ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.8 > S31.83 > S31.835 S31.835 Open bite of anus Non-Billable/Non-Specific Applicable To Bite of anus NOS Type 1 Excludes superficial bite of anus (S30.877) Codes S31.835A..., initial encounterS31.835D..., subsequent encounterS31.835S..., sequela