study done”
• “Poor circulation”
• “Abnormal Doppler”
• “PAD screening”
• “See machine report”

Each one needs a specific replacement: which levels, which values, which vessel, and what the interpreting provider concluded. A reviewer reading “multilevel study done” has no way to confirm the study met the three-level threshold. One reading “bilateral segmental pressures at high thigh, above knee, below knee, and ankle; ABI 0.62 right, 0.71 left” can confirm it in seconds.

A medical billing audit can show whether your high-volume vascular studies consistently support the code being billed, before the same documentation gap shows up on the next fifty claims. One O Seven RCM runs full-service billing at 3.0% of payer collections, covering coding review, claim submission, denial management, and AR follow-up under that single rate.

ICD-10-CM Codes and Payer Policy for CPT 93923

Diagnosis coding for CPT 93923 has to trace back to why the test was ordered. Picking a code because it appears on a payer’s covered-diagnosis list, without matching documentation in the chart, doesn’t establish medical necessity. The record has to support the code, not the other way around.

Diagnosis Coding Must Match the Documented Reason

The sequence that holds up on review:

1. Identify the clinical reason for testing
2. Document the sign, symptom, condition, or follow-up purpose behind it
3. Select the most specific ICD-10-CM code the record supports
4. Check the applicable payer’s policy
5. Confirm the code supports the specific service and date billed

Diagnosis Categories Commonly Reviewed

These categories come up often in claims for this code, though none of them guarantees coverage by itself:

• Atherosclerosis of native extremity arteries
• Peripheral vascular disease
• Claudication
• Rest pain
• Nonpressure chronic ulcers
• Gangrene
• Arterial stenosis or occlusion
• Post-intervention or surveillance situations where policy supports testing
• Relevant symptoms combined with exam findings

Why an ICD-10 Code Is Not Automatic Coverage

Clinical relevance and payer coverage are two different things. One MAC or one plan might cover a diagnosis that another excludes. The billed diagnosis has to be supported somewhere in the patient’s record, not chosen because it appears on a covered list with nothing behind it in the note. And a screening code doesn’t belong on this claim unless the payer explicitly allows it for this service.

How to Verify a Medicare Diagnosis List

The process:

1. Identify the patient’s Medicare jurisdiction
2. Locate the active LCD for that jurisdiction
3. Open the linked billing and coding article
4. Check the revision date
5. Review the supported-diagnosis table in that article
6. Confirm documentation and frequency rules
7. Save a record of the policy version used, for high-risk claims

The CMS billing and coding article tied to LCD L35761 carries its own revision history, and its supported-diagnosis table applies inside that contractor’s jurisdiction, not nationwide. Confirm the current ICD-10-CM files before you build a diagnosis list into a template.

CPT 93923 Reimbursement in 2026

CPT 93923 doesn’t have one fixed national payment. Medicare’s amount depends on locality, facility versus nonfacility setting, and whether the claim reflects a global, professional, or technical service. Commercial payers set their own contracted rates on top of that. Any number you see online is an estimate until you check the current fee schedule for your specific claim.

Why CPT 93923 Does Not Have One Universal Payment

Several variables move the payment amount:

• Medicare payment varies by locality
• Facility and nonfacility calculations differ
• Professional and technical components affect the total
• Qualifying APM participant (QP) and non-QP conversion factors differ in 2026
• Commercial payer contracts don’t mirror Medicare rates
• Any published national amount should be treated as an estimate, not a guarantee

2026 Medicare Payment Snapshot

CMS released RVU26C, the July 2026 Physician Fee Schedule update, effective July 1, 2026 and updated June 30, 2026. The 2026 conversion factor is $33.5675 for qualifying APM participants and $33.4009 for everyone else, both an increase from 2025. CMS also finalized a 2.5% efficiency adjustment to the work RVUs of most non-time-based codes for 2026, which factors into the calculation for a code like this one.

Don’t publish a specific dollar amount for this code from memory or from a secondhand source. Pull the work RVU, practice expense RVU, and malpractice RVU from the current file, apply the correct locality and conversion factor, and calculate the number for your own setting.

How Providers Should Verify the Current Amount

Five steps:

1. Open the current CMS Physician Fee Schedule lookup tool
2. Select the correct year and quarter
3. Search CPT 93923
4. Choose the applicable locality
5. Confirm facility, nonfacility, and component status before you rely on the figure

Commercial Payer Reimbursement

Medicare’s number is a reference point, not what a commercial plan pays. Check the contracted fee schedule for each payer, confirm authorization and medical policy separately from the payment amount, and compare the allowed amount against the contract terms on every remittance. Track underpayments by payer and location instead of assuming one commercial average applies across your whole book of business. Internet averages for this code aren’t reliable enough to bill from.

Comparing payer allowed amounts against contracted fee schedules, and flagging recurring underpayments, matters more than chasing a single published national estimate.

CPT 93923 Modifiers, Bilateral Status and Units

Modifier and unit selection depends on who performed the technical work, who interpreted the study, whether the documented service was bilateral, and whether upper and lower extremities were evaluated separately. Verify the current AMA instructions, the code-specific Physician Fee Schedule indicators, and the payer’s policy before you build the claim line. This section stays informational; payers don’t all handle these claims the same way.

Global, Professional and Technical Billing

Three billing arrangements are possible:

Global service. The same eligible entity performs the technical study and the professional interpretation. The claim goes out without a component modifier when the current fee-schedule record permits global billing.

Professional component. The billing provider reports the interpretation only. Modifier 26 may apply where the code-specific fee schedule record recognizes a professional component.

Technical component. The billing entity reports the equipment, technical staff time, and related technical expense. Modifier TC may apply where the fee schedule record recognizes a technical component for this code.

Don’t default to “always append modifier 26 when a physician reads the study.” Check the current code-specific Physician Fee Schedule record to confirm whether modifier 26 or TC applies before you submit.

Bilateral Status and Modifier 50

CPT 93923 is already defined as a bilateral study. Don’t add modifier 50 because both sides were tested; the code descriptor already covers that. A bilateral modifier shouldn’t get added automatically because the word “bilateral” shows up in the operative note. Confirm the current AMA instructions and the payer’s code-specific billing edit before you attach it, and don’t assume modifier 50 always triggers a denial either, because that outcome varies by payer and claim logic.

How Should a Unilateral Study Be Reported?

Treat this as a verification workflow, not a settled answer. Older public articles recommend reporting 93923 with modifier 52 for a unilateral study, and that instruction may still be correct, but it needs to be checked against the licensed 2026 CPT manual and the payer’s current modifier policy before it goes into a claim template. Confirm:

1. Why only one limb was studied
2. Whether the service was limited, multilevel, or provocative
3. What the current licensed CPT instructions say
4. The payer’s modifier policy for this exact scenario
5. Whether the code, reduced-service modifier, and payment adjustment line up
6. That the clinical reason for the unilateral service is documented

Upper and Lower Extremity Studies on the Same Date

Upper and lower extremity studies are different body regions. The record needs to separately identify the clinical indication, tested region, measurements, findings, and interpretation for each complete study. Don’t assume a quantity of two gets accepted by every payer; check the current MUE, claim-line instructions, and payer policy. Where separate reporting is supported, each service may need its own claim detail line.

2026 reimbursement details covers how component status and payment interact.

Can CPT 93923 Be Billed With Duplex Studies on the Same Date?

CPT 93923 and an arterial duplex study don’t automatically belong on the same claim because both tests happened to be scheduled that day. Separate reporting can be supportable when the two services answer different clinical questions, the current NCCI edit allows an associated modifier, the payer’s medical policy is met, and the record explains why both studies were necessary on that date.

Check the Current NCCI Edit Pair First

The process:

1. Identify every code reported for that date of service
2. Open the current-quarter practitioner or hospital outpatient PTP file
3. Find the code pair in both column orders
4. Review the modifier indicator
5. Determine whether the services were clinically distinct
6. Verify payer-specific edits, since commercial plans don’t always mirror Medicare edits

CMS applies a standard rule to procedure-to-procedure edits: when both codes in an edit pair get reported for the same beneficiary on the same date, the Column Two code is denied unless a clinically appropriate, NCCI-associated modifier is allowed and reported. The Q3 2026 files took effect July 1, 2026. A modifier indicator that allows an override doesn’t prove the override is medically or factually correct for this claim.

Modifier 59 or XS Is Not an Automatic Override

Modifier 59 and the subset modifiers, like XS, communicate distinct services under defined circumstances. They shouldn’t get added because a claim scrubber flagged an edit. Documentation has to establish a separate diagnostic purpose: the payer may ask for the report, the physician order, the abnormal findings, or the clinical decision pathway behind it. Place the modifier on the code the edit and payer instruction call for, not on whichever code is easier to flag.

Don’t write “add modifier 59 to 93925 whenever both tests are performed” into a coding policy. That instruction is too broad to be safe.

When Same-Encounter Reporting May Be Supportable

The WPS coverage policy for this code allows duplex scanning and physiologic studies to be reimbursed during the same encounter when the physiologic study is abnormal, or when the visit is evaluating vascular trauma, a thromboembolic event, or aneurysmal disease. That’s a WPS policy example specific to its jurisdiction, not a national guarantee of payment.

A pathway that may hold up:

• The physiologic study has a documented clinical indication
• Results come back abnormal or inconclusive
• The provider determines an anatomic duplex study is needed
• The duplex answers a separate clinical question
• The order, both reports, timing, and clinical decision are all retained
• The current edit and payer policy allow separate reporting

A pathway that’s high risk:

• Both tests are ordered as a standing protocol
• The record doesn’t explain separate purposes for each
• No abnormal finding or other documented indication supports the second test
• A modifier gets added only to get past the edit

Verify Units Against the Current MUE

An MUE isn’t a general coverage rule. It represents the maximum units reported on most correctly submitted claims for the same code, provider, beneficiary, and date. Not every code has a published MUE, and some values stay confidential. The Q3 2026 files took effect July 1, 2026. Pull the 93923 MUE and its adjudication indicator from the current file before you publish a specific unit limit anywhere.

Common denial scenarios walks through what happens when this gets billed wrong.

Common CPT 93923 Denials and How to Appeal Them

CPT 93923 denials usually trace back to code selection, missing claim information, medical necessity, authorization, benefit coverage, units, or a same-day procedure edit. Read the complete remittance advice, including the group code, CARC, RARC, policy identifier, and claim-line detail, before deciding whether to correct, resubmit, reopen, or appeal. Not every denial calls for the same response.

Read the Complete Remittance Before Changing the Claim

The billing team should capture:

• Payer and product
• Claim number and date of service
• Claim line affected
• Group code, CARC, and RARC
• Adjustment amount
• Policy reference cited
• Appeal deadline
• Whether the denial is line-level or claim-level
• Whether the payer requested records

Don’t correct a modifier, diagnosis, or unit based on the CARC description alone. Read the RARC and the payer policy it points to first.

Potential Denial Patterns to Investigate

These are investigation pathways, not guaranteed outcomes for this specific code. X12, the code-set maintainer, defines CARC 16 as missing information or a submission error, CARC 50 as a medical-necessity determination, CARC 97 as payment included in another service, CARC 197 as missing precertification or authorization, and CARC 204 as a benefit-plan exclusion.

Don’t write “CPT 93923 gets denied with CARC 50 when documentation is missing” into a training document. CARC 50 relates to the payer’s medical-necessity determination specifically; missing information gets communicated through a different CARC and RARC combination.

Corrected Claim, Reopening, or Appeal?

Corrected claim. Use it when the original claim had a data or coding error: a missing or incorrect modifier, wrong units, a missing required field. The corrected submission should reflect the service the record supports, nothing more.

Reopening or reconsideration. Use it when the payer permits an administrative correction, records weren’t received or associated correctly, or a clerical issue can get resolved without a formal appeal.

Formal appeal. Use it when the original claim was accurate, medical necessity is documented, the code reflects the service performed, authorization or an exception is supported, the payer applied an edit or policy incorrectly, and the appeal deadline is still open.

Don’t alter clinical documentation after the fact to manufacture coverage that wasn’t there at the time of service.

Build the Appeal Packet Around the Denial Reason

Include:

1. A concise appeal letter tied to the payer’s stated reason
2. The original physician order
3. The relevant progress note
4. Signs, symptoms, and exam findings
5. The complete test report, with named levels and bilateral measurements
6. Waveforms, PVR tracings, or the physiologic records that apply
7. The signed interpretation
8. The current payer policy or MAC article
9. Authorization evidence, where applicable
10. The same-day diagnostic sequence, where relevant
11. Proof of timely filing

Don’t bury the decisive fact inside an unindexed medical record. Put it on the first page of the packet.

Prevent the Next Denial

Root causes worth tracking:

• Eligibility not checked
• Authorization requirement missed
• Diagnosis doesn’t match the record
• Complete study not supported by the documentation
• A limited study coded as complete
• Wrong component modifier
• Same-day edit not reviewed before submission
• Unit limit not checked
• Test report unavailable at time of billing
• Appeal deadline missed

When medical necessity appeals turn into a repeating pattern across the same payer, code pair, or documentation gap, that usually points to a workflow problem, not a one-off mistake. Claims that stay unpaid after correction or appeal need to move into a structured AR follow-up workflow, with payer-specific escalation and deadline tracking, rather than sitting in a queue nobody owns.

An RCM Workflow for Cleaner CPT 93923 Claims

A clean vascular-testing claim starts before the appointment. The revenue cycle needs to confirm coverage and authorization, validate the clinical indication, match the code to the documented study, check component and same-day edits, and route denial trends back to the teams responsible for scheduling, documentation, and coding.

Step 1: Verify the Patient and Payer Before the Study

Confirm active coverage, product and network, place of service, benefit status, any prior authorization or notification requirement, referral requirements, site-of-service limitations, member-specific policy, authorization validity dates, and the approved service and rendering provider. Not every payer requires authorization for this service; check the specific plan rather than assuming either way. This is the kind of pre-service payer verification work that keeps a clean study from turning into an unpaid claim.

Step 2: Validate Clinical and Documentation Readiness

Before performing or billing, confirm the order, confirm the clinical indication, determine limited versus complete scope, check whether the planned study is physiologic or duplex, make sure the report template captures bilateral data and named levels, confirm who will interpret the study, and confirm permanent test records can be retained. This checkpoint stops staff from patching missing technical elements after the test is already done.

Step 3: Run a Code and Claim Edit Review

The review should test CPT selection, diagnosis specificity, component status, units, bilateral reporting, the unilateral scenario if it applies, current PTP edits, current MUE, authorization number, ordering and rendering identifiers, place of service, and payer-specific rules. A claim scrubber catches a lot of this. It doesn’t catch all of it, and high-risk cases still need a coder’s eyes on them.

Step 4: Match the Payment to the Contract

After adjudication, post the allowed amount, compare it against the payer contract, validate component payment, check deductible, coinsurance, and contractual adjustments, identify underpayments, route denials by root cause, track appeal deadlines, and move unresolved balances into AR workqueues.

Step 5: Return Denial Intelligence Upstream

Monthly reporting should surface denials by payer, denials by code pair, medical-necessity failures, authorization failures, missing-report failures, modifier and unit edits, average days to resolution, appeal outcomes, and repeated clinical-template gaps. Closing this loop is what separates billing from a revenue cycle: findings from denials should change what happens at the front desk and in the exam room, not stay in a monthly report nobody opens again.

One O Seven RCM Pricing

The billing rate applies to payer collections, with no upfront fee and no setup charge attached to it. Provider credentialing is billed separately at $107 per insurance, and it doesn’t apply to every practice billing this code; it becomes relevant when a provider or facility needs payer enrollment, network participation, or reassignment.

Vascular and physiologic testing like CPT 93923 comes up often in cardiology and vascular practices, and a flat rate with no upfront fee and no setup charge is a straightforward structure for a group running a high volume of these studies. Among full-service RCM partners, 3.0% of collections with nothing added on is one of the more affordable structures available, backed by a team that already works with vascular-specific codes like this one instead of treating every claim as generic.

One O Seven RCM can review where eligibility, authorization, coding, claim edits, denials, or AR follow-up is breaking down in the vascular-testing revenue cycle, then connect those stages into one accountable end-to-end RCM support workflow.

Frequently Asked Questions About CPT 93923

What Is CPT Code 93923?

CPT code 93923 reports a complete, bilateral, noninvasive physiologic study of the upper or lower extremity arteries. The study has to cover three or more anatomic levels, or include a qualifying provocative maneuver, to meet the “complete” threshold. It’s a functional test, not an imaging study.

What Is the Difference Between CPT 93922 and 93923?

CPT 93922 is the limited bilateral physiologic study, covering one or two tested levels at rest. 93923 is the complete study: three or more levels, or a qualifying provocative pathway. The documented scope in the report, not the time spent or the equipment used, decides which code applies.

Is 93923 the ABI CPT Code?

Not automatically. ABI can be one component of the study, but a routine ABI check by itself doesn’t meet the multilevel or provocative threshold that 93923 requires. Calling every ABI test “93923” is a common oversimplification tied to this code, and it’s one driver behind vascular claims getting denied for undercoded scope.

What Is the CPT Code for an ABI Test?

There isn’t one universal answer. The code depends on the complete documented study: a limited bilateral physiologic study and a complete multilevel study don’t share a code, and ABI alone may not be separately reportable under some payer policies. Compare 93922, 93923, and 93924 against what the report documents before you pick one.

Is CPT 93923 Covered by Medicare?

Coverage depends on medical necessity, the applicable MAC policy, and documentation, not on the code alone. Don’t treat any single MAC’s rules, including the WPS policy cited in this guide, as a national standard. Routine, asymptomatic screening isn’t covered under that policy. Check the patient’s Medicare jurisdiction and the active local coverage policy before billing.

Does CPT 93923 Require Prior Authorization?

There’s no single answer across every payer and product. Traditional Medicare, Medicare Advantage, Medicaid, and commercial plans can differ on this. Verify the member-level requirement before the service, and keep the authorization number and approved scope on file.

Which Modifiers Apply to CPT 93923?

Modifier 26 or TC may apply when the service splits into professional and technical components and the current fee schedule permits it. Don’t automatically append modifier 50; the code already describes a bilateral study. Unilateral reporting needs to be checked against the licensed 2026 CPT guidance before you bill it that way, since payer rules can differ from the general CPT instruction.

Can CPT 93923 and 93925 Be Billed on the Same Day?

Not automatically, because both tests happened to be performed the same day. Check the current PTP edit, the modifier indicator, payer policy, and whether the record shows a distinct diagnostic purpose for each test. Some MACs permit separate reimbursement under documented circumstances, like an abnormal physiologic result leading to a duplex study. A modifier doesn’t guarantee payment either way.

What Documentation Supports CPT 93923?

The order and clinical indication, bilateral scope, named levels or the provocative maneuver used, measurements and waveforms, a signed interpretation, a permanent record, and a clear management purpose. Missing any one of these creates real audit exposure, even when the clinical work itself was appropriate.

How Much Does CPT 93923 Reimburse in 2026?

Payment varies by locality and site of service. Professional, technical, and global billing status all affect the amount, and QP versus non-QP conversion factors can differ. Pull the current figure from the July 2026 CMS file and the Physician Fee Schedule lookup tool rather than relying on a number you saw somewhere else. Commercial rates depend on your specific contract, not on the Medicare number.

Build a Defensible CPT 93923 Billing Workflow

Billing CPT 93923 correctly comes down to five checks: confirm the performed study meets the code’s documented scope, establish medical necessity under the applicable payer policy, keep the order, measurements, permanent records, and interpretation on file, verify modifiers, units, component status, NCCI edits, and authorization, and use denial findings to fix the upstream process instead of re-fighting the same claim every month.

One O Seven RCM connects that process instead of handling claim submission in isolation: eligibility, coding, claim edits, denial management, and AR follow-up under one team that already works with vascular-specific codes like this one.

For cardiology and vascular practices running a steady volume of physiologic and duplex studies, that kind of oversight adds up. One O Seven RCM works with cardiology groups on this kind of testing, with full-service billing at 3.0% of collections, no upfront fee, and no setup charge, plus credentialing at $107 per insurance for practices that need payer enrollment support. Practices that want a clearer look at where vascular-testing revenue is slipping can start with a focused complete RCM support review.