ICD-10-CM > M00-M99 > M80-M85 > M85 > M85.1 > M85.12 M85.12 Skeletal fluorosis, upper arm Non-Billable/Non-Specific Codes M85.121Skeletal fluorosis, right upper armM85.122Skeletal fluorosis, left upper armM85.129Skeletal fluorosis, unspecified upper arm