Test Overview
Test Methodology

Chemiluminescence Immunoassay (immunoenzymatic)

Test Usage

Aid in detection and confirmation of autoimmune thyroiditis and to distinguish from other causes of goiter, such as Hashimoto's thyroiditis and juvenile lymphocytic thyroiditis. A negative test for thyroid peroxidase antibodies (ATPO) and thyroglobulin antibodies essentially rules out a diagnosis of Hashimoto's thyroiditis.

Reference Range *

0 - 3 IU/mL

Test Limitations

Patients with other autoimmune disorders such as Sjogren's syndrome, SLE, RA, or autoimmune hemolytic anemia may be positive for thyroid antibodies. Patients with myxedema, granulomatous thyroiditis, nontoxic nodular goiter and thyroid carcinoma may occasionally produce thyroid antibodies.

Test Details
Days Set Up
Monday, Thursday
Analytic Time

8 hours

Soft Order Code
ATG
MiChart Code
Thyroglobulin Antibody
Synonyms
  • THYROID THYROGLOBULIN AB
  • Thyroid Antibody
  • THY
  • Antithyroglobulin Antibody
  • THYRGLB AB
  • Thyroglobulin Antibody
  • ATG
  • THYROID ANTIBODIES
Laboratory
Chemical Pathology
Section
Special Chemistry
Specimen Requirements
Collection Instructions

Collect specimen in SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate. Store refrigerated up to 48 hours. Longer storage requires freezing at -20 degrees C.

Alternate Specimen
Red top tube.
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.2 mL serum
Billing
CPT Code
86800
Fee Code
21921
LOINC
56536-6
NY State Approved
No