ICD-10-CM > S00-T88 > S50-S59 > S51 > S51.8 > S51.85 S51.85 Open bite of forearm Non-Billable/Non-Specific Applicable To Bite of forearm NOS Type 1 Excludes superficial bite of forearm (S50.86, S50.87) Codes S51.851Open bite of right forearmS51.851A..., initial encounterS51.851D..., subsequent encounterS51.851S..., sequelaS51.852Open bite of left forearmS51.852A..., initial encounterS51.852D..., subsequent encounterS51.852S..., sequelaS51.859Open bite of unspecified forearmS51.859A..., initial encounterS51.859D..., subsequent encounterS51.859S..., sequela