Other hypertrophic osteoarthropathy, unsp ankle and foot

This code signifies a non-specific form of hypertrophic osteoarthropathy affecting an unspecified ankle or foot. Hypertrophic osteoarthropathy is characterized by abnormal bone and soft tissue proliferation, often presenting with clubbing of digits, periostosis, and arthralgia. This particular code is used when the specific type of hypertrophic osteoarthropathy is not documented, and the affected ankle or foot is not specified as right or left.

Apply this code when medical record documentation indicates hypertrophic osteoarthropathy of the ankle or foot, but the physician has not specified the laterality (right or left) and has not identified a more specific type (e.g., primary, secondary, or localized). This code is appropriate when the clinical picture aligns with general hypertrophic osteoarthropathy in this region, and further specificity is lacking.

• Avoid this code if laterality (right or left ankle/foot) is documented; instead, use the more specific M89.471, M89.472, or M89.473.
• Query the provider for more specific documentation regarding the type of hypertrophic osteoarthropathy (e.g., primary, secondary) and laterality if possible.
• Do not use this code for isolated clubbing of digits without other features of hypertrophic osteoarthropathy.