The Welsh government has rejected calls for an inquiry into NHS care standards and death rates.
The calls were made after it was claimed an elderly patient suffered serious neglect at two Abertawe Bro Morgannwg University Health Board hospitals.
The government said there was no need for an inquiry and the health board has apologised.
But Welsh Conservative leader, Andrew RT Davies, has called for a probe similar to the Keogh review which has put 11 English trusts in to special measures.
Mr Davies made his call following a BBC Wales investigation into the case of an elderly woman who was admitted to the Princess of Wales Hospital, Bridgend, and Neath Port Talbot Hospital on three occasions between August 2010 and November 2012, when she died.
He said: “I believe we do need a Keogh inquiry similar to what has gone on in England to address the very real concerns in our hospitals so that we can have confidence that health boards, clinicians and families are having their concerns addressed and structures are put in place so we don’t get some of the terrible stories that are emanating out of England.”
The health board has given staff training to improve standards and said the case was completely unacceptable and apologised for the shortcomings in her care.