It has not responded to his rehabilitation programme and the surgery is aimed at providing support to the lower part of his abdominal wall.
"It is a very complex injury and unfortunately has not responded as well as we would have hoped," The New Zealand Herald quoted physiotherapist Kate Stalker, as saying.
The decision has been after seeking expert opinion from England [ Images ] and South Africa, as well as regular assessments from NZ Cricket medical staff.
"On Wednesday he was assessed again by a team of consultants in Auckland who recommended the abdominal procedure," Stalker added.
No amount of game time has been specified for Ryder to complete before his return, but Stalker is optimistic that he can be ready in time for the Twenty20 [ Images ] world championship in West Indies [ Images ].