But the Association of Personal Injury Lawyers (Apil) says the increase in claims has improved healthcare standards.
BBC: Welsh NHS payments for errors rise 50% in three years
2.
Brian Dawson, Apil's Wales co-ordinator, told BBC Wales it was unfortunate that "no win, no fee" lawyers often got the reputation of being "ambulance chasers".
BBC: Welsh NHS payments for errors rise 50% in three years