ICD-10-CM > M00-M99 > M80-M85 > M85 > M85.1 > M85.13 M85.13 Skeletal fluorosis, forearm Non-Billable/Non-Specific Codes M85.131Skeletal fluorosis, right forearmM85.132Skeletal fluorosis, left forearmM85.139Skeletal fluorosis, unspecified forearm