ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.8 > S31.80 > S31.805 S31.805 Open bite of unspecified buttock Non-Billable/Non-Specific Applicable To Bite of buttock NOS Type 1 Excludes superficial bite of buttock (S30.870) Codes S31.805A..., initial encounterS31.805D..., subsequent encounterS31.805S..., sequela