Follow the path to figure out if you can bill a Medicare service incident to the physician. Suppose your non-physician practitioner (NPP) sees a Medicare patient on a day when your physician is working, but is out of the office at lunch. Can you bill the service incident-to? The answer is no. Use this handy tool, created by Barbara Cobuzzi, MBA, CENTC, CPC-H, CPC-P, CPC-I, CHCC, president of CRN Healthcare Solutions, Tinton Falls, N.J. to help you determine when you can bill services incident-to and when you can't.