Doctors and healthcare professionals can perform a PPD skin test to test for TB ... and once you pay this amount, you need to pay a 20% coinsurance for eligible services. However, Medicare ...

TST involves injecting a small amount of purified protein derivative (PPD) tuberculin into the skin, typically on the forearm. The test relies on the immune system's reaction to the injected ...

For the skin test, a small amount of tuberculosis proteins is injected under the skin. Two or three days later the doctor will check for a raised bump that indicates infection. With either option ...