There are claims that the man accused of being a fake doctor in New South Wales hospitals may now be practising in Singapore.

Shyam Acharya allegedly used the name Dr Sarang Chitale to fraudulently work unchecked in four New South Wales Hospitals over more than a decade.

NSW Health Minister Brad Hazzard has announced an independent inquiry into the alleged fraud and may seize Acharya’s North Ryde house, estimated to be worth at least $1.25 million, in order to recoup wages paid to him.

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Syam Acharya allegedly impersonated a doctor for more than a decade. Photo: 7 News

"It is remarkable, it's unbelievable that he managed to con the entire health system for 11 years," Mr Hazzard said.

"It's the talk of every hospital, all the staff ... and they're all wondering just how many people might have been in the system."

There have been 30 phone calls since officials opened a phone line for patients - worried they'd been treated by the man known as Dr Sarang Chitale.

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Acharya worked in several NSW hospitals, including Manly Hospital. Photo: 7 News

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Brad Hazzard said it was unbelievable that Acharya allegedly faked being a doctor for so long. Photo: 7 News

Twenty-six were either mistaken or had been treated by Acharya but had suffered no adverse affects as a result. The remaining four cases are still being investigated.

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