ICD-10-CM > S00-T88 > S90-S99 > S91 > S91.1 > S91.15 > S91.156 S91.156 Open bite of unspecified lesser toe(s) without damage to nail Non-Billable/Non-Specific Codes S91.156A..., initial encounterS91.156D..., subsequent encounterS91.156S..., sequela