ICD-10-CM > S00-T88 > S20-S29 > S21 > S21.9 > S21.95 S21.95 Open bite of unspecified part of thorax Non-Billable/Non-Specific Type 1 Excludes superficial bite of thorax (S20.97) Codes S21.95XA..., initial encounterS21.95XD..., subsequent encounterS21.95XS..., sequela