Certified Professional Coder (CPC) CPC the mandatory AAPC certification for any budding Medical Coding Professional to acquire in-depth knowledge in terms of Human Anatomy, Physiology, ICD – 10 CM (International Classification of Disease), CPT (Current Procedural Terminology), HCPCS Level II (Healthcare Common Procedure Coding System),and one could also become well equipped with the right knowledge on how to go about applying these codes.