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30551: Tsi (thyroid Stimulating Immunoglobulin) Print View
TSI   < 140  % baseline 

PRIMARY
1 Serum 1 (0.2) mL   Frozen - 60 Day(s)/Refrigerated - 21 Day(s)  
ALTERNATE

Graves disease is a classic form of hyperthyroid disease, affecting approximately 0.4% of the population in the United States. It is caused by IgG immunoglobulins, collectively known as thyroid stimulating immunoglobulins (TSI). Patients who are candidates for antithyroid drug therapy may not respond to this treatment when TSI levels are markedly elevated. The determination of TSI can also assist in predicting hyperthyroidism in neonates due to placental transmission of the immunoglobulins from mother with a hyperthyroidism.
Setup Schedule
Tuesday-Saturday

Reported (Analytical Time)
Next day

CPT Code
84445

The CPT codes provided 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 payer being billed.

Notes
Reject Criteria: Gross hemolysis; grossly lipemic; received room temperature; grossly icteric
Transport Temperature: Refrigerated
Methodology: In Vitro Bioassay






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