ICD-10-CM > S00-T88 > T15-T19 > T17 > T17.8 > T17.81 > T17.818 T17.818 Gastric contents in other parts of respiratory tract causing other injury Non-Billable/Non-Specific Codes T17.818A..., initial encounterT17.818D..., subsequent encounterT17.818S..., sequela