What is the CPT code for a thyroid function test?

The CPT code for a thyroid function test is 84443, which specifically refers to the measurement of Thyroid Stimulating Hormone (TSH). This test is a critical component in assessing thyroid function and diagnosing conditions such as hypothyroidism and hyperthyroidism.

Thyroid function tests may also include the measurement of other hormones and elements, such as total thyroxine (T4) or triiodothyronine (T3), but 84443 explicitly denotes the TSH test. By using this code, healthcare providers and coders ensure accurate documentation and billing for laboratory services associated with the evaluation of thyroid health.