Multiple congenital exostoses

This code represents a genetic disorder characterized by the development of multiple benign bone tumors (osteochondromas or exostoses) that typically arise from the growth plates of long bones. These bony growths can cause pain, deformity, nerve compression, and restricted joint movement. The condition is also known as hereditary multiple exostoses (HME) or multiple osteochondromatosis.

Use this code for patients diagnosed with multiple congenital exostoses, confirmed by clinical examination and imaging studies (e.g., X-rays). Documentation should clearly indicate the presence of multiple osteochondromas with a congenital or hereditary etiology. This code is appropriate for initial diagnosis, follow-up, and management of complications related to the exostoses.

• Ensure documentation specifies "multiple" exostoses and indicates a congenital or hereditary origin to support this specific code.
• Do not confuse with solitary osteochondroma (D16.9) or acquired exostosis, which would be coded based on the specific anatomical site and etiology.
• Code any associated complications, such as nerve compression (e.g., G57.x), pathological fracture (M84.4x), or limb length discrepancy (M21.7x), as secondary diagnoses.