12-Hour Fasting Required: NO
CPT Codes for this test: 86376, 86800
LabCorp's information for this test:
Thyroid Peroxidase (TPO) Ab; Thyroglobulin Antibody
This test may exhibit interference when sample is
collected from a person who is consuming a supplement with a high dose
of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R).
It is recommended to ask all patients who may be indicated for this test
about biotin supplementation. Patients should be cautioned to stop
biotin consumption at least 72 hours prior to the collection of a
Expected Turnaround Time
1 - 3 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for
testing to when the result is released to the ordering provider. In some cases, additional time should be
allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
0.8 mL (Note: This volume does not allow for repeat testing.)
Red-top tube or gel-barrier tube
Causes for Rejection
Plasma specimen; excessive hemolysis
Differential diagnosis of hypothyroidism and thyroiditis
See individual test descriptions.