ICD-10-CM > S00-T88 > S00-S09 > S01 > S01.5 > S01.55 S01.55 Open bite of lip and oral cavity Non-Billable/Non-Specific Codes S01.551Open bite of lipS01.551A..., initial encounterS01.551D..., subsequent encounterS01.551S..., sequelaS01.552Open bite of oral cavityS01.552A..., initial encounterS01.552D..., subsequent encounterS01.552S..., sequela