ICD-10-CM > M00-M99 > M86-M90 > M89 > M89.4 > M89.42 M89.42 Other hypertrophic osteoarthropathy, upper arm Non-Billable/Non-Specific Codes M89.421Other hypertrophic osteoarthropathy, right upper armM89.422Other hypertrophic osteoarthropathy, left upper armM89.429Other hypertrophic osteoarthropathy, unspecified upper arm