Posted Date
Effective Date
Update Type Specimen collection or handling and/or storage changed
CPT Code 83520

Order Code:  THRYO
Referral Laboratory:    Mayo Medical Laboratories


Effective April 2, 2020, Specimen requirements for Thyrotropin Receptor Antibody, Serum (THRYO) testing will now be the following, due to an instrument change at Mayo Medical Laboratories.

Current Specimen Minimum Volume

0.5 mL


New Specimen Minimum Volume

0.75 mL