84481 Free assay (ft-3)
Also known as: free T3, FT3, free triiodothyronine
Quantitative assay of free triiodothyronine (free T3) concentration, measuring unbound physiologically active T3.
In Plain Language
thyroid hormone test
Clinical Context
More specific than total T3; evaluates thyroid function in complex cases and thyroiditis.
RVU Information
CPT 84481 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 84481?
CPT 84481 (Free assay (ft-3)) is a Pathology & Lab code. Quantitative assay of free triiodothyronine (free T3) concentration, measuring unbound physiologically active T3.
Who uses CPT code 84481?
CPT 84481 is used by Clinical Chemistry, Endocrinology, Pathology. More specific than total T3; evaluates thyroid function in complex cases and thyroiditis.
When is CPT 84481 used?
More specific than total T3; evaluates thyroid function in complex cases and thyroiditis.
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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.