APC (Ambulatory Payment Classification) references on wikipedia
APC_(Ambulatory_Payment_Classification) APCs or Ambulatory Payment Classifications are the government's method of paying for facility outpatient services for the Medicare (United States) program. A part of the Federal Balanced Budget Act of 1997 made the Centers for Medicare and Medicaid Services create a new Medicare "Outpatient Prospective Payment System" (OPPS) for hospital outpatient services -analogous to the Medicare prospective payment system for hospital inpatients known as Diagnosis-related group or DRGs.