ICD-10-CM > S00-T88 > S00-S09 > S01 > S01.4 > S01.40 > S01.409 S01.409 Unspecified open wound of unspecified cheek and temporomandibular area Non-Billable/Non-Specific Codes S01.409A..., initial encounterS01.409D..., subsequent encounterS01.409S..., sequela