The surgery occurred earlier in the week, and she was "recovering well" at Eisenhower Medical Center, the statement said.
No other information will be released for several days, the statement said.
Ford is 88. Her birthday is Sunday.
After her husband's death on Dec. 26 at age 93, Ford went on a cross-country trip to accompany his body for services in California, Washington, D.C., and his final resting place in Michigan.
First lady from 1974 to 1977, she earned wide respect through her frankness as she battled breast cancer, arthritis and addictions to drugs and alcohol