M89.4Other hypertrophic osteoarthropathy

M89.4 is the ICD-10-CM diagnosis code for other hypertrophic osteoarthropathy. It belongs to category M89 (other disorders of bone), block M86-M90 (other osteopathies) 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 10 subcodes must be used instead.

Within M89, choose M89.4 (Other hypertrophic osteoarthropathy) only when documentation doesn't support a more specific option: Algoneurodystrophy (M89.0), physeal arrest (M89.1), development and growth (M89.2), hypertrophy of bone (M89.3), osteolysis (M89.5), osteopathy after poliomyelitis (M89.6), major osseous defect (M89.7), other specified disorders of bone (M89.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: M89.40 (unspecified site), M89.41 (shoulder), M89.42 (upper arm), M89.43 (forearm), M89.44 (hand), M89.45 (thigh), M89.46 (lower leg), M89.47 (ankle and foot) and 2 more.

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