Test Name

Thyroid Panel

Panel includes

TSH, Free T4 & Free T3

Specimen Type & Acceptability

7 days refrigerated.

General Use

Panel is used to assess thyroid function and aid in the diagnosis of hyperthyroidism and hypothyroidism. Testing can also be used to follow patient therapy.

CPT Code(s)

84439, 84443, 84481

Special Instructions

Let clot for 10-20 minutes. After the sample is fully clotted, centrifuge the sample. Verify complete separation between cells and serum. DO NOT OPEN TUBE and refrigerate.

Container/Tube Type


2 mL Min. vol. = 500 ul

Suggested Tube Types


Typical Volume

Gold Top Serum Separator Tube (SST)

⋜ 5 mL

Tiger Top Serum Separator Tube (SST)
^For larger volume tests

> 5 mL

Red Top Tube (No additive)

⋜ 5 mL

EDTA Whole Blood

3 mL

3.2 % Sodium Citrate Whole Blood

2.7 mL

Lithium Heparin Plasma Separator Tube

⋜ 5 mL