Other hypertrophic osteoarthropathy, unspecified hand

This code describes a non-specific overgrowth of bone and soft tissue in the hand, not classified as primary or secondary hypertrophic osteoarthropathy. It indicates a generalized or localized enlargement of the hand's bony and periarticular structures due to an underlying, often unknown, cause.

Use this code when documentation specifies hypertrophic osteoarthropathy affecting the hand, but the specific type (e.g., primary, secondary) is not identified, or the laterality is not specified. This code is appropriate when the physician's diagnosis explicitly states "other hypertrophic osteoarthropathy of the hand" without further detail.

• Ensure documentation clearly states "hypertrophic osteoarthropathy" and specifies the hand as the affected site.
• Avoid using this code if a more specific type of hypertrophic osteoarthropathy (e.g., primary, secondary) or laterality (right/left) is documented; instead, choose a more precise code from the M89.4 subcategory.
• Query the provider for clarification if the type or laterality of the hypertrophic osteoarthropathy is not specified, to allow for more specific code assignment.