Geisinger Medical Laboratories Test Catalog

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


Geisinger Epic Procedure Code: LAB3160             Geisinger Epic ID: 19785

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 (preferred) or frozen.
Specimen stability:
Refrigerated: 3 days. Frozen: 1 month.
Rejection criteria:
Stability limit exceeded.

Reference interval:
Less than 34 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:
Thyroid peroxidase antibody value.
TPAB, Thyroid Microsomal Antibody
Thyroid peroxidase antibody
Antimicrosomal antibodies
TPO autoantibody
Thyroperoxidase antibody
Clinical significance:
The major thyroid autoimmune diseases are Hashimoto's thyroiditis and Graves' disease. In virtually all cases of Hashimoto's disease and in the majority of cases of Graves' disease cases, TPO autoantibodies are elevated. High levels of TPO autoantibodies in the context of hypothyroidism confirm the diagnosis of Hashimoto's disease.
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
Performed STAT? No
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