He is expected to return in time for Monaco in two weeks
Before qualifying on Saturday, the 49-year-old Briton was rushed from the Circuit de Catalunya to a Barcelona hospital, suffering from pain.
Initially reported as kidney stones, Fry was actually diagnosed with appendicitis, and Ferrari team boss Stefano Domenicali said he underwent an appendectomy late on Saturday.
“We wish him all the best for a rapid recovery,” said the Italian.
The Sapa-AFP news agency said Fry will not return to work on Sunday, but the Finnish broadcaster MTV3 said he is expected to return in time for Monaco in two weeks.
“It’s important that he is back on his feet soon,” Domenicali is quoted by Speed Week.
“We had to change our structure a little bit, but that is secondary,” he insisted.