CPT 78020Radiology

Thyroid met uptake

CPT code 78020 covers a nuclear medicine test that measures how much radioactive tracer is absorbed by thyroid cancer cells that have spread (metastasized) to other parts of the body. This test helps doctors locate and monitor thyroid cancer that has spread beyond the thyroid gland.

Showing rates for

National Average

Base Medicare rate

$76.66

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

0.6

PE RVU (NF)

1.73

MP RVU

0.04

Total RVU

2.37

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

NCCI bundling edits

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Billing tips

Bill 78020 only for metastases uptake studies, not routine thyroid uptake measurements (use 78012-78014 for routine uptake)
Impact: Prevents denials and downcoding; 78020 is specifically for metastatic disease evaluation, not thyroid function assessment
Document the patient's history of thyroid carcinoma and clinical indication for metastases evaluation in the order and report
Impact: Establishes medical necessity; missing cancer history documentation is the leading cause of denials for 78020
Verify whether billing globally or splitting TC/26 based on your practice arrangement before claim submission
Impact: The $76.66 rate applies to global billing; incorrect modifier use results in significant underpayment or denial
When performed with therapeutic radioiodine administration (79005), bill both services separately with appropriate documentation
Impact: 78020 diagnostic uptake study is separately billable from therapeutic administration when medically necessary
Ensure radiopharmaceutical type and dosage are documented in the medical record, particularly when using I-131 versus I-123
Impact: Supports medical necessity and proper coding; auditors specifically review radiopharmaceutical documentation for nuclear medicine codes
Bill on the date of imaging/measurement, not the date of radiopharmaceutical administration if different days
Impact: Ensures accurate date of service reporting; uptake measurements may occur 24-72 hours after tracer administration

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Frequently asked questions

What is the Medicare reimbursement rate for CPT 78020 in 2025?

The 2025 Medicare national average payment rate for CPT 78020 is $76.66 for both facility and non-facility settings. This rate is based on 2.37 total RVUs multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 78020 and routine thyroid uptake codes?

CPT 78020 is specifically for thyroid metastases uptake studies in patients with known or suspected metastatic thyroid cancer, designed to locate cancer spread. Routine thyroid uptake studies (78012-78014) measure thyroid gland function for diagnosing hyperthyroidism, hypothyroidism, or thyroid nodules, not cancer metastases.

How many RVUs is CPT code 78020 worth?

CPT 78020 has 2.37 total RVUs in 2025, consisting of 0.6 work RVUs, 1.73 practice expense RVUs, and 0.04 malpractice RVUs. The practice expense RVU is the same (1.73) for both facility and non-facility settings.

Can CPT 78020 be billed with thyroid imaging codes on the same day?

Yes, but careful documentation is required. CPT 78020 (uptake measurement) may be billed with thyroid imaging codes (78000-78018) when both are medically necessary and distinct, though NCCI edits may apply. Modifier 59 may be needed to indicate separate procedural services with appropriate documentation of medical necessity for both procedures.

What diagnosis codes support medical necessity for CPT 78020?

Primary supporting ICD-10 codes include C73 (malignant neoplasm of thyroid gland), C78.x and C79.x codes (secondary malignant neoplasms showing metastatic sites), and Z85.850 (personal history of malignant neoplasm of thyroid). The diagnosis must demonstrate thyroid cancer history or active metastatic disease to justify the metastases uptake study.

Who can perform and bill for CPT 78020?

CPT 78020 must be performed under the supervision of a physician certified in nuclear medicine or radiology with nuclear medicine training. The facility must have appropriate radioactive materials licensing. Licensed nuclear medicine technologists typically perform the technical component, while physicians bill for interpretation (professional component) or the entire service depending on practice arrangement.

How often can CPT 78020 be billed for the same patient?

There is no specific Medicare frequency limitation for CPT 78020, but medical necessity must be documented for each study. Typical clinical scenarios include post-thyroidectomy surveillance (every 6-12 months), pre-radioactive iodine therapy planning, or evaluation when tumor markers rise. More frequent studies require clear documentation of changed clinical status or specific clinical indication.