CPT 77750Radiology

Infuse radioactive materials

CPT code 77750 covers the infusion of radioactive materials into a patient's body for therapeutic purposes, typically used to treat certain cancers or other conditions requiring targeted radiation therapy delivered internally.

Showing rates for

National Average

Base Medicare rate

$387.51

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

PE RVU (NF)

6.73

MP RVU

0.25

Total RVU

11.98

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

NCCI bundling edits

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Billing tips

Always verify that facility holds current NRC or Agreement State license for the specific radioisotope being administered before billing
Impact: Prevents 100% claim denial and potential fraud allegations; unlicensed administration is unbillable and legally prohibited
Document the exact radioisotope, activity level (in mCi or GBq), route of administration, and dosimetry calculations in medical record
Impact: Essential for audit defense; missing dosimetry documentation is leading cause of recoupment demands averaging $387.51 per occurrence
Bill for the drug/radiopharmaceutical separately using appropriate HCPCS codes (e.g., A9606 for Ra-223, A9513 for Lu-177) as 77750 covers only administration
Impact: Radiopharmaceuticals can represent $10,000-$50,000+ in additional reimbursement; failing to bill separately loses significant revenue
Coordinate billing with diagnostic imaging codes (78000-78299 series) performed for treatment planning or verification, ensuring proper sequencing and medical necessity
Impact: Prevents bundling denials; proper documentation supports additional $200-$800 in imaging reimbursement
For hospital outpatient settings, ensure both professional (26) and technical (TC) components are billed appropriately based on physician employment status
Impact: Incorrect component billing results in 40-60% underpayment or overpayment with recoupment risk
Submit claims within 30 days of service as radiopharmaceutical decay documentation and dosimetry records have strict retention requirements
Delayed billing increases denial risk by 30%; timely filing also ensures faster cash flow for high-value service

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 77750 in 2025?

The 2025 Medicare national average reimbursement for CPT 77750 is $387.51 for both facility and non-facility settings. This rate is based on 11.98 total RVUs (5.00 work RVU, 6.73 PE RVU, 0.25 MP RVU) multiplied by the 2025 conversion factor of $32.3465. Actual payment may vary by geographic locality.

Does CPT 77750 include the cost of the radioactive drug itself?

No, CPT 77750 covers only the professional and technical service of infusing the radioactive material. The radiopharmaceutical drug must be billed separately using the appropriate HCPCS codes (such as A9606 for Radium-223, A9513 for Lutetium-177 DOTATATE, or A9517 for Iodine-131). The drug cost often represents the majority of total treatment expense.

What licenses are required to bill CPT 77750?

The facility must hold a valid Nuclear Regulatory Commission (NRC) or Agreement State license authorizing therapeutic use of radioactive materials. The administering physician must be listed as an authorized user on that license with specific training in radiation safety and radioisotope therapy. Without proper licensing, the service cannot be legally performed or billed.

Can CPT 77750 be billed multiple times on the same day?

Generally no, unless multiple distinct infusions of different radioisotopes or separate treatments to different anatomic sites are performed with clear medical necessity. Use modifier 76 (repeat procedure by same physician) or 59 (distinct procedural service) with comprehensive documentation explaining why multiple administrations were medically necessary.

What documentation is needed to support medical necessity for CPT 77750?

Required documentation includes confirmed diagnosis with pathology and imaging studies, evidence that condition is appropriate for radioisotope therapy per treatment guidelines, documentation of alternative treatments considered or tried, written treatment plan with dosimetry calculations, and clinical notes explaining therapeutic goals. FDA-approved indications for the specific radiopharmaceutical should be referenced.

How does CPT 77750 differ from other radiation therapy codes?

CPT 77750 is specific to infusion/administration of therapeutic radioactive materials (systemic or cavity-based radioisotope therapy), while external beam radiation codes (77401-77425) cover external radiation delivery, and brachytherapy codes (77750-77799 series) cover implantation of radioactive sources. Code 77750 represents the liquid or oral administration component of internal radiation treatment.

What are common reasons for CPT 77750 claim denials?

The most common denials include lack of medical necessity documentation, missing NRC license verification, incomplete dosimetry calculations, bundling with same-day imaging or planning services, insufficient radiation safety documentation, missing written directive, and failure to document physician supervision during administration. Appeals require comprehensive regulatory and clinical documentation.