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90814: Thyroid Cancer (Thyroglobulin) Monitoring Print View
Thyroglobulin Antibody     IU/mL 

PRIMARY
1 Serum 2.3 (1.5) mL   Frozen - 28 Day(s)/Room Temperature - 6 Day(s)/Refrigerated - 7 Day(s)  
ALTERNATE

Measurement of thyroglobulin (Tg) is useful in the detection of residual or recurrent thyroid cancer. Many individuals develop auto-antibodies to Tg (Tg Ab) and the presence of Tg Ab interferes with the measurement of immunoassay Tg. It is therefore necessary to identify the presence/absence of Tg Ab before measuring Tg. The panel will first measure Tg Ab (Roche E170) an electrochemiluminescent assay and a highly sensitive test for the detection of endogenous anti-Tg antibodies. If the patient is Tg Ab negative, Tg will be measured using an immunoassay (Second Generation, Beckman Coulter)-also a highly sensitive assay with increased low-level sensitivity to 0.05 ng/mL. If the Tg Ab is positive, Tg will be measured by tandem mass spectroscopy. The LC/MS/MS assay will provide quantitative measurement of Tg in the presence of Tg Ab.
Setup Schedule
Monday-Friday

Reported (Analytical Time)
Same day

CPT Code
86800

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
Thyroglobulin Antibody, Electrochemiluminescence *Thyroglobulin, Second Generation (Beckman Coulter)* Thyroglobulin, LC/MS/MS If Thyroglobulin Antibody is negative, then Thyroglobulin is tested on the Beckman Coulter DxI (CPT code: 84432). If Thyroglobulin Antibody is positive then, Thyroglobulin is tested by LC/MS/MS (CPT code: 84432). METHODOLOGY for Thyroglobulin Antibody: Immunoenzymatic METHODOLOGY for Thyroglobulin, Second Gen: Chemiluminescence METHODOLOGY for Thyroglobulin, LC/MS/MS: LC/MS/MS Reject Criteria: Plasma, hemolyzed, icteric, or grossly lipemic specimen Transport Temperature: Room Temperature






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