“His spirits are good and he is up and walking,” the pastor was quoted as saying by The Atlanta Journal-Constitution newspaper.
Carter was suffering from a subdural hematoma, caused by a series of falls over the past few weeks, and underwent the brain surgery on Tuesday.
Over the past year, Carter has also undergone surgery to mend a broken hip and pelvis.
Carter was the 39th president of the U.S., serving from 1977 to 1981.
He is the longest-living U.S. president.
In recent years, he has been treated for brain cancer.