T3 (TRIIODOTHYRONINE) TOTAL SERUM / PLASMA

General Information

HLAB/HOL Code: T3R
UPHSM LIS Test #: 764
Schedule: Daily
Testing Time: 1 day
Testing Lab: UP Health System-Marquette

Specimen Info
Only 1 specimen type required, unless otherwise specified

Volume: 0.5 mL serum
Temperature: Refrigerate
Tube Type: 1 SST Tube
Collection Info:
Centrifuge and refrigerate specimen after collection.  EDTA or Heparinized Plasma are also acceptable.

Methods

Immunoassay

Clinical Utilities

Thyroid function test, particularly useful in the diagnosis of T3 thyrotoxicosis and confirmation of hyperthyroidism. Needed in patients with clinical evidence for hyperthyroidism, in whom thyroid profile is normal or borderline.�

CPT Codes

84480

* The CPT codes provided 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 payer being billed.

Reference Range

0.97 - 1.69 ng/mL