Posted Date
Effective Date
Update Type New Tests
CPT Code 84445

Order Code:                  TSI

Fee Code:                     20084

Effective October 1, 2019 MLabs will offer Thyroid Stimulating Immunoglobulin, Serum (TSI) testing. This will replace the Mayo Medical Laboratory sendout test.

Specimen Collection: Collect approximately 3 mL of whole blood in a red top or serum separator tube (SST). Centrifuged and aliquot the serum into a plastic vial. Ship the specimen frozen (preferred) or refrigerated.

Methodology: Recombinant Bioassay for measuring relative TSH-stimulating activity

Set Up/ Analytic Time: Monday- Friday, 2-7 days