TBII-Thyrotropin Binding Inhibitory Immunoglobulin

Test Code

CPT Codes

Preferred Specimen
1 mL serum

Minimum Volume
0.5 mL

Transport Container
Plastic screw-cap vial

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 30 days

Radioreceptor Assay (RRA)

Reference Range
≤16% Inhibition

Clinical Significance
Measurement of TBII is used to diagnose and manage Graves' disease, neonatal hypothyroidism, and postpartum thyroid dysfunction.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

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.