Other hypertrophic osteoarthropathy, right thigh

This code signifies a non-specific overgrowth of bone and soft tissue in the right thigh, not otherwise classified as primary or secondary hypertrophic osteoarthropathy. It indicates a localized or regional form of hypertrophic osteoarthropathy affecting the femur or surrounding soft tissues of the right upper leg.

This code is appropriate when documentation specifies hypertrophic osteoarthropathy affecting the right thigh, and the underlying cause (e.g., malignancy, chronic lung disease) is either unknown, not documented, or not the primary focus of the encounter. It should be used when the physician explicitly diagnoses "other hypertrophic osteoarthropathy" in this specific anatomical location.

• Always confirm laterality (right thigh) from the physician's documentation.
• Distinguish from primary hypertrophic osteoarthropathy (M89.40) and secondary hypertrophic osteoarthropathy (M89.41-M89.49) if a specific cause is identified.
• Code any underlying conditions or associated symptoms separately, if applicable and documented.