CPT 70496Radiology

Ct angiography head

CPT code 70496 is for a CT angiography of the head, which is a specialized imaging test that uses X-rays and contrast dye to create detailed pictures of the blood vessels in your brain.

Showing rates for

National Average

Base Medicare rate

$272.36

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

1.75

PE RVU (NF)

6.56

MP RVU

0.11

Total RVU

8.42

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

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Billing tips

Always verify contrast administration is documented in the medical record before billing 70496 rather than non-contrast code 70450
Impact: Using correct contrast code increases reimbursement by approximately $100-150 compared to non-contrast study
Document medical necessity clearly with specific clinical indication (not just 'headache' but 'thunderclap headache concerning for SAH' or 'acute stroke protocol')
Impact: Reduces denial rate by 60-70% and prevents medical necessity reviews that delay payment 30-60 days
Bill facility and non-facility settings correctly - both have identical rates ($272.36) for 70496, but component billing (26/TC) requires accurate place of service codes
Impact: Prevents claim rejections and resubmission delays; ensures clean claim processing within 14-21 days
Do not bill 70496 with 70450 or 70470 on same encounter - these are mutually exclusive; choose the code that reflects all contrast phases performed
Impact: Prevents bundling denials that result in $0 payment for secondary code and potential recoupment audits
For stroke protocol imaging, ensure ordering physician documents time-sensitive medical necessity and that study is performed emergently
Impact: Supports medical necessity and may justify modifier use; prevents retrospective denials averaging $272.36 per claim
When billing globally (without modifier), confirm your facility owns equipment and radiologist is employed/contracted for interpretation
Impact: Incorrect component billing can result in 100% claim denial requiring appeal and 45-90 day payment delay

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 70496 in 2025?

Medicare pays $272.36 for CPT code 70496 in 2025 (both facility and non-facility national average rates are identical). This rate is based on 8.42 total RVUs multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 70496 and 70450?

CPT 70496 is a CT angiography of the head with contrast specifically designed to visualize blood vessels, while 70450 is a standard CT of the head without contrast. Code 70496 requires IV contrast administration and specialized angiographic protocols with vascular reconstruction, whereas 70450 is a basic brain parenchyma study without contrast or vascular focus.

Can you bill CPT 70496 and 70450 together on the same day?

No, CPT 70496 and 70450 should not typically be billed together as they are mutually exclusive for the same anatomic area. The CTA head (70496) includes the imaging information that would be obtained from a non-contrast study. If both are medically necessary and documented separately, modifier 59 may be required with clear documentation of distinct clinical purposes.

How many RVUs is CPT code 70496 worth?

CPT 70496 has 8.42 total RVUs in 2025, consisting of 1.75 work RVUs, 6.56 practice expense RVUs (both facility and non-facility), and 0.11 malpractice RVUs. This makes it a moderately valued imaging procedure reflecting the technical complexity and professional interpretation required.

What diagnosis codes support medical necessity for CPT 70496?

Common supporting diagnoses include I67.1 (cerebral aneurysm), I63.x series (cerebral infarction/stroke), G45.9 (TIA), I60.x (subarachnoid hemorrhage), R51 (headache when severe/sudden onset), I67.2 (cerebral atherosclerosis), and I65.x (cerebrovascular stenosis). Documentation must clearly link the clinical presentation to the need for vascular imaging.

Do I need modifier 26 or TC when billing CPT 70496?

Use modifier 26 when billing only the professional component (physician interpretation and report). Use modifier TC when billing only the technical component (equipment, technologist, supplies). Bill without modifiers (globally) only when your entity owns the equipment AND employs/contracts the interpreting radiologist. Split billing is common between hospitals (TC) and radiologist groups (26).

What are the documentation requirements to bill CPT 70496?

Required documentation includes: physician order with clinical indication, confirmation of IV contrast administration (type and volume), complete radiologist interpretation report, patient consent for contrast, renal function/allergy screening, medical necessity justification, and technical imaging parameters. Missing contrast documentation is the most common cause of downcoding to non-contrast code 70450.