Test Directory

Test Code
ATPO
Test Name
Thyroid Peroxidase AutoAb
CPT Codes
86376
Expected Turnaround Time
1 day
Clinical Utility

Useful in the differential diagnosis of hypothyroidism and thyroiditis.

Specimen and Container Info

Specimen Type: Serum

Preferred Collection Container: Gold Top, Serum Separator

Minimum Acceptable Volume: 0.6 mL

Processing and Submission Instructions

Separator tubes: Contains clot activator and gel for separating serum from cells, but not anticoagulant. Separate serum from cells as soon as the clot has formed (30 minutes). If specimen is centrifuged before clotting is complete, a fibrin clot will form on top of the cell. This may cause the gel barrier to not be intact and could cause improper separation of serum and cells, possibly affecting test results.

Transport Instructions

Transport to the laboratory refrigerated.

Stability Requirements

Refrigerated

48 hours

Frozen

One month

Freeze/Thaw Cycles

Three freeze/thaw cycles

Methodology
Chemiluminescent Immunoassay
Reference Intervals
Performing Location
Roble Road Core Laboratory
Testing Schedule
Routine, daily