ICD-10-CM > S00-T88 > S10-S19 > S11 > S11.2 > S11.20 S11.20 Unspecified open wound of pharynx and cervical esophagus Non-Billable/Non-Specific Codes S11.20XA..., initial encounterS11.20XD..., subsequent encounterS11.20XS..., sequela