A leading New York doctor and political ally of Senator Ted Cruz has gone into self-quarantine over fears he has coronavirus, DailyMail.com can reveal.

Alan Berger, a 55-year-old gynecologist who works for NYU Langone Health, volunteered to isolate himself and is no longer seeing patients, the facility confirmed today in a statement.

Berger has hosted fundraisers for Texas Republican Cruz in his hometown of Englewood, New Jersey and is said to be friendly with President Donald Trump's in laws, the Kushners.

Authorities have not commented on suggestions Berger is the 'patient zero' who interacted with Cruz and Matt Schlapp, the chairman of the American Conservative Union, at a CPAC conference.

The CPAC patient was described as a 55-year-old man who was recovering in New Jersey; Dr. Berger is a 55-year-old man who has self-isolated in New Jersey.

New Jersey authorities have confirmed that a 55-year-old man from Englewood was quarantined for a presumptive positive attended CPAC. He was in stable condition and has been hospitalized since March 4,

The Englewood man attended services at a temple in New Rochelle, New York, according to New Jersey commissioner of health Judith Persichille.

Self-isolating: NYU Langone hospital says Dr. Alan Berger, an obstetrician/gynecologist, has voluntarily self-quarantined. It did not say if he has tested positive for coronavirus

Self-quarantine: Texas senator Ted Cruz said he was staying at home after shaking hands with someone at the CPAC conservative conference

Conservative ally: Dr. Alan Berger, seen with his wife Deborah, is a prominent member of the Republican Jewish community and has raised funds for among other Mike Huckabee, the former Arkansas governor whose daughter Sarah Huckabee Sanders was Trump's press secretary

Schalpp shook hands with the President and mingled with Ivanka Trump, Lara Trump and Jared Kushner during the February 27 to March 1 event in Washington, D.C,'s Maryland suburbs but says he's 'healthy as a horse' and has urged attendees not to panic.

Cruz, however, announced on Sunday: 'Last night, I was informed that 10 days ago at CPAC I briefly interacted with an individual who is currently symptomatic and has tested positive for COVID-19.

'That interaction consisted of a brief conversation and a handshake.'

It was later announced that a second lawmaker, Arizona Republican Paul Gosar, and three members of his staff had also gone into quarantine following 'contact at CPAC with a person who has since been hospitalized with the Wuhan Virus.'

The chairman of the American Conservative Union has revealed that he interacted with the 55-year-old man infected with coronavirus before shaking hands with Donald Trump.

The possible new chain of infection emerged as the US coronavirus death toll continued to soar today, with another patient succumbing to the virus in Washington state to bring the total to 22.

Berger received his medical degree from Chicago Medical School at Rosalind Franklin University and has been in practice for more than 20 years.

In 2016 he and his brother Marc joined Cruz's Jewish leadership Coalition, consisting of several dozen Jewish community leaders and activists who backed Cruz's failed attempt at becoming the Republican Presidential nominee.

The previous December he co-hosted a fundraiser for Cruz in New Jersey and attended the Republican Jewish Coalition summit, where he declared his preference for Cruz or Arkansas Gov. Mike Huckabee over Trump, despite his ties to the Kushners.

'He said, 'Trust me, I'll do good for you.' That may be of concern to people in the community,' Berger said, when a Politico reporter asked him what he thought of then-candidate Trump's Middle East policies.

NYU Langone Health is one of the nation's top academic medical centers and has six inpatient facilities spread across New York City.

Its website lists two locations for Berger, one in East 32nd Street, central Manhattan, and 45th St in Brooklyn.

'At this time, we can confirm that Dr. Alan W. Berger is a member of our OBGYN department,' a spokeswoman told DailyMail.com.

'Dr. Berger informed us that he has voluntary self-quarantined and is not seeing patients at his private practice. We will share additional information with you as it becomes available.'

Chairman of the American Conservative Union Matt Schlapp said he had interacted with the infected individual before shaking hands with President Trump (pictured) last week at CPAC. Schlapp and Trump are pictured February 29

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A female relation reached by telephone today refused to discuss the clinician's condition, saying: 'I'm not speaking about it to anybody.'

The fall-out from CPAC being a possible site of infection has spread across conservative circles.

Schlapp said he had contacted anyone who may have had contact with the infected individual but said that person 'had no contact with either the president or the vice president'.

'I can tell you, when the president was on site at CPAC, he lives by what he tells us, because I saw him scrub down his hand and clean his hands more than once while he was on the premises, and I did the same,' Schlapp said.

He added in a tweet Sunday night: 'We did ask the patient the names of everyone he spent time with. Those who interacted with the attendee were informed. The good news is NO ONE has any symptoms.'

War Room podcast host Raheem Kassam said he was around the infected man and had been 'flu-sick unwell for the past week'.

He claimed the infected man was around for most of the Thursday activities and noting that Gosar and Cruz were in the green room 1pm to 5pm that day, Kassam said the likes of Rep Louie Gohmert, KellyAnne Conway and Rep Matt Gaetz may be at risk.

Kassam said the infected person was around on the Friday too.

'Everyone at the CPAC Shabbat dinner should be checked. The attendee was there,' Kassam tweeted Sunday.

Among those listed as possibly having exposure to the CPAC patient by Kassan were Ronna McDaniel, the chairman of the Republican national committee who spent much of Monday with Donald Trump; Matt Gaetz, who was also on Air Force One Monday; and Diamond and Silk, who were with Trump at a Cabinet Room reception for his African-American supporters last week.

Father-of-three Berger describes himself as a right-wing conservative Orthodox Jew and has served on the board of directors of NORPAC, the pro-Israel political action committee.

In a 2013 profile in the Jewish Standard, he revealed he had donated tens of thousands of dollars to political candidates, most of them Republican.

Over the years Berger has attended numerous political events, taking along his 42-year-old wife Deborah and their three children, to meet the likes of Paul Ryan, Jeb Bush, John Bolton, Rick Perry and Sarah Palin.

Berger, who ran for mayor of his hometown of Englewood unsuccessfully, told the Standard he had also met leading Democratic figures including former Presidents Bill Clinton and Barack Obama.

'You have to listen to the other side,' he said, explaining that his political activism was inspired by Fabian Schonfeld, the founding rabbi of the Young Israel of Kew Gardens Hills in Queens, New York. 'He always instilled in us the importance of having a connection to government,' Berger said.