Fetching details from the dictionary...

visit (to someone affected by illness or misfortune); call; inquiry (about someone's health); expression of sympathy
letter of inquiry; letter of sympathy; get-well letter; gift (in token of one's sympathy)
入院した友達のお見舞いに行きます。
I'll go visit the sick.
お見舞いありがとうございます。
Thank you for visiting me.
病院へお見舞いに行った。
I went to the hospital to visit.