ICD-10-CM > S00-T88 > S80-S89 > S81 > S81.8 > S81.85 S81.85 Open bite of lower leg Non-Billable/Non-Specific Applicable To Bite of lower leg NOS Type 1 Excludes superficial bite of lower leg (S80.86-, S80.87-) Codes S81.851Open bite, right lower legS81.851A..., initial encounterS81.851D..., subsequent encounterS81.851S..., sequelaS81.852Open bite, left lower legS81.852A..., initial encounterS81.852D..., subsequent encounterS81.852S..., sequelaS81.859Open bite, unspecified lower legS81.859A..., initial encounterS81.859D..., subsequent encounterS81.859S..., sequela