The cause of death of Bethenny Frankel’s boyfriend Dennis Shields has been ruled “undetermined” – because an autopsy wasn’t performed, officials said Wednesday.

The city’s Chief Medical Examiner Barbara Sampson said an autopsy wasn’t done “due to religious objection,” a decision she said is upheld in cases where “no criminality is suspected.”

Shields, 51, died from a suspected drug overdose at his apartment in Trump Tower on Aug. 10 – despite being given two doses of Narcan.

He was able to tell responding officers that he took a fatal combination of oxycodone, Vicodin and a sleeping pill before losing consciousness.

On Sunday, Frankel, a star on the “Real Housewives of New York,” said his sudden death was “excruciating.”

“Our relationship is current so it’s painfully raw. Trying to stay healthy & move through it w tears & close friends. Xo,” she tweeted to her followers.