The new NHS 111 system is putting lives at risk because operators are making "inappropriate" decisions, reports The Independent.
The first official survey of doctors' experiences of the new advice number, which was rolled out across the country last month, reveals widespread concerns about clinical failings and "terrible" communication.
The still-unpublished document will increase fears that the advice line will be unable to cope with the increased demand brought about by GP closures over the bank holiday weekend.
At least 22 "possible serious untoward" incidents - three involving deaths - have been recorded in connection with the new NHS 111 advice line, it has been reported.
Two deaths are being investigated in the East Midlands, and one in the West Midlands, health magazine Pulse said.
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The new scheme also aims to help prevent the growth of diabetes, of which there are three million sufferers in the UK.