Surgeons use ICD.9 codes to identify what the disease/ pathology of each patient is for the insurance companies. The CPT codes refer to the surgery itself and what was done. Typically, the ICD.9 codes need to match the CPT codes. For instance, a foot disease ICD.9 code does not match a spine CPT surgery code; in this instance the insurance company will deny the surgery or payment of the surgery. Matching the appropriate ICD.9 codes with CPT codes is important for all physicians.