Summary & Overview
CPT 78015: Thyroid Scan, Nuclear Medicine Diagnostic Imaging
CPT code 78015 represents a diagnostic nuclear medicine thyroid scan used to assess thyroid function, identify thyroid nodules, and in some cases perform whole-body imaging for patients with prior thyroid cancer. This imaging code is clinically important because it guides diagnosis and staging for thyroid disorders and can influence management decisions for nodules and malignancy surveillance. Nationally, thyroid imaging use intersects with specialty care in endocrinology, oncology, and nuclear medicine.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for CPT code 78015, typical sites of service, and the service category. The publication summarizes common billing modifiers and identifies where input is not available. It also outlines what to expect in benchmarking and reimbursement discussions and highlights policy considerations relevant to imaging utilization and prior authorization trends. Data not available in the input is noted when applicable. The report is intended for billing managers, practice administrators, and policy analysts seeking a national-level briefing on CPT code 78015 and its clinical and billing context.
Billing Code Overview
CPT code 78015 describes a thyroid scan, a nuclear medicine examination that uses a radionuclide to evaluate thyroid gland function or to detect thyroid nodules. The procedure can also include a whole-body thyroid scan when performed for surveillance of patients with a history of thyroid cancer to assess for metastatic disease.
Service type: Nuclear medicine diagnostic imaging
Typical site of service: Hospital outpatient imaging centers or hospital-based nuclear medicine departments
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45–70 year-old presenting with a palpable thyroid nodule, abnormal thyroid function tests, or follow-up after thyroid cancer treatment. The physician orders a nuclear medicine thyroid scan using a radionuclide (commonly technetium-99m pertechnetate or I-123) to evaluate thyroid uptake, distinguish “hot” versus “cold” nodules, assess diffuse uptake in Graves’ disease, or perform whole-body imaging in post-thyroidectomy patients to detect metastatic thyroid cancer. The clinical workflow includes: referral from endocrinology or primary care; pre-procedure medication review (e.g., recent iodine or thyroid hormone use); radiopharmacy preparation and administration of radiotracer; patient positioning in the nuclear medicine department or outpatient imaging center; planar and/or SPECT acquisition of the thyroid (and whole body when indicated); image processing and interpretation by a nuclear medicine physician or radiologist; and delivery of a written report to the referring clinician. Typical sites of service are hospital-based outpatient imaging departments, freestanding imaging centers, and ambulatory nuclear medicine suites. Imaging may be performed with or without additional lab testing such as serum TSH or thyroglobulin depending on the indication.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician interpretation component and technical component is billed separately. |