Antithyroglobulin Antibody and Antithyroid Peroxidase Antibody



Thyroid antibodies, antithyroid peroxidase antibodies (thyroid peroxidase [TPO] antibodies were previously called thyroid antimicrosomal antibodies).


To assist in diagnosing hypothyroid and hyperthyroid disease.

Patient Preparation

There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings

Method: Chemiluminescent immunoassay.

AntibodyConventional Units
Antithyroglobulin antibodyLess than 4 international units/mL
Antiperoxidase antibodyLess than 9 international units/mL
Values vary by method and the testing laboratory should be consulted for corresponding ranges.

Critical Findings and Potential Interventions


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