Osteopathy in diseases classified elsewhere, unsp forearm

This code signifies an unspecified osteopathic condition affecting the forearm, which is a manifestation or complication of another underlying disease process. It indicates a bone disorder in the forearm that is secondary to a systemic or localized illness, rather than a primary bone disease. The specific nature of the osteopathy is not documented.

Use this code when documentation clearly states an osteopathy of the forearm linked to another classified disease, but the specific type of osteopathy (e.g., hypertrophic, atrophic) is not specified. This code is appropriate when the physician explicitly diagnoses "osteopathy in diseases classified elsewhere, unspecified forearm" or similar phrasing, and the underlying condition is also documented.

• Always sequence the underlying disease first, as this code is for a manifestation of another condition.
• Avoid using this code if a more specific osteopathy of the forearm (e.g., M90.831 for right forearm, M90.832 for left forearm) or a more specific type of osteopathy is documented.
• Query the provider if the specific type of osteopathy or the affected side of the forearm is not documented, to allow for more precise coding.