ICD-10-CM > S00-T88 > S50-S59 > S51 > S51.8 > S51.80 S51.80 Unspecified open wound of forearm Non-Billable/Non-Specific Codes S51.801Unspecified open wound of right forearmS51.801A..., initial encounterS51.801D..., subsequent encounterS51.801S..., sequelaS51.802Unspecified open wound of left forearmS51.802A..., initial encounterS51.802D..., subsequent encounterS51.802S..., sequelaS51.809Unspecified open wound of unspecified forearmS51.809A..., initial encounterS51.809D..., subsequent encounterS51.809S..., sequela