ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.5 > S31.55 S31.55 Open bite of unspecified external genital organs Non-Billable/Non-Specific Applicable To Bite of unspecified external genital organs NOS Type 1 Excludes superficial bite of unspecified external genital organs (S30.865, S30.866, S30.875, S30.876) Codes S31.551Open bite of unspecified external genital organs, maleS31.551A..., initial encounterS31.551D..., subsequent encounterS31.551S..., sequelaS31.552Open bite of unspecified external genital organs, femaleS31.552A..., initial encounterS31.552D..., subsequent encounterS31.552S..., sequela