Other unilateral secondary osteoarthritis of hip

This code signifies osteoarthritis affecting a single hip joint that develops as a consequence of another underlying condition or injury, rather than primary (idiopathic) osteoarthritis. It indicates degenerative changes in the hip cartilage and bone due to a secondary cause.

Apply this code when documentation specifies unilateral hip osteoarthritis with an identified secondary etiology, such as avascular necrosis, hip fracture sequelae, or developmental dysplasia of the hip. Ensure the medical record clearly distinguishes it from primary osteoarthritis and specifies laterality.

• Always confirm laterality (left or right) and the secondary nature of the osteoarthritis from the physician's documentation.
• Do not use this code for bilateral hip osteoarthritis; refer to codes within M16.5-M16.6.
• Sequence this code after the underlying condition (e.g., avascular necrosis) if it is still active and contributing to the osteoarthritis.