T3, Free and Total

Test Code

6712

CPT Codes
84480, 84481

Preferred Specimen

1 mL serum collected in a serum separator tube (SST)

Minimum Volume

0.6 mL

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 5 days
Refrigerated: 14 days
Frozen: 60 days

Methodology
Chemiluminescence Assay

Setup Schedule

Set up: Mon-Sat; Report available: 1-4 days

Reference Range

T3, Free
<1 year:	Not established
1-9 years:	3.4 - 5.1	pg/mL
10-13 years:	3.4 - 4.8	pg/mL
14-18 years:	2.9 - 4.6	pg/mL
>18 years:	2.3 - 4.2	pg/mL

T3, Total
<4 years:	Not established
4-9 years:	104 - 190	ng/dL
10-13 years:	94 - 213	ng/dL
14-17 years:	84 - 179	ng/dL
≥18 years:	76 - 181	ng/dL

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.