Thyroid-Stimulating Hormone (TSH) Reflex, Free T4, Serum

Test Code

TSHR

CPT Codes
84443

Preferred Specimen

Draw blood in a plain, red-top tube. Spin specimen down and send
1 mL of serum.

Transport Temperature

Refrigerate up to 7 days/Frozen OK

Methodology
Immunometric

Setup Schedule

Monday through Sunday

Reference Range

If TSH is <0.49 mIU/mL or >4.67 mIU/mL, a FRT4 T4,
Free, Serum is reflexively ordered.

Performed By
North Mississippi Medical Center Pathology Department

Performing Laboratory
NMMC Pathology Department

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.