ICD-10-CM > M00-M99 > M60-M63 > M61 > M61.3 > M61.33 M61.33 Calcification and ossification of muscles associated with burns, forearm Non-Billable/Non-Specific Codes M61.331Calcification and ossification of muscles associated with burns, right forearmM61.332Calcification and ossification of muscles associated with burns, left forearmM61.339Calcification and ossification of muscles associated with burns, unspecified forearm