Posted Date
Effective Date
Test Name
T4 (Thyroxine), Free by Dialysis
Update Type
Test Down or Delayed
CPT Code
84439
Order Code
FRT4D
Referral Laboratory
Mayo Medical Laboratories
TEST DOWN
T4 (Thyroxine), Free by Dialysis
Order Code: FRT4D
Fee Code: AA589 (CPT 84439)
Reference Laboratory: Mayo FRT4D
Mayo Clinic Laboratories T4 (Thyroxine), Free by Dialysis assay is down effective August 23, 2024. Testing will be forwarded to Quest Diagnostics (Mayo test ID FFT4F) until further notice.