M05.45Rheumatoid myopathy with rheumatoid arthritis of hip

M05.45 is the ICD-10-CM diagnosis code for rheumatoid myopathy with rheumatoid arthritis of hip. It belongs to category M05 (rheumatoid arthritis with rheumatoid factor), block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within M05.4 (rheumatoid myopathy with rheumatoid arthritis), M05.45 is specifically for rheumatoid myopathy with rheumatoid arthritis of hip. Related codes cover of unspecified site (M05.40), of shoulder (M05.41), of elbow (M05.42), of wrist (M05.43), of hand (M05.44), of knee (M05.46), of ankle and foot (M05.47) and of multiple sites (M05.49).

To report this condition, pick the subcode that matches the documentation: M05.451 (hip), M05.452 (hip) and M05.459 (hip).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.