M91.8Other juvenile osteochondrosis of hip and pelvis

M91.8 is the ICD-10-CM diagnosis code for other juvenile osteochondrosis of hip and pelvis. It belongs to category M91 (juvenile osteochondrosis of hip and pelvis), block M91-M94 (Chondropathies) 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 M91, choose M91.8 (Other juvenile osteochondrosis of hip and pelvis) only when documentation doesn't support a more specific option: juvenile osteochondrosis of pelvis (M91.0), juvenile osteochondrosis of head of femur [Legg-Calve-Perthes] (M91.1), coxa plana (M91.2), Pseudocoxalgia (M91.3), coxa magna (M91.4) and unspecified (M91.9).

To report this condition, pick the subcode that matches the documentation: M91.80 (unspecified leg), M91.81 (right leg) and M91.82 (left leg).

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