A weight loss surgeon with a home on Long Island is accused of ripping off Medicare for millions of dollars.

Federal authorities say the 49-year-old Dr. Syed Ahmed reaped millions off of taxpayers by billing Medicare for procedures he never performed.

The FBI says the surgeon, who has a practice in Bellmore, used the scheme to fund a lavish lifestyle that included a $4 million Muttontown mansion.

In a criminal complaint unsealed in Brooklyn Federal Court Tuesday, it was revealed that seizure warrants were issued for the mansion and the contents of seven bank accounts. As a sole practitioner, they say Dr. Ahmed billed Medicare for $85 million between 2011 and 2013. Authorities did not reveal how much of the $85 million was considered fraudulent.

Dr. Ahmed's next court date is not yet known. He could face up to 10 years in prison if convicted.