Other hypertrophic osteoarthropathy, right upper arm

This code signifies a non-specific overgrowth of bone and soft tissue in the right upper arm, not otherwise classified as primary or secondary hypertrophic osteoarthropathy. It indicates an abnormal proliferation of bone and periosteum, often accompanied by clubbing of digits and joint pain, affecting the humerus or surrounding structures.

Apply this code when documentation specifies hypertrophic osteoarthropathy affecting the right upper arm, and the specific type (e.g., primary, secondary to lung disease) is not identified or is considered "other." This code is appropriate when the physician explicitly diagnoses "other hypertrophic osteoarthropathy" localized to the right upper arm.

• Ensure the documentation clearly specifies the right upper arm; laterality is crucial for accurate coding.
• Differentiate from M89.40 (unspecified site) or M89.48 (other site) by confirming the specific anatomical location.
• Look for associated conditions that might indicate a secondary form of hypertrophic osteoarthropathy, which would require a more specific code if identified.