84479 Assay of thyroid (t3 or t4)
Also known as: T3/T4, thyroid hormone panel, thyroid hormones
Quantitative assay of serum thyroid hormone (T3 or T4) concentration measured together or individually.
In Plain Language
thyroid hormone test
Clinical Context
Evaluates thyroid function in hyper/hypothyroidism; T4 primary driver, T3 secondary with specific clinical contexts.
RVU Information
CPT 84479 does not have a physician work RVU assigned by CMS. Reimbursement for this code is determined by payer-specific fee schedules.
Billing & Documentation
Lab and pathology codes require an order from the treating provider with clinical indication. For molecular pathology and genetic testing, document the specific analytes tested and clinical rationale.
How This Code Compares
This code has a work RVU of 0.00, meaning it does not have a physician work component assigned by CMS. In the Pathology & Lab category, 94% of codes share this characteristic.
Specialties
Frequently Asked Questions
What is CPT code 84479?
CPT 84479 (Assay of thyroid (t3 or t4)) is a Pathology & Lab code. Quantitative assay of serum thyroid hormone (T3 or T4) concentration measured together or individually.
Who uses CPT code 84479?
CPT 84479 is used by Clinical Chemistry, Endocrinology, Pathology. Evaluates thyroid function in hyper/hypothyroidism; T4 primary driver, T3 secondary with specific clinical contexts.
When is CPT 84479 used?
Evaluates thyroid function in hyper/hypothyroidism; T4 primary driver, T3 secondary with specific clinical contexts.
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CPT® is a registered trademark of the American Medical Association. Data sourced from CMS Physician Fee Schedule RVU26A. Descriptions, synonyms, and clinical context are original content by RVU Edge.