Choose and Book scheme mandatory if you want to commission
Dr Phil Taylor queried £327,000 of work done by his foundation trust over three months last year because of incomplete, wrong or absent discharge information.
The queries amounted to 20 per cent of the total admissions to the trust for his patients between May and July.
Dr Taylor, whose practice in Axminster, Devon, is piloting practice-based commissioning, said he was still waiting for his queries to be answered.
He said: 'We thought we need to be sure of what we'll get for our money. The problem is we don't know if 20 per cent of our budget has been misspent.
'Even the very small numbers are significant because even trivial diagnoses can have a high price. At a practice level, if a small fraction were wrong that would make a big difference.