England expect Kevin Pietersen to be fit for the start of the Test series against Sri Lanka in May after confirming Tuesday's hernia operation was a success.
The batsman was forced to return home early from the World Cup because of the problem and will now recuperate before beginning a period of rehabilitation with his county side Surrey.
ECB chief medical officer Dr Nick Peirce said: "Kevin underwent a successful, routine operation with a hernia and an area of weaknesses repaired on the left side, while a small hernia was identified and repaired on the right side.
"Kevin will now undergo a relatively brief period of rest before beginning a rehabilitation programme with Surrey CCC under the guidance of the England team medical staff.
"His return to first-class cricket will be determined once he commences his rehabilitation programme but we expect him to be fully fit in time for England's first summer Test starting May 26."
Pietersen's injury allowed England to bring in Eoin Morgan but his departure meant a reshuffle for Andy Flower's side, with Matt Prior moved up the order to open the batting.
"Once Kevin's hernia injury was identified we knew he would require an operation and the surgeon's findings further underline the seriousness of the injury," said Flower.
"We're pleased Kevin has undergone a successful surgery and can shortly begin his rehabilitation programme with a view to rejoining the England team in time for our first Test match of the summer against Sri Lanka."