Days Set Up
Monday, Thursday
Analytic Time

8 hours

MiChart Code
Thyroid Peroxidase IgG Ab
Soft Order Code

Test Updated:


Thyroid Antibody
TPO Antibodies, Serum
Thyroid Peroxidase Autoantibodies
Peroxidase Antibody
Microsomal Antibody
Thyroperoxidase Ab, Serum
Thyroid Peroxidase Antibodies
Thyroperoxidase Antibodies

Looking to order a test?

We’ve provided helpful links to make ordering easy.

Find a Requisition

All specimens should be accompanied by a requisition.

Submitting Specimens

Learn about how to properly label and where to ship specimens.

Order Kits and Supplies

MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

Visit our provider FAQ and learn about common questions to ordering tests.

Test Overview

Test Methodology

Chemiluminescent Immunoassay

Test Usage

Autoantibodies to thyroid peroxidase (TPO), which is the major antigen of thyroid microsomes, can be detected in the serum of patients with autoimmune thyroid disease (e.g., Hashimoto, Graves) and predict elevated serum TSH concentrations.

Reference Range

< 30 U/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Offsite Collection Instructions

Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and freeze.

Red Top Tube
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.4 mL serum

Billing Information

CPT Code
Pro Fee Code
Insurance Auth Info

Have More Questions?

Explore our helpful billing resources:

Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.