CDOS

Thyroglobulin Antibody and Thyroglobulin, IMA or LC/MS-MS

Test Code: 042045

Performing Lab: LabCorp

CPT Code: 86800 001

Test Link (Copy)

Specimen Type

Serum

Specimen Container

Red-top tube or gel-barrier tube

Volume

3 mL (two tubes, 1.5 mL each tube)

Minimum Volume

2 mL (two tubes, 1 mL each tube) (NOTE: This volume does NOT allow for repeat testing).

Specimen Handling

Separate serum from cells, and transfer specimen to a plastic transport tube.

Temperature

Room temperature

Methodology

TgAb: Beckman Coulter immunometric assay Tg-IMA: Beckman Coulter immunometric assay Tg Liquid chromatography/tandem mass spectrometry (LC-MS/MS) lab-developed test. Both Tg assays are calibrated against CRM-57 international standard for Tg as recommended in recent guidance documents.[1] LabCorp uses a dual Tg strategy in an effort to eliminate the potential effect of TgAb interference on Tg analysis. All specimens are initially assayed for TgAb by the highly sensitive Beckman Coulter IMA. Samples with TgAb below the detectable limit are assayed for Tg by a sensitive second-generation IMA (Beckman Coulter) with a relatively rapid turnaround time. Specimens with any measurable levels of TgAb are assayed by a sensitive LC-MS/MS method.

Stability

Room Temperature: 7 days
Refrigerated: 7 days
Frozen: 14 days

Result Code	Result Name	LOINC
006706	Thyroglobulin Antibody	8098-6
006706	Thyroglobulin Antibody	8098-6
166013	Thyroglobulin Storage	UNLOINC

Reflex Order Code	Reflex Order Name
006705	Thyroglobulin by IMA
070121	Thyroglobulin by LCMS
006705	Thyroglobulin by IMA
070121	Thyroglobulin by LCMS

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