Thyroid-Stimulating Hormone (TSH)

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.