As tuberculosis becomes more prevalent; it’s showing up more often as a coding dilemma. One of the most common questions is if the PPD test should be charged separately and the answer is yes-sometimes. The reason is that when a skin test such as the one for tuberculosis is done, if the results are negative the test will be considered inconclusive for diagnosis; however if the results of the PPD test are positive, then you are opening the door for further visits from a physician and treatment for a condition. If you have no way of knowing the outcome of the test when you are compiling the medical billing, the …