Taxpayers are being hit by rising bills for NHS clinical negligence claims, the Welsh Conservatives have claimed.
The party says it is “alarming and shocking” that total payouts by the seven Welsh boards have risen by 43% in four years to over £90m in 2017-18.
Tory health spokeswoman Angela Burns has called for an inquiry, and action to tackle possible causes of errors.
The Welsh Government said Ministry of Justice rule changes had “significantly increased” the cost of settlements.
Official figures from the health boards show that payouts rose from just over £64m for 643 claims in 2013-14 to £91.4m for 792 payments in 2017-18.
The sum equates to around 1.5% of the total NHS Wales budget of £6bn.
Over the four-year period, the Cardiff and Vale board saw the biggest increase in the total paid out, more than tripling from £6.2m to £22.2m.