Thyroglobulin Antibodies (THGAB)

Test Code
LAB515

Quest Code
267

CPT Codes
86800

Preferred Specimen
1 mL serum in gold top or plain red top tube

Patient Preparation
Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.

Minimum Volume
0.5 mL

Transport Container
Serum Separator Tube (SST®)

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic

Methodology
Immunoassay (IA)

Setup Schedule
9am Mon, tues, wed, thurs, fri

Report Available
4 days

Limitations
Heterophil antibodies may produce falsely-elevated results.

Reference Range
≤1 IU/mL

Clinical Significance
Measurement of thyroglobulin antibodies is useful in the diagnosis and management of a variety of thyroid disorders including Hashimoto's thyroiditis, Graves' disease and certain types of goiter.

Performing Laboratory
Quest Diagnostics - South Region




The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.