Monoarthritis, not elsewhere classified, left hip

This code signifies inflammation affecting a single joint, specifically the left hip, that is not attributable to a more specific underlying condition such as gout, rheumatoid arthritis, or infectious arthritis. It indicates a localized inflammatory process within the left hip joint without a definitive systemic or infectious etiology.

Use this code when documentation clearly states monoarthritis of the left hip and explicitly rules out other specific causes. This is appropriate for cases where diagnostic workup (e.g., synovial fluid analysis, serology) has not identified a more precise diagnosis, or when the provider has documented "monoarthritis, not otherwise specified" of the left hip.

• Ensure documentation specifies "left hip" and "monoarthritis."
• Do not use if a more specific cause of monoarthritis (e.g., gout, infectious arthritis) is identified; instead, code the specific condition.
• Review the medical record for any associated systemic conditions that might explain the monoarthritis, as these would take precedence.