This is from the NCCI Policy Manual, Chapter IV Musculoskeletal, Section F, #14: If a single cast, strapping, or splint treats multiple closed fractures without manipulation, only one closed fracture treatment without manipulation CPT code may be reported. Additionally, if a single cast, strapping, or splint treats multiple fractures without manipulation in addition to one or more fracture(s) with manipulation, a closed fracture without manipulation CPT code should not be reported separately. These policies also apply to the closed treatment of multiple fractures not requiring application of a cast, strapping, or splint.
You stated that this patient is Medicare, so based on the NCCI policy manual Medicare will not pay for more than one rib fracture.