TSH

Test Code: 
899 - TSH
36127 - TSH with Reflex to FT4
90896 - TSH, Pregnancy

CPT Code(s): 
Test Code 899: 84443
Test Code 36127: 84443
Test Code 90896: 84443

Supply: 170739 RedGrey SST 8.5mL

Includes: 
Test Code 899: TSH
Test Code 36127: For patients 1 year of age or older, Free T4 will be performed at an additional charge (CPT code(s): 84439) when TSH result exceeds age/gender specific reference range.
Test Code 90890: TSH

Methodology: Immunoassay

Clinical Significance: 
Test Codes 899 & 36127: 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.

Test Code 90896: TSH levels are lower during pregnancy, especially during the 1st trimester. Based on recent clinical studies which have shown that even mildly elevated TSH during pregnancy is associated with adverse pregnancy outcomes, the American Thyroid Association has released clinical guidelines which recommend the use of assay-specific and trimester-specific reference intervals.

Additional names: 
Test Code 899: Highly Sensitive TSH; TSH, Highly Sensitive; 9/9/96-CHGD Field 25-Bac; 2nd Generation TSH; Thyrotropin; 3rd Generation TSH; Hypersensitive TSH; PEDS TSH; Supersensitive TSH; Thyroid Stimulatin Hormone; TSH3; TSH Highly Sensitive; TSH Ultra-Sensitive; TSH, Delta, Single Specimen; TSH, Psychiatric, Single Specimen

Test Code 36127: Thyrotropin; 3rd Generation TSH; Thyroid Function; Thrrotropin w/ reflex to FT4; TSH Ultrasensitive; TSH w/FT4 Reflex; TSH w/RFX; Ultra TSH w/Rfx to Free T4

Test Code 90896: Pregnancy TSH