A Tairawhiti District Health Board (DHB) spokeswoman today confirmed that Mehta, practising as Dr Robert Taylor, was employed by the board as an off-site radiologist consultant up until earlier this year.
He had worked for the DHB for "quite some years" until his contract expired earlier this year, the spokeswoman said.
"He was essentially a tele-help radiologist so he worked remotely reading and reporting on x-rays, ultrasounds, MRIs, etcetera -- most recently from his base in Australia."
Mehta also worked for the health board remotely while he was based in New Zealand, she said.
"I think he's been on campus a couple of times, but he mostly worked remotely."
A Canterbury DHB spokeswoman confirmed Mehta also worked for Canterbury Medical Imaging -- now Canterbury Community Radiology.
Mehta was granted New Zealand citizenship in 2008 and in 2009 he moved to Australia on a transtasman visa, The Guardian reported. He worked there as a radiologist.
In January last year, Mehta was found to have forged signatures on medical accreditation documents with the Australian Health Practitioner Regulation Agency and the Royal Australian New Zealand College of Radiologists.
However, after a suspension and being ordered to complete an ethics course, he was allowed to continue working.
Australia's Medical Board began an "immediate action process" against Mehta earlier this week.
A warrant for his arrest remains active in the US and an international arrest for his extradition has been sought.
A New Zealand police national headquarters spokesman said they did not comment on "ongoing investigations of this nature".