ICD-10-CM > M00-M99 > M80-M85 > M85 > M85.1 > M85.16 M85.16 Skeletal fluorosis, lower leg Non-Billable/Non-Specific Codes M85.161Skeletal fluorosis, right lower legM85.162Skeletal fluorosis, left lower legM85.169Skeletal fluorosis, unspecified lower leg