Alf Clausen's final episode before he got fired. After this, he's only credited as "composer emeritus", most likely meaning the new music is inspired by him.
This was the last of The Simpsons to be scored by composer Alf Clausen, who had scored the show since 1990 before being fired in August 2017.
The part where Bart poses as a nurse during the scene where the Simpsons visit Gil in the hospital is improvised by Nancy Cartwright.