CPT Code 70450: CT Head Without Contrast Billing, Modifiers and 2026 Reimbursement

Quick Answer

CPT code 70450 reports a computed tomography scan of the head or brain performed without contrast material. The American Medical Association maintains that descriptor inside the diagnostic radiology range 70010 to 70559.

Contrast status picks the code, and the technique section of the radiology report is what settles contrast status. With intravenous contrast, the study becomes 70460. With both phases in one session, 70470.

Three things changed for CPT code 70450 in 2026. CMS applied an efficiency adjustment that moved the work RVU. Medicare now runs two conversion factors instead of one. A new add-on code, 70472, attaches to 70450 for cerebral perfusion.

Key Takeaways for Billing CPT Code 70450

• Contrast status decides the code, and only the technique section of the report establishes it.
• Modifier 26 covers interpretation, modifier TC covers the technical work, and neither belongs on a global claim.
• CMS Article A57215 retired on October 23, 2025 and applied to Noridian Jurisdiction F alone.
• The AUC program has been paused since January 1, 2024, so AUC modifiers no longer belong on Medicare claims.
• New add-on code 70472 reports CT cerebral perfusion performed with 70450 in the same session.
• CY 2026 carries two conversion factors, and qualifying APM participation decides which one applies.

What Is CPT Code 70450?

The Official AMA Descriptor and What Each Term Means

CPT code 70450 is the code for a computed tomography scan of the head or brain performed without contrast material. The full descriptor, as maintained by the American Medical Association, reads: Computed tomography, head or brain; without contrast material.

Three terms in that descriptor carry the weight, and all three have to be true before you report the code.

Computed tomography rules out MRI and plain film. Head or brain rules out the neighboring anatomy, since orbit, sinus, and maxillofacial studies each carry their own codes. Without contrast material means no iodinated contrast went in through an IV at any point in the session.

CMS publishes a short descriptor for the same code: CT head/brain w/o dye. That version shows up on remittance advice and in fee schedule lookups, where the long descriptor doesn’t fit the field.

70450 is a CT code, and it gets confused with MRI often enough to be worth clearing up. Magnetic resonance imaging of the brain belongs to the 70551, 70552, and 70553 family. None of those codes cross over to CT, and a claim that mixes them denies on the first pass.

CPT 70450 vs 70460 vs 70470: Choosing the Right Head CT Code

CPT code 70450 covers head CT without contrast, while 70460 covers head CT with contrast and 70470 covers both phases performed in a single session.

The Technique Section Decides the Code

CPT code 70450 is confirmed by the technique section of the radiology report, which is the only document that records whether contrast went in. Read it before you pick the code.

The order tells you what the physician wanted. The indication tells you why. The technique section records what the team performed, and that’s what the payer adjudicates against.

Billing 70460 or 70470 for a study that never received contrast is upcoding. Billing 70450 after contrast went in is undercoding. Auditors pull both directions, and a pattern of either one invites a broader record request.

Two situations catch coders out. Contrast ordered and never administered still reports as 70450, because the code follows what the team performed. Under CPT radiology guidelines, oral or rectal contrast doesn’t make a study a with-contrast exam. A patient who drank contrast without an IV injection still gets 70450.

The same without-then-with logic runs through other modalities. Our cardiac MRI contrast sequencing guide walks the identical decision on a different code family.

Head CT Code Comparison Table

Report 70470 by itself when both phases run in one session. Splitting a two-phase study into 70450 plus 70460 produces an NCCI denial, and the remedy is a corrected claim rather than an appeal.

When Is CPT Code 70450 the Right Code to Report?

CPT code 70450 applies when a provider performs a head or brain CT without intravenous contrast to evaluate acute neurological symptoms or trauma.

Documented Indications for Non-Contrast Head CT

• Head trauma with loss of consciousness, amnesia, or a focal neurologic deficit
• Suspected acute ischemic stroke or transient ischemic attack
• Sudden severe headache carrying red-flag features
• Suspected intracranial or subarachnoid hemorrhage
• Altered mental status after a fall
• Seizure evaluation
• Suspected hydrocephalus or shunt malfunction

Why Radiologists Choose Non-Contrast for Acute Bleeding

Fresh blood shows up hyperdense on an unenhanced scan, and contrast can wash that finding out. Radiologists order the non-contrast study first in a suspected bleed for that reason, which is why 70450 dominates emergency department imaging volume.

Contrast is off the table for some patients. Renal insufficiency, a documented contrast allergy without premedication, and hemodynamic instability that demands a fast scan each leave 70450 as the only head CT code available.

You lose more of these claims to ordering language than to coding errors. Phrases like rule out pathology and headache evaluation tell a reviewer nothing about risk. Give them the mechanism of injury. The GCS score belongs in there too when the chart carries one. Add symptom onset timing and anticoagulant status.

Those four details turn a symptom code into a defensible claim, and your referring offices can supply all of them at order entry if the template asks.

Weak ordering language usually comes from the order template rather than the physician. If your referring offices keep sending orders that read rule out pathology, fixing the template upstream beats appealing the denial downstream. That’s the kind of build our medical necessity denial appeals team sets up during onboarding.

What Modifier Is Used With CPT Code 70450?

CPT code 70450 takes modifier 26 when a physician bills interpretation alone, modifier TC when a facility bills the technical work, and no modifier when one entity owns both.

Modifier 26: Professional Component

Modifier 26 on CPT code 70450 covers the professional component: reviewing the images, applying clinical judgment, correlating findings against the history, and producing a signed report for the permanent record.

Append it when the interpreting physician neither owns the scanner nor employs the technologist. A hospital emergency department orders the scan, the hospital bills the equipment and technologist time, and the independent radiology group bills 70450-26 for the read.

Modifier TC: Technical Component

Modifier TC on 70450 covers the technical component: the scanner, the technologist’s time, the room, and the supplies. The facility bills 70450-TC against the same study the radiology group reads.

Global Billing With No Modifier

Global billing of 70450 applies when one entity owns the scanner and employs the reading radiologist. That entity reports the code with no modifier and collects both components on a single line.

Putting 26 and TC on the same claim line rebuilds the global service, and the payer reads it as duplicate billing. Check the PC/TC indicator in the current-year fee schedule before you append anything. Indicator 1 codes accept both modifiers. Other indicators don’t, and the edit fires the same way every time.

Our Modifier 26 billing guide covers all six PC/TC indicators and the payer-specific rules that sit on top of them.

Modifier 26 and TC Decision Table

Which Other Modifiers Apply to CPT 70450?

CPT 70450 can also require modifier CT for non-compliant equipment, modifier 59 or an X modifier for distinct services, and modifier 76 or 77 for repeat imaging.

Modifier CT and Non-Compliant Scanner Equipment

Modifier CT applies to 70450 when the study runs on scanner equipment that doesn’t meet the NEMA XR-29 standard. The Medicare Claims Processing Manual lists codes 70450 through 70498 among the applicable CT services, so this code sits inside the range.

The payment reduction started at 5% in 2016 and moved to 15% for CY 2017 and the years after. It hits the technical component, including the technical portion of a global fee. CMS documents the applicable code range and the reduction in its CMS imaging update.

Your imaging operation needs a reliable way to flag which scanners meet the standard. Miss the modifier when the rule requires it and you have a compliance exposure. Append it when the rule doesn’t apply and you hand back 15% of the technical payment for nothing.

Modifier 59 and the X Modifiers for Distinct Services

Modifier 59 on 70450 marks a distinct service performed on the same date as another procedure. Using it to push a bundled pair through creates false claims exposure, and payers audit for the pattern across a provider’s whole book.

The X subset carries more specificity than a bare 59. XE for a separate encounter holds up better under review, because it tells the payer which exception you’re claiming instead of leaving them to guess.

Modifiers 76 and 77 for Repeat Imaging

Modifier 76 applies to a repeat 70450 performed by the same physician, and modifier 77 applies when a different physician performs the second study. Both need a new clinical question documented in the record.

Documenting the repeat as follow-up gives the payer one study billed twice, which is how these claims turn into duplicate denials that nobody appeals.

How Much Does Medicare Pay for CPT Code 70450 in 2026?

CPT code 70450 pays under the Medicare Physician Fee Schedule for professional claims and under the Outpatient Prospective Payment System for hospital outpatient departments.

The Two 2026 Conversion Factors

CPT code 70450 now pays against one of two conversion factors, because CMS finalized separate rates for CY 2026 in the CMS 2026 fee schedule rule. Qualifying APM participants get $33.5675. Everyone else gets $33.4009.

Both figures sit above the CY 2025 conversion factor of $32.3465. The gap between the two 2026 rates runs a little over half a percent, which sounds small until you multiply it across the volume a busy emergency department or imaging center puts through this code every month.

Confirm which factor applies to your group before you model anything. APM participation status decides it, and that status can change between performance years.

What the Efficiency Adjustment Did to the Work RVU

CMS finalized an efficiency adjustment in the CY 2026 rule that cuts work RVUs and the matching intraservice time by 2.5% across most non-time-based services. Diagnostic imaging sits inside that group.

Time-based codes, codes on the telehealth list, and codes new for CY 2026 stay exempt. CMS also set the adjustment to repeat every three years, so budget for it as a recurring reduction rather than a one-time reset.

Payment by Component: Global, 26 and TC

CPT code 70450 pays three ways depending on who bills it. Global captures both components. Modifier 26 pays the professional share. Modifier TC pays the technical share, and the technical side carries the larger portion on a CT study.

Pull the current work, practice expense, and malpractice RVUs for 70450 from the CMS Physician Fee Schedule Relative Value File. Multiply the total by the conversion factor matching your APM status, then apply your locality’s geographic practice cost indices.

Dollar figures circulating online for this code disagree with each other by roughly double, and none of them cite a source. Run the arithmetic against the file yourself. It takes 10 minutes and it settles the question for your locality rather than a national average.

Commercial Payer Rates and Multiple Procedure Reduction

Commercial contracts vary too much for a national figure to carry meaning. Reconciliation is the control that works. Pull the allowed amount from remittance advice, compare it against your contracted rate, and repeat that across your top payers every quarter.

70450 also appears on the CMS list of diagnostic imaging services subject to the Multiple Procedure Payment Reduction. Run several imaging services on the same date and MPPR cuts the technical component of the lower-valued code. Place of service coding changes the arithmetic again, which the next section covers.

Underpayments on a high-volume imaging code compound without anyone noticing. A quarterly reconciliation across your top five payers tends to surface money the practice already earned, and that’s the first thing our radiology billing specialists check in a free billing audit.

Does Place of Service Change CPT 70450 Reimbursement?

CPT 70450 pays differently by setting, because facility and non-facility practice expense RVUs differ and hospital outpatient technical work falls under OPPS.

Facility and Non-Facility Practice Expense

Non-facility rates apply to 70450 in a physician office or a freestanding imaging center, where the practice carries the overhead. Facility rates apply in a hospital or ASC, where the facility collects separately for that overhead.

CMS changed the math for 2026. In the facility setting, the portion of indirect practice expense allocated per work RVU dropped to 50% of the non-facility amount. Hospital-based radiology groups billing professional components absorb that change on every claim they submit.

Emergency Department and Hospital Outpatient Claims

Professional component claims for 70450 from facility settings carry POS 21, 22, or 23. Bill a non-facility rate for a study performed inside a hospital and you’ve created an overpayment that surfaces in a later audit.

A freestanding imaging center that owns the scanner and employs the radiologist bills globally with no modifier. That posture differs from a physician billing 70450-26 in POS 11, and confusing the two produces denials from both directions.

Which LCD Covers CPT Code 70450?

CPT code 70450 has no single national coverage policy, because each MAC sets Medicare coverage for head CT through its own LCDs and billing articles.

Why Head CT Has No Single National Coverage Policy

Coverage starts at NCD 220.1, Computerized Tomography. Below that, each Medicare Administrative Contractor publishes its own Local Coverage Determinations and companion billing and coding articles.

A biller in Texas and a biller in Oregon work from different documents for the same code. L34417 and L37373 both include 70450, and they belong to different contractors with different covered-diagnosis lists.

CMS Article A57215 Retired on October 23, 2025

CMS Article A57215, Billing and Coding: MRI and CT Scans of the Head and Neck, retired on October 23, 2025. The CMS retirement record carries that date on the article page itself.

The article held an original effective date of October 1, 2019 and applied to Noridian Healthcare Solutions Jurisdiction F: Alaska, Idaho, Oregon, Washington, Arizona, Montana, North Dakota, South Dakota, Utah, and Wyoming.

Practices outside those 10 states were never covered by it. No practice is covered by it today. The active Noridian article is A57204, and publishers this year still name the retired article as the governing document for 70450 nationwide.

Check the article your billing team references before you build a coverage argument on it. We ran into the same problem on cardiac testing, where L38396 replaced a retired article, and the retired LCD article handling section of that guide walks the lookup.

How to Find the Article That Applies to Your Jurisdiction

The A57215 covered-diagnosis list ran to 6,435 ICD-10-CM codes, and the article stated that those were the only covered diagnoses. Any table of seven codes on a billing blog, including the one below, is a starting point.

Pull your own list. Open the CMS Medicare Coverage Database, filter by CPT code 70450 and by your contractor, and work from the article your MAC has in effect today.

What ICD-10 Codes Support Medical Necessity for CPT 70450?

CPT 70450 requires an ICD-10-CM diagnosis code that reflects the acute symptom or condition prompting the scan.

Code the reason for the exam as the record documented it at the time of imaging. The impression in the radiology report arrives after the payer’s question has already been asked, so it belongs in the chart rather than in the first-listed diagnosis field.

Commonly Paired Diagnosis Codes

Treat that table as a starting point. The operative list belongs to your MAC’s active article, and it runs to thousands of codes rather than seven. Our LCD diagnosis pairing guide shows the same lookup applied to vascular studies.

The Symptom Codes That Draw Review

Headache, dizziness, and syncope codes aren’t excluded from coverage. Submitted alone, they read to a reviewer as routine complaints, and the claim drops into secondary review while your AR ages.

Pair them with risk factors already sitting in the chart. Anticoagulant therapy, coded as Z79.01, changes how a reviewer reads a fall. So does a documented trauma mechanism, a focal deficit, or an age threshold the LCD names. The symptom code opens the claim and the risk factor closes it.

Most practices don’t need a longer diagnosis list. They need a crosswalk mapping their 15 most common ordering indications to codes their MAC covers today. That build takes a couple of days, and our denial management support team sets it up during onboarding.

Does CPT 70450 Require Prior Authorization?

CPT 70450 doesn’t require prior authorization under traditional Medicare, though Medicare Advantage and commercial plans frequently do.

Traditional Medicare and Medicare Advantage

Traditional Medicare fee-for-service pays 70450 without an authorization requirement. Medicare Advantage plans run their own utilization management, and many require authorization for advanced imaging that the parent program never asked for.

Managed Medicaid plans often require it too, including in urgent settings. Verify by plan rather than by program. Two patients carrying Medicare cards can sit under different rules.

Commercial Payer Requirements

Commercial authorization requirements for 70450 vary by plan design more than by carrier. Larger employer plans often route advanced imaging through a radiology benefit manager, which adds a second approval layer with its own clinical criteria.

Emergency and inpatient scans usually sit outside the requirement, since nobody stops a stroke workup to call for approval. An authorization request for a non-contrast head CT needs the clinical indication, the ordering provider’s note, and the specific study requested.

Build a payer-by-plan authorization matrix and keep it current. Our prior authorization services team maintains those matrices for practices across all 50 states, because the requirements shift more often than most billing departments can track.

Trigger the check at order entry rather than at the scanner. A patient already on the table is a patient you’re scanning either way, and the prior authorization workflow guide covers where that trigger belongs in a front-desk process.

The AUC Program No Longer Applies

The AUC program under PAMA stopped applying to Medicare claims on January 1, 2024. CMS paused implementation and rescinded the regulations at 42 CFR 414.94.

Providers should no longer put AUC consultation information on Medicare fee-for-service claims. The G-codes and the AUC modifiers, MA through MH and QQ, came off the reporting requirement, and the MACs removed the related edits.

You’ll still find 2026 guidance telling providers to consult a clinical decision support mechanism and append an AUC modifier to head CT claims. Following it puts retired modifiers on live claims, which is a rejection waiting to happen.

Can CPT 70450 and 70496 Be Billed Together?

CPT 70450 generally can’t be billed with 70496 in the same session, because the CTA head code already includes noncontrast images when the team performs them.

The Single Technical Study Rule

The NCCI Policy Manual, Chapter 9, sets the rule for 70450 and 70496. One technical study producing the images behind separate CT and CTA reports of the same anatomic region supports one reported procedure.

One acquisition, one billable study. The number of reports the radiologist dictates off that dataset doesn’t change the answer, and neither does the fact that two orders exist in the chart.

When Both Codes Can Be Reported

CPT 70450 and 70496 can both be reported in circumstances CMS describes as uncommon: distinct technical studies, or separate encounters on the same calendar date.

Clear a real documentation bar before you bill the pair. Separate physician orders. Separate acquisitions. Distinct documented indications. Separate interpretation reports. With that record behind you, XE for a separate encounter holds up better than a bare 59.

Check the current quarter’s edit pair before you submit. CMS updates the NCCI tables quarterly, and a pair reportable in one quarter can bundle in the next. The same trap runs through vascular studies, which our NCCI same-day bundling guide covers in detail.

What Changed for CPT 70450 in the 2026 CPT Update?

CPT code 70450 gained a companion add-on code in 2026, because 70472 reports CT cerebral perfusion performed alongside a concurrent head CT.

New Add-On Code 70472 for CT Cerebral Perfusion

CPT 70472 is a Category I add-on code covering CT cerebral perfusion analysis with contrast, including image postprocessing, performed with a concurrent CT or CTA of the same anatomy. The AMA parenthetical instructs coders to report it in conjunction with 70450, 70460, 70470, 70471, and 70496.

For a stroke workflow, that changes the claim. A non-contrast head CT followed by perfusion analysis in the same session now reports as 70450 plus 70472.

70473 is the standalone version, used when perfusion runs without a concurrent CT or CTA of the same anatomy. Keep it off any claim carrying 70450. Reversing those two is the predictable 2026 error on this family, and it produces a bundling denial rather than a front-end rejection, so it surfaces after your payment timing has already slipped.

New Combined Code 70471 for CTA Head and Neck

CPT 70471 reports combined CTA of the head and neck with contrast, including noncontrast images when performed and image postprocessing. CMS addressed the valuation of this family in the CY 2026 Federal Register rule.

It applies when the team performs both a CTA head and a CTA neck together, and it replaces separate reporting of 70496 and 70498 in that scenario. The single-region codes stay valid, so a CTA head performed alone still reports as 70496.

The CPT Editorial Panel bundled the pair after finding the two studies ran together more than 75% of the time. Cardiac imaging went through the same bundling logic, and our coronary CTA bundling rules guide shows how that plays out on a claim.

Deleted Code 0042T

Category III code 0042T for cerebral perfusion analysis is gone, replaced by 70472 and 70473 in the 2026 update.

Search your charge master, your order sets, and your superbills for 0042T. Anything still carrying it rejects at the clearinghouse, and the fix takes minutes once someone goes looking.

Can CPT 70450 Be Billed With Other Head Imaging Codes?

CPT 70450 can be reported with 70480 or 70486 when the record documents separate anatomic studies with distinct acquisitions and separate reports.

70450 and 70480 Orbit CT

CPT 70480 covers CT of the orbit, sella turcica, posterior fossa, or the outer, middle, and inner ear, without contrast. It doesn’t cover the brain and it doesn’t cover the sinuses, though guidance circulating online gets that wrong often enough that the error now shows up in search suggestions.

NCCI carries procedure-to-procedure edits between 70450 and 70480, so the orbit study denies without a supporting modifier. Clear the same bar as the CTA pairing: two distinct reports, different imaging techniques, separate acquisitions. Expect MPPR to reduce the technical payment when both run in one session.

70450 and 70486 Maxillofacial CT

CPT 70486 covers maxillofacial CT without contrast, another distinct anatomic region from the brain. The same principle applies, and the same documentation carries it.

Across this whole family, the claim turns on whether someone ordered, performed, and reported two separate studies. A modifier documents that answer. It can’t create one. Unit limits work the same way, which our MUE unit limits guide covers on a different code family.

How Many Units of CPT 70450 Can Be Billed Per Day?

CPT 70450 reports as one unit per scan, and additional units need documentation supporting a repeated study.

One Scan, One Unit

Medically Unlikely Edits cap the units CMS allows on one line for one date of service. CMS sets those caps so that multiple units stay uncommon on a code like this one.

Exceed the MUE and the line denies. Getting paid then means an appeal with documentation attached, which costs more staff time than the second unit returns. Verify the current MUE value for 70450 in the CMS files before you bill more than one unit.

Repeat Head CT on the Same Day

A repeat CPT 70450 on the same day is billable when the record supports it, and it happens routinely in trauma and hemorrhage monitoring. Modifier 76 covers a repeat by the same physician, and modifier 77 covers a repeat by a different one.

The documentation has to show a new clinical question. An initial scan for trauma followed by a repeat after the patient deteriorates gives you two studies with two indications. A repeat documented as follow-up gives you one study billed twice.

Three head CTs in one day alongside a CTA brain is a real trauma center scenario and it’s defensible. Each study needs its own indication in the record, each repeat needs the correct modifier, and the CTA still falls under the bundling rule above. Rest-and-stress protocols raise the same questions, which our multiple-study imaging rules guide addresses.

What Documentation Does a CPT 70450 Claim Require?

CPT 70450 claims require a signed order, a documented clinical indication, and a radiology report stating that no contrast was administered.

Six items belong in the record before the claim goes out.

1. A signed, dated order specifying head or brain CT without contrast, with the clinical indication on it.
2. A radiology report carrying a technique statement that confirms no contrast material was administered.
3. Findings and impression, signed and dated by the interpreting physician. A preliminary read doesn’t support payment.
4. An ICD-10-CM code the ordering documentation supports, not one selected from the radiologist’s impression.
5. Clinical notes from the ordering provider meeting the medical necessity criteria in your MAC’s active article.
6. Justification for any repeat study performed on the same date, tied to a new clinical question.

Item two fails more often than the rest combined. A report that never states the study ran without contrast leaves your code selection unverifiable, and an auditor reading it can’t confirm 70450 was correct.

The technique statement takes one line to dictate. That line is what defends the claim 18 months later when a record request arrives and the radiologist who read the study has moved on.

Why Was My CPT 70450 Claim Denied?

CPT 70450 denials trace to four causes: contrast status mismatch, modifier error, unsupported medical necessity, and bundling edits.

Common Denial Reasons and Fixes

Documentation-request denials arrive with their own codes and their own clock. Our CO-226 documentation denials guide covers the response window and what belongs in the packet.

How to Appeal a Medical Necessity Denial on 70450

A medical necessity appeal on CPT 70450 needs four documents pulled into one packet: the ordering note establishing the clinical question, the technique statement, the interpretation, and the specific language from your MAC’s article the case satisfies.

Start with redetermination, the first level of the Medicare appeal process. Track the appeal deadline separately from the original timely filing deadline, because those clocks run independently and teams miss the second one after winning the first. Remark codes on the remittance tell you which argument the payer expects, and our N130 remark pairings guide decodes the most common ones.

Denials on a code this common show up on a remittance, but they start in a workflow. If your imaging denials keep repeating the same four causes, the pattern is fixable upstream of the claim, which is where full-service medical billing work belongs.

CPT Code 70450 Frequently Asked Questions

What is CPT code 70450 used for?

CPT code 70450 bills a CT scan of the head or brain performed without contrast material. Providers order it for head trauma, suspected stroke, intracranial hemorrhage, acute severe headache, seizure evaluation, and suspected shunt malfunction. It’s one of the highest-volume imaging codes in emergency and outpatient settings, which makes it a standing audit target.

What is the difference between CPT codes 70450, 70460 and 70470?

CPT 70450 covers head CT without contrast, 70460 covers head CT with contrast, and 70470 covers both phases performed in one session. Report 70470 alone for a two-phase study rather than billing 70450 and 70460 separately. The technique section of the radiology report determines which of the three applies.

Does 70450 need a modifier?

CPT 70450 needs a modifier when the professional and technical components are billed by different entities. An independent radiology group appends modifier 26 for the interpretation. The facility appends modifier TC for the equipment and technologist. An entity owning both bills the code globally with no modifier at all.

What modifier is used for CPT code 70450?

Modifier 26 and modifier TC are the two component modifiers used with CPT code 70450. Modifier CT applies when the scanner doesn’t meet the NEMA XR-29 standard and reduces the technical payment by 15%. Modifiers 76 and 77 apply to repeat studies, and modifier 59 or an X modifier applies to distinct services.

Can CPT 70450 and 70496 be billed together?

CPT 70450 and 70496 generally can’t be billed together in the same session, because the CTA head code includes noncontrast images when performed. The NCCI Policy Manual allows separate reporting only for distinct technical studies or separate encounters. Both need separate orders, acquisitions, indications, and interpretation reports to survive review.

Can CPT 70450 be billed with 70471?

CPT 70471 is the 2026 combined CTA head and neck code, and it includes noncontrast images when performed. A non-contrast head CT bundled into the same acquisition doesn’t support a separate 70450 charge. Separate encounters on the same date can support both codes, provided the documentation shows two distinct studies.

Can you bill CPT 70450 and 70480 together?

CPT 70450 and 70480 can be billed together when two separate anatomic studies were ordered, performed, and reported. NCCI carries procedure-to-procedure edits between them, so 70480 denies without a supporting modifier. Expect the Multiple Procedure Payment Reduction to cut the technical component of the lower-valued code.

Does CPT 70450 require prior authorization?

CPT 70450 doesn’t require prior authorization under traditional Medicare fee-for-service. Medicare Advantage plans and managed Medicaid plans frequently do require it, including for scans in urgent settings. Commercial requirements vary by plan design, and larger employer plans often route advanced imaging through a radiology benefit manager with its own criteria.

What ICD-10 codes support medical necessity for CPT 70450?

CPT 70450 pairs with the acute symptom or condition that prompted the scan. Frequently used codes include S09.90XA for head injury, I63.9 for cerebral infarction, I61.9 for intracerebral hemorrhage, G45.9 for TIA, and R51.9 for headache. Your MAC’s active article carries the operative list, and it runs to thousands of codes.

What is the cost of CPT code 70450?

CPT code 70450 has three different prices depending on what you’re measuring. The hospital charge is a list price few payers pay. The Medicare allowed amount comes from the RVUs multiplied by the 2026 conversion factor and your locality’s GPCI values. Patient responsibility depends on deductible status and plan design.

Is CPT code 70450 a diagnostic or radiology code?

CPT code 70450 is a diagnostic radiology code. It sits in the Diagnostic Radiology section of the CPT manual under Diagnostic Imaging Procedures of the Head and Neck, which spans codes 70010 to 70559. The AMA maintains the descriptor, and CMS assigns the payment values through the Physician Fee Schedule.

Getting CPT 70450 Claims Paid the First Time

Three things separate a clean CPT 70450 claim from a denied one, and none of them are complicated. The technique section confirms contrast status. The modifier matches whoever performed and read the study. The diagnosis satisfies your MAC’s active policy. Miss any of the three and the claim sits in your aging report while your days in AR benchmarks slide.

Four items are worth clearing this quarter. Confirm which conversion factor applies to your group. Search your charge master for 0042T. Add 70472 to your stroke workflow order sets. Check whether the coverage article your billing team references is still active.

None of this is exotic. It slips when a billing team carries too many codes across too many payers and nobody owns the imaging line. If that describes your practice, One O Seven RCM runs the full revenue cycle for radiology and imaging practices in all 50 states, and every engagement opens with a free audit that shows where the money is going.