T17.91Gastric contents in respiratory tract, part unspecified

T17.91 is the ICD-10-CM diagnosis code for gastric contents in respiratory tract, part unspecified. It belongs to category T17 (foreign body in respiratory tract), block T15-T19 (effects of foreign body entering through natural orifice) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within T17.9, choose T17.91 (Gastric contents in respiratory tract, part unspecified) only when documentation doesn't support a more specific option: unspecified foreign body in respiratory tract, part unspecified (T17.90), food in respiratory tract, part unspecified (T17.92) and other foreign object in respiratory tract, part unspecified (T17.99).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.