Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB3158             Geisinger Epic ID: 45852

Specimen type:
Preferred collection container:
Alternate Collection Container:
Gold-top (serum separator) microcollection tube
6 mL red-top (plain, non-serum separator) tube
Specimen required:
One (1) full 3.5 mL gold-top serum separator tube. Aliquot also acceptable (0.5 mL minimum).

Specimen processing instructions:
Allow serum to clot. Centrifuge to separate serum within 2 hours of collection. 
Transport temperature:
Refrigerated. Frozen acceptable but not preferred.
Specimen stability:
Refrigerated: 3 days. Frozen: 1 month.
Rejection criteria:
Stability limit exceeded.

Reference interval:
Less than 115 IU/mL.
CPT code(s):
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Thyroglobulin autoantibody value.
Chemiluminescence Immunoassay
Thyroglobulin antibody
Clinical significance:
Autoantibodies to thyroglobulin (TG autoantodies) are often present in patients with autoimmune thyroid disease. Approximately 10 percent of healthy individuals have TG autoantibodies at low levels; higer concentrations are found in 30 and 85 percent of patients with Graves' disease and Hashimoto's thyroiditis, respectively. TG autoantibody measurements are most useful for evaluating samples submitted for thyroglobulin measurements because TG autoantibodies can interfere with both competitive immunoassays and immunometric assays for thyroglobulin.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 12/14/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Megan Woodruff
Frequency: Daily, all shifts
Performed STAT? No
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