Thyroid Group #14

Test Code

CPT Codes
84439, 84443

Free T4; TSH

Preferred Specimen

2 mL serum collected in a serum seperator tube

Minimum Volume
0.5 mL

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
See individual tests

Immunoassay (IA)

Setup Schedule
See individual assay

Reference Range

See Laboratory Report

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.