Since medical coding is ultimately converting medical conditions and procedures into either numeric or alphanumeric codes, a strong background in anatomy and physiology is obviously crucial for success. An understanding of the structures and functions of the human body will likewise offer a better understanding of the diagnostic and procedural codes that are associated with them. For this reason, most medical billing and coding programs include an A&P section, as do most certification exams. Luckily, there are some great refreshers out there and we're here to share them with you!