Sign in →

Test Code T4T T4 (Thyroxine), Total, Serum

Important Note

This test does not include Free T4 (order separately)


Chemiluminescence Immunoassay

Performing Laboratory

Munson Medical Center Laboratories

Specimen Requirements

Specimen must arrive within 24 hours of collection.


Container/Tube: Gold-top serum gel tube.  

Microcontainer with serum gel separator is also acceptable.

Specimen Volume: 0.5 mL of serum
Transport Temperature: Refrigerate
Collection Instructions: Forward promptly.

Note: 1. Medicare diagnosis limitations exist for this test. Click on link for list of medically necessary diagnoses:  See Advance Beneficiary Notice of Noncoverage (ABN) form in Special Instructions.

Reference Values

6.1 - 12.2 ug/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding