CPT 79403Radiology

Hematopoietic nuclear tx

CPT 79403 covers radioactive treatment given to patients to help with certain blood disorders, particularly polycythemia vera. The therapy uses radioactive phosphorus (P-32) that targets overactive bone marrow cells.

Showing rates for

National Average

Base Medicare rate

$164.97

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

2.25

PE RVU (NF)

2.78

MP RVU

0.07

Total RVU

5.1

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

NCCI bundling edits

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Billing tips

Bill the radiopharmaceutical (P-32) separately using HCPCS code A9564 or appropriate supply code, as CPT 79403 covers only the administration service
Impact: Radiopharmaceutical costs can exceed $1,500-$3,000; failure to bill separately results in significant revenue loss
Document radiation safety counseling, written consent, and pregnancy test results for women of childbearing age to support medical necessity and reduce liability
Impact: Missing safety documentation is a top audit trigger and can result in 100% claim denial
Verify coverage prior to treatment as many Medicare Advantage plans require prior authorization for nuclear medicine therapy despite Original Medicare not requiring it
Impact: Prior authorization failures account for 30-40% of payment denials for this code
Code the appropriate ICD-10 diagnosis (D45 for polycythemia vera, D47.1 for other myeloproliferative disorders) as primary diagnosis to establish medical necessity
Impact: Incorrect or non-specific diagnosis codes trigger automatic denials; proper coding ensures first-pass payment
Submit claim within 30 days of service as radioactive materials documentation and radiation safety records must be contemporaneous
Impact: Delayed billing increases audit risk and complicates radiation exposure record reconciliation
When billing in a hospital setting, ensure proper coordination between hospital registration, nuclear medicine, and billing to capture both the 79403 service and separate facility fees
Impact: Coordination failures result in underbilling of 15-25% of eligible facility charges

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Frequently asked questions

What is the 2025 Medicare reimbursement rate for CPT code 79403?

The 2025 Medicare national average reimbursement for CPT 79403 is $164.97 for both facility and non-facility settings. This rate is based on 5.10 total RVUs (2.25 work RVU, 2.78 PE RVU, 0.07 MP RVU) multiplied by the 2025 conversion factor of 32.3465.

Does CPT 79403 include the cost of the radiopharmaceutical?

No, CPT 79403 covers only the administration service and physician supervision. The radiopharmaceutical (typically phosphorus-32) must be billed separately using the appropriate HCPCS code such as A9564, which can add $1,500-$3,000 to the total reimbursement.

What medical conditions justify billing CPT 79403?

CPT 79403 is primarily used for polycythemia vera (ICD-10 D45) that has failed phlebotomy or when the patient cannot tolerate hydroxyurea. It may also be used for other myeloproliferative disorders (D47.1) and selected cases of thrombocythemia when conventional therapies are inadequate or contraindicated.

Can CPT 79403 be billed with an E/M code on the same day?

Yes, but modifier 25 must be appended to the E/M code if a significant, separately identifiable evaluation and management service is provided beyond the routine pre-procedure assessment included in 79403. Documentation must clearly distinguish the separate E/M service to avoid bundling denials.

Who can perform and bill for CPT 79403 services?

CPT 79403 must be performed by or under the direct supervision of a board-certified nuclear medicine physician or radiation oncologist with appropriate state radioactive materials licensure. The supervising physician must be present during radiopharmaceutical administration and document their involvement to bill the service.

Is prior authorization required for CPT 79403?

Original Medicare typically does not require prior authorization for CPT 79403, but most Medicare Advantage plans and commercial insurers do require it due to the specialized nature and cost of nuclear medicine therapy. Always verify coverage and authorization requirements before scheduling the procedure.

What documentation is required to support medical necessity for CPT 79403?

Required documentation includes confirmation of diagnosis (polycythemia vera or other qualifying condition), evidence of failed or contraindicated conventional treatments, hematologist consultation supporting nuclear therapy, radiation safety counseling, informed consent, pregnancy testing for applicable patients, and physician supervision notes during administration.