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Thyroid Stimulating Hormone
Access Labcorp Draw · ZRT Laboratory2 test optionsFrom $20.62
Thyroid Stimulating Hormone
Access Labcorp Draw · ZRT LaboratoryCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
Thyroid-Stimulating Hormone is the main pituitary hormone signaling the thyroid gland. TSH is inversely associated with thyroid hormone production, so elevated TSH is associated with low thyroid hormone production and low TSH reflects elevated thyroid hormone production. TSH levels may be used as a screening for hypothyroidism or hyperthyroidism as well as monitoring medication usage. ZRT uses tighter ranges based on the Endocrine Society and Laboratory recommendations.
Additional test information
TSH is a pituitary hormone stimulating the thyroid gland to produce thyroid hormone. It is used to evaluate thyroid function and monitor hypothyroidism and hyperthyroidism with and without medication.
Collection and processing
- Sample type: Bloodspot
- Fasting: No
- Estimated laboratory processing: Results should arrive 8-10 business days after the lab receives samples.
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Bloodspot, Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should arrive 8-10 business days after the lab receives samples.. Timing can change after collection or if a laboratory requires additional review.
About this test
Thyroid-Stimulating Hormone is the main pituitary hormone signaling the thyroid gland. TSH is inversely associated with thyroid hormone production, so elevated TSH is associated with low thyroid hormone production and low TSH reflects elevated thyroid hormone production. TSH levels may be used as a screening for hypothyroidism or hyperthyroidism as well as monitoring medication usage. ZRT uses tighter ranges based on the Endocrine Society and Laboratory recommendations.
Additional details
TSH is a pituitary hormone stimulating the thyroid gland to produce thyroid hormone. It is used to evaluate thyroid function and monitor hypothyroidism and hyperthyroidism with and without medication.
Highlighted health areas
- Hormones
- Thyroid
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Thyroid-Stimulating Hormone, Dried Blood Spot