TSH

Test Code

LAB129

Alias/See Also

1231100281

CPT Codes
84443

Includes

THYROID STIMULATING HORMONE

Preferred Specimen

Green Lithium Heparin tube (Gel separator preferred)

Minimum Volume

0.5 mL plasma

Instructions

CLINIC COLLECTIONS: Collect 0.5 mL plasma in Green Lithium Heparin tube (Gel separator preferred). Must be spun within 2 hours after collection. If no gel separator, plasma must be pulled off cells within 2 hours.

If collecting with AST, ALT, VD25, K+, or LDH, label routes to Gold/SST. Collect 1.0 mL of serum in Gold/SST. Must be spun within 2 hours after collection.

Specimen Stability

Refrigerated (2°C to 8°C): 7 days
Freezer (-10°C or colder): 6 months
If testing will be delayed more than 24 hours, remove serum or plasma from the clot, red blood cells, or separator gel.

Methodology
Abbott Alinity

Reference Range

Males/Females:
0-12 Years: 0.640-6.270 uIU/mL
12-18 Years: 0.520-4.940 uIU/mL
Adults: 0.350-4.940 uIU/mL

Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY LABORATORY

Last Updated: August 31, 2026

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.