Test Code TPOAB 
Methodology Enzyme-Linked Immunosorbent Assay (ELISA) 
Description Useful for diagnosing and managing a variety of thyroid disorders, including autoimmune thyroiditis, Hashimoto's thyroiditis, Graves' disease, certain types of goiter, and polyendocrine auto-immunopathies. 
Specimen Draw blood in a plain red-top tube or serum gel tube. Spin down and send 1.0 mL (minimum: 0.5mL) of serum refrigerated in a screw-capped, plastic vial. If specimen will not arrive within 2 days of draw, send specimen FROZEN in plastic vial on dry ice. 
Reference Values Negative: 0-100 units
Positive: >100 units

A negative result indicates no thyroid peroxidase antibody or levels below the negative cut-off of the assay. A positive result indicates the presence of thyroid peroxidase antibodies and suggests the possibility of Hashimoto's Thyroiditis and/or Graves' Disease. 

Analytic Time 1 Day 
Day(s) Test Set Up Tuesday, Thursday 
CPT Code(s) 86376