aka TSH · Thyroid Stimulating Hormone · Thyrotropin · LOINC:3016-3
Primary screening test for thyroid function. Elevated TSH indicates hypothyroidism, low TSH indicates hyperthyroidism.
No fasting required. Best done in the morning. Take thyroid medications after blood draw. Stop biotin 2 days before.
Normal ranges may vary between labs. Always consult your doctor for interpretation.