T4 FREE SERUM

General Information

HLAB/HOL Code: FT4
UPHSM LIS Test #: 870
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
Temperature: Refrigerate
Tube Type: 1 Red Top (Plain)
Collection Info:
Refrigerate specimen after collection.

Methods

Immunoassay

CPT Codes

84439

* 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

0.65 - 1.86 ng/dL