Question: When is it appropriate to use anesthesia code CPT 01230 versus 01210? Nebraska Subscriber Answer: Codes 01210 (Anesthesia for open procedures involving hip joint; not otherwise specified) and 01230 (Anesthesia for open procedures involving upper two-thirds of femur; not otherwise specified) seem similar at first glance, but represent different areas. Code 01210 involves the hip joint and 01230 involves the upper two-thirds of the femur. Get a copy of the surgeon's operative report if you need more details to identify the specific area.