Chemical pneumonitis due to anesthesia

**Inclusion terms:** - Mendelson's syndrome - Postprocedural aspiration pneumonia

**Excludes1:** - aspiration pneumonitis due to anesthesia complicating labor and delivery (O74.0) - aspiration pneumonitis due to anesthesia complicating pregnancy (O29) - aspiration pneumonitis due to anesthesia complicating the puerperium (O89.01)

**Use additional code:** - code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5)