Reiter's disease, unspecified hip

This code represents an inflammatory arthropathy, specifically Reiter's disease (now often referred to as reactive arthritis), affecting an unspecified hip joint. Reiter's disease is characterized by a triad of arthritis, urethritis, and conjunctivitis, often triggered by a prior infection. This particular code indicates the involvement of the hip without specifying laterality.

Use this code when documentation confirms a diagnosis of Reiter's disease with involvement of the hip joint, and the medical record does not specify whether it is the right or left hip. This code is appropriate when the physician explicitly states "Reiter's disease of hip, unspecified" or similar phrasing.

• Avoid using this code if laterality (right or left hip) is documented; instead, use the more specific codes for right (M02.351) or left (M02.352) hip involvement.
• Ensure the documentation clearly links the hip arthritis to Reiter's disease, rather than other forms of inflammatory or degenerative arthritis.
• Consider sequencing this code after any codes for the underlying infection, if known and still active, that triggered the reactive arthritis.