Thyroid Stimulating Hormone Receptor Antibody (TRAb)
Label Mnemonic: TSHRAB
Epic Lab Code: LAB4213
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Serum
Specimen Instructions:
Allow serum to sit for 15-20 minutes at room temperature for proper clot formation. Centrifuge and separate serum from cells ASAP or within 2 hours of collection.

Separate specimens must be submitted when multiple tests are ordered.
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
Prepferred Minimum: 1 mL serum in red top tube
Absolute Minimum: 0.3 mL serum in red top tube
Rejection Criteria:
Plasma. Grossly hemolyzed or lipemic specimens.
Turn Around Time:
1-2 days upon receipt at reference laboratory
Reference Range:
Less than or equal to 1.75 IU/L
Comments:
To confirm diagnosis of Graves' disease, Thyroid Stimulating Immunoglobulin (LAB4165) is generally the preferred test.
Methodology:
Quantitative Electrochemiluminescent Immunoassay
CPT Code:
83520