ICD-10-CM > S00-T88 > S90-S99 > S91 > S91.1 > S91.15 > S91.159 S91.159 Open bite of unspecified toe(s) without damage to nail Non-Billable/Non-Specific Codes S91.159A..., initial encounterS91.159D..., subsequent encounterS91.159S..., sequela