Unilateral osteoarth resulting from hip dysplasia, unsp hip

This code signifies osteoarthritis affecting a single hip joint, where the underlying cause is congenital hip dysplasia. The specific laterality (left or right) of the affected hip is not documented or is unknown. This condition involves the progressive degeneration of articular cartilage due to abnormal hip joint development.

Use this code when documentation clearly states unilateral osteoarthritis secondary to hip dysplasia, but does not specify which hip is affected. This is appropriate when the physician's notes indicate "osteoarthritis of the hip due to dysplasia" without further laterality. It is also applicable when the laterality is known but not explicitly documented in the current encounter.

• Do not use this code if the laterality (left or right hip) is specified in the medical record; instead, use the more specific M16.31 or M16.32.
• Ensure documentation explicitly links the osteoarthritis to a history or diagnosis of hip dysplasia.
• This code is for primary diagnosis or as a secondary diagnosis when the osteoarthritis is being treated.