M89.329
ICD-10-CMThis code signifies an abnormal enlargement or overgrowth of bone tissue within the humerus, the long bone of the upper arm, when the specific type of hypertrophy is not documented. It indicates a structural change in the bone's size or density without specifying the underlying cause or nature of the overgrowth.
Apply this code when medical record documentation clearly states "hypertrophy of the humerus" without further specification regarding the type (e.g., osteosclerosis, osteophytosis) or laterality. This code is appropriate when imaging reports or physician notes describe bone overgrowth in the humerus but lack the detail to assign a more specific code.
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