Transient synovitis, unspecified hip

This code represents a self-limiting inflammatory condition affecting the synovial membrane of the hip joint, characterized by joint pain and limping, typically without a clear infectious or traumatic cause. It is a common cause of acute hip pain in children.

Apply this code when documentation indicates a diagnosis of transient synovitis of an unspecified hip. This diagnosis is often made after ruling out more serious conditions like septic arthritis or Legg-Calvé-Perthes disease, based on clinical presentation, imaging (e.g., ultrasound showing joint effusion), and laboratory findings (e.g., normal inflammatory markers).

• Ensure the documentation specifies "unspecified hip" if laterality is not documented.
• Do not use this code if a specific cause for the synovitis (e.g., infection, trauma) is identified.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter.