The residence of the chairman of Nassau University Medical Center was broken into on Wednesday evening. However, the thieves seemed to target only specific documents related to a significant FBI investigation, as per sources from The Post.

Chairman Matthew Bruderman confirmed his house in Oyster Bay was broken into just two weeks after news broke that he was “cooperating” with the FBI and Department of Justice in an investigation of his claims that the hospital was robbed by state and previous county leaders of more than $1 billion since 2006.

The stolen documents were later recovered by Center Island police, who confirmed that an active investigation into the burglary is underway — but refused to release further information or say whether anyone was arrested.

Bruderman wasn’t home at the time of the robbery and only found out after police called to inform him they had recovered a binder with his name on it in a car driven by an unidentified couple, he said.

“I was confused because that was the binder I had on my desk when I left,” he said.

Bruderman said he later found his backdoor pried wide open.

The binder, he said, contained “sensitive” materials related to the ongoing federal investigation, including documents and records tied to the financial misconduct he claims to have uncovered while reviewing hospital finances and state reimbursements.

The chairman believes the timing of the break-in — and that nothing appeared to have been stolen besides the documents — raises red flags and serious concerns.

The FBI declined to comment on the investigation, which was opened in early April.

Bruderman has said he has been combing through the hospital’s financial records and reimbursement filings since his 2022 appointment, and he claims to have uncovered billions in state funds meant for NUMC that were funneled elsewhere.

At the heart of the alleged scheme is a little-known federal program called the Disproportionate Share Hospital Fund — meant to help keep afloat struggling hospitals such as NUMC, which treat large numbers of low-income patients on Medicaid and Medicare.

Under the program, the federal government agrees to give hospitals tens of millions of dollars in funding as long as their state matches the investment.

But Bruderman, a longtime financial advisor with over three decades of experience, said that’s not what has been happening at NUMC since at least 2006.

According to his review of internal financial records, previous hospital leadership allegedly “borrowed” what was supposed to be the state’s matching share from an offshore account tied to a Cayman Islands trust, originally set up to cover the medical center’s legal bills.

That money would be temporarily transferred into the hospital’s general fund just long enough to fool the feds into thinking New York had paid its share — unlocking the federal portion of the funding, hge claimed.

But once the federal funds cleared, the state’s contribution would allegedly be moved right back offshore.

That would mean those matching funds vanished into the shadows in a conspiracy that could’ve included top officials.