TEST DIRECTORY | MIDx Labs

THYROID STIMULATING HOMRONE (TSH)

Primary screening test to evaluate thyroid dysfunction.

LIS TEST CODE: TSH

CPT CODE: 84443

ALIASES: TSH, High Sensitivity-Thyroid Stimulating Hormone, Sensitive TSH (Thyroid-Stimulating Hormone), Thyrotropin, Ultra-Sensitive TSH (Thyroid Stimulating Hormone)

METHODOLOGY: Chemiluminescent Microparticle Immunoassay (CMIA)

SPECIMEN:

- Type: Serum

- Container: Gold Top (SST) Vacutainer

- Minimum Volume Required: 1 mL

- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen in the refrigerator or in the freezer until testing can be performed.

NOTE: If freezing is required to preserve stability, transfer serum into a separate plastic screw-cap transport container.

- Stability:

Room Temperature (20-25 °C): Not Accepted

Refrigerated (2-8 °C): 7 days

Frozen (-20 °C or colder): 6 months; avoid multiple freeze/thaw cycles.

- Turnaround Time: 24 hours from receipt.

Special Instructions: N/A

REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

REFERENCE RANGES:

Males & Females (uIU/mL)

1 - 5 years of age: 0.70 - 6.00

6 - 10 years of age: 0.60 - 4.80

11 - 19 years of age: 0.50 - 4.30

>= 20 years of age: 0.30 - 4.20