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Test Code BLOD0315 Thyroid Peroxidase Antibodies (TPO)

Useful For

  • Aiding in the diagnosis of thyroid autoimmune disorders
  • Differentiating thyroid autoimmune disorders from nonautoimmune goiter or hypothyroidism
  • As a diagnostic tool in deciding whether to treat a patient who has subclinical hypothyroidism



Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Serum or Plasma
Container/Tube: Red top, gold top, or light green top (lithium heparin)
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Collection Instructions: If there is a delay in transport of >48 hours, freeze specimen in plastic vial, and send specimen frozen.

Specimen Transport Temperature

Ambient <8 hours/Refrigerated >8 hours/Frozen >48 hours

Specimen Stability

Specimen Type Temperature Time
Serum or Plasma Ambient 8 hours
  Refrigerated 48 hours
  Frozen 1 month


Reference Values

28.0-60.0 IU/mL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding