TSH

Message

If TSH is less than 0.35 OR greater than 5.00 the Lab will add a reflex Free T4.

Test Code

TSH

Alias/See Also

Thyroid Stimulating Hormone
Chemistry

Preferred Specimen

Gold Top Tube

Other Acceptable Specimens

Light Green Top Tube

Transport Temperature

Refrigerate

Specimen Stability

Room temperature: 24 hours
Refrigerated (2-8°C): 7 days. Separate if not tested within this time.
Frozen (-10°C or colder): 6 months

Methodology
Chemiluminescent microparticle immunoassay

Setup Schedule

M-F

Report Available

TAT 1 - 5 days

Reference Range

0.35 – 5.0 uIU/mL

Clinical Significance

For differential diagnosis of primary, secondary, and tertiary hypothyroidism. Also useful in screening for hyperthyroidism. This assay allows adjustment of exogenous thyroxine dosage in hypothyroid patients and in patients on suppressive thyroxine therapy for thyroid neoplasia.

Performing Laboratory
Test performed in BACL Chemistry Labs
Contact: Jonathan Dryjowicz-Burek, West Roxbury 857-203-5973
Alternate contact Diane Robert BR 774-826-2294
Alternate contact Bhumikaben Patel Bedford 781-687-2976

Last Updated: August 6, 2021

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.