T3 and T4 tests generally cost 60 to 70 yuan, and their prices are affected by the region, hospital, and testing methods, so it is recommended to go to a regular hospital for the test. T3 and T4 tests are often used together with TSH to understand thyroid function and diagnose hyperthyroidism and hypothyroidism, etc. A high T3 and T4 and a low TSH are often indicative of primary hyperthyroidism; a high T3, T4 and TSH are indicative of central hyperthyroidism; a low T3 and T4 and a high TSH are indicative of primary hypothyroidism; and a low T3, T4 and TSH are indicative of central hypothyroidism. The price of T3 and T4 tests is about 60 to 70 dollars, which may vary according to different regions, different hospitals and different testing methods. Generally, provincial hospitals have higher prices than county hospitals, and tertiary hospitals have higher prices than secondary hospitals. Refer to your local hospital for specific prices. Patients who need to check T3 and T4 are advised to consult their doctors.