CPT 79005Radiology

Nuclear rx oral admin

CPT 79005 covers the administration of radioactive medication taken by mouth for therapeutic purposes, such as radioactive iodine treatment for thyroid disease. This is the billing code for giving the patient the oral nuclear medicine dose, not the imaging or follow-up.

Showing rates for

National Average

Base Medicare rate

$130.68

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

1.8

PE RVU (NF)

2.15

MP RVU

0.09

Total RVU

4.04

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

NCCI bundling edits

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Billing tips

Verify the radiopharmaceutical cost is billed separately using appropriate HCPCS codes (e.g., A9517 for I-131 sodium iodide capsules) as 79005 only covers administration
Impact: Radiopharmaceutical costs can range from $500-$5000+ depending on dosage; failure to bill separately results in significant revenue loss
Document exact time of administration, radiation safety counseling provided, and dose verification procedures performed by authorized personnel
Impact: Missing documentation is the leading cause of audits and denials; complete records protect the full $130.68 reimbursement
Ensure the ordering physician's prescription includes specific activity (millicuries), radiopharmaceutical name, and clinical indication for medical necessity
Impact: Missing prescription elements trigger denials requiring appeal and delay payment by 30-90 days
Bill on the date of administration, not the date of preparation or planning; coordinate with nuclear pharmacy for accurate date coding
Impact: Date discrepancies between pharmacy records and billing can result in payment delays or coordination of benefits issues
Check payer-specific policies regarding place of service codes; some payers require POS 22 for outpatient hospital vs POS 19 for off-campus
Impact: Incorrect POS codes can result in 10-25% payment reduction or full denial depending on payer contracts
Link appropriate ICD-10 diagnosis codes that demonstrate medical necessity (e.g., E05.xx for hyperthyroidism, C73 for thyroid malignancy)
Impact: Non-specific or unsupported diagnosis codes increase denial risk by approximately 15-20% based on Medicare audit data

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 79005 in 2025?

The 2025 Medicare national average reimbursement for CPT 79005 is $130.68 for both facility and non-facility settings. This rate is based on 4.04 total RVUs (1.8 work RVU, 2.15 practice expense RVU, 0.09 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

Does CPT 79005 include the cost of the radioactive medication?

No, CPT 79005 covers only the administration service, including counseling, safety protocols, and dose delivery. The radiopharmaceutical must be billed separately using the appropriate HCPCS code (such as A9517 for I-131 sodium iodide, A9606 for Ra-223 dichloride) with specific activity levels documented.

Can I bill an E/M service on the same day as CPT 79005?

Yes, but only if the E/M service is significant and separately identifiable from the standard counseling included in the administration code. Use modifier 25 on the E/M code and document the distinct medical decision-making or evaluation performed beyond the radiation safety counseling inherent to 79005.

What documentation is required to bill CPT 79005 compliantly?

Required documentation includes a written directive from an authorized user, dose verification records, time-stamped administration documentation, radiation safety counseling notes with written patient instructions, pregnancy test results when applicable, post-administration survey results, and proof of NRC/Agreement State licensure for the facility and authorized user.

Which medical specialties typically bill CPT code 79005?

CPT 79005 is primarily billed by nuclear medicine physicians, endocrinologists with nuclear medicine privileges, radiation oncologists, and radiologists. The procedure must be performed under the supervision of an NRC-authorized user with specific licensure for therapeutic nuclear medicine administration.

How many RVUs is CPT 79005 worth in 2025?

CPT 79005 has a total of 4.04 RVUs in 2025, consisting of 1.8 work RVUs, 2.15 practice expense RVUs (both facility and non-facility), and 0.09 malpractice RVUs. These values are from the CMS Medicare Physician Fee Schedule RVU25A released December 23, 2024.

What are the most common reasons for denials of CPT 79005?

The most common denial reasons include missing radiation safety documentation, lack of medical necessity support (especially for hyperthyroidism without documented failed conservative therapy), bundling issues with same-day services, and discrepancies between radiopharmaceutical billing and administration records. Complete documentation of NRC compliance and written directives is essential.