Staff and patients in Wales are afraid to complain according to the The Rt Hon Ann Clwyd MP, Co-Chair, Review of the NHS Hospitals Complaints System (NHS England) on 16 July 2014.
Whilst giving evidence to the Health and Social Care Committee, Ms Clwyd said there is a tendency in Wales not to complain and to feel "we don't want to upset" or bother somebody for fear they will receive poorer treatment.
Ms Clwyd said she hoped everyone working in the NHS could be honest and "say if something is wrong" and the Chair of the Health Boards "should encourage this honesty."
She added "people should be encouraged to speak out and not be afraid to speak out."
Ms Clwyd also said "an independent complaints regulator for Welsh NHS would be a start" to help the complaints procedure in Wales but she wasn't sure whether this responsibility should lie with the Healthcare Inspectorate Wales (HIW).
Even though her work is based on the complaints procedure in England, Ms Clwyd said 20% of the 4,000 complaints she has received via letters, e-mails and phone calls are about the Welsh NHS.