Other hypertrophic osteoarthropathy, unspecified site

This code signifies a diagnosis of hypertrophic osteoarthropathy that is not specified as primary or secondary, and where the specific anatomical location of the condition is not documented. Hypertrophic osteoarthropathy is characterized by periostitis, clubbing of digits, and arthralgia, often associated with underlying systemic diseases.

Use this code when the medical record clearly indicates a diagnosis of hypertrophic osteoarthropathy, but the provider has not specified whether it is primary or secondary, nor has a specific site (e.g., finger, wrist) been identified. This code is appropriate when the documentation is insufficient to assign a more specific code within the M89.4 category.

• Avoid using this code if the documentation specifies primary (M89.41-) or secondary (M89.42-) hypertrophic osteoarthropathy.
• Always query the provider for clarification on the type and site of hypertrophic osteoarthropathy to allow for more specific coding.
• This code should be used as a last resort when no further specificity can be obtained from the medical record or provider.