Ex-JPMorgan banker Chirayu Rana was referred for mental health treatment by prosecutors after they launched a criminal investigation into his claims that a senior banker turned him into a “sex slave” — and found nothing, sources told The Post on Wednesday. 

The Manhattan District Attorney’s Office started looking into the claims last summer after the moneyman, 35, leveled shocking sex abuse allegations against Lorna Hajdini, a 37-year-old JPMorgan executive director, according to a source familiar with the case.

The wild allegations, which JPMorgan has insisted are entirely fabricated, exploded into public view last week after Rana filed a lawsuit accusing his former colleague of drugging him, coercing him into degrading sex acts, calling him racist names and threatening his career if he refused.

It wasn’t immediately clear when Rana first went to the DA’s office with the allegations.

The probe, however, was ultimately thrown out after no evidence of criminal wrongdoing was uncovered, according to sources.

The DA’s office then referred Rana for mental health treatment under its victim support services, the source added, without elaborating further.

Rana, for his part, referenced what he claimed was an “open criminal investigation,” as well as his mental health treatment, in updated court filings filed on Monday in which he asked to remain anonymous in the suit.

As evidence to back up his claims, Rana alleged in the filings that he became enrolled in the state’s “Address Confidentiality Program” — a program that typically offers victims of sex crimes an alternative address to keep them safe — following a referral by the DA’s office last September.  

He also said a counsellor with the “Survivor Services Bureau of the New York County District Attorney’s Office” had “engaged with me in connection with the open criminal investigation by the Manhattan District Attorney’s Trial Division.”

He said the DA’s investigation and referral to victims’ services showed “independent third-party institutional engagement with me as a victim, predating by months the filing of this action,” his affidavit stated.

Elsewhere in the filing, Rana noted that he had initially sought mental health care from a psychotherapist, Jonathan Albert, in early February — months before the DA’s referral.

He included an email that he sent to the therapist in June last year that described several mental health symptoms — including hearing Hajdini’s voice inside his head and experiencing “recurrent nightmares” about the alleged assaults.

Rana claims the therapist diagnosed him with PTSD in October, according to the filings.  

The DA’s office declined to comment when asked if investigators had probed Rana’s claims.

Rana’s attorney didn’t immediately respond to The Post’s request for comment.

The development comes after Rana’s lawsuit, which he filed under the pseudonym “John Doe” before being unmasked, rose to viral infamy last week due to the lurid claims against Hajdini.

JPMorgan and Hajdini have both strenuously denied the allegations.

An internal probe carried out by the bank — which reviewed emails, records, and devices — found zero evidence of wrongdoing, multiple sources previously told The Post.

Rana also wouldn’t cooperate with the internal investigation, the bank said.

Meanwhile, The Post also revealed Rana had apparently lied to his employer that his father was dying so he could go on paid leave from the bank — and then apparently used the time off to prepare the bombshell lawsuit.