Corbett spokesman Kevin Harley said at 10:30 a.m. Monday that he has spoken with the governor following the procedure and that Lt. Gov. Jim Cawley was no longer serving as acting governor. He had been under general anesthesia.
Corbett's physicians were scheduled to discuss the outcome at a news conference at Allegheny General Hospital later in the day.
The operation is part of the 61-year-old Republican governor's treatment for spinal stenosis, a narrowing of the spinal canal that can lead to pain and decreased activity.
Corbett's office said last week he was expected to spend a day or two in the hospital and then return to Harrisburg by the end of the week.
Harley said the governor sent one set of letters to the House and Senate outlining the constitutional provisions invoked to make Cawley acting governor, and a second set was going out following the operation.
A call to Cawley's office for comment was not immediately returned.