Which billing codes are affected?

The following codes are affected: 84481, 84482.

CommercialCoverageLow impact

Free Triiodothyronine (T3) and Reverse T3

Q: Who is affected by this change?

This affects Blue Cross & Blue Shield of Mississippi Endocrinology, Internal Medicine, Family Medicine, Cardiology providers in MS on Commercial plans.

Blue Cross & Blue Shield of Mississippi·MS · Endocrinology, Internal Medicine, Family Medicine +1 more·Medical Policy

Effective date

Not stated

We identified it

Jun 20, 2026

Days to comply

—

Summary

BCBS Mississippi updated their Free T3 and Reverse T3 testing policy with no changes to coverage criteria or billing codes. The policy continues to require specific clinical criteria for medical necessity and covers CPT codes 84481 and 84482.

Action Required

Action needed

No immediate action required. This is a routine policy review with no changes to coverage criteria, billing codes, or documentation requirements. Continue following existing T3 testing guidelines.

Affected Billing Codes

84481

84482

Related policy hubs

Blue Cross & Blue Shield of Mississippi policies MS policy changes Endocrinology Internal Medicine Family Medicine Cardiology Code 84481 Code 84482