A wealthy Muttontown surgeon has been convicted in federal court in Brooklyn of a massive Medicare fraud scheme for billing millions of dollars for surgeries that he didn’t perform.

Dr. Syed Ahmed, 51, faces up to 45 years in prison for health care fraud, false statements and money laundering, and authorities are also seeking forfeiture of his $4 million residence on Brookville Road.

Ahmed, indicted in 2014, was convicted of fraudulently billing Medicare $25 million and receiving $3 million from the program as payment for incision-and-drainage and wound surgeries. He had offices in Baldwin and Brooklyn.

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Since his arrest in 2014, the doctor has been detained. The government said he had strong ties to Pakistan, where he was born and attended medical school, and he had wired $2 million to a bank account there after he was first contacted about the fraud investigation.

The verdict was returned by a jury Thursday night, on the first day of deliberations after a trial lasting nearly three weeks.