Gaetz's office noted that the congressman came into contact with the person who tested positive for COVID-19 at the Conservative Political Action Conference (CPAC).
"He received testing today and expects results soon", Mr Gaetz's office said on his Twitter account.
Gaetz was criticised by some other lawmakers last week after he seemed to mock concerns about the coronavirus by tweeting out pictures of himself working in the Capitol in a gas mask.
Collins and Gaetz each said separately that they are feeling well and are not exhibiting symptoms after interacting with the person who tested positive for COVID-19 at a conservative conference outside the nation's capital and would remain in self-quarantine for the 14-day period that began when they encountered the individual.
In another statement, Gaetz said his office in Washington is closed but his office in Florida is still open.
"We want people to just look at what we're doing", he said, adding, "Wash your hands; don't go out if you think you're sick".
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Further investigations are ongoing, with the police appealing for public assistance to identify the other women involved. Mr Banducci said these were "unusual and challenging times" and would introduce more limits if needed.
Gaetz was notified of his contact after he got onto Air Force One with the president.
She said neither she nor her staff are now exhibiting symptoms.
In the meantime, Gaetz is self-quarantining until this week, his office tweeted.
Gaetz flew with Trump aboard Air Force One on Monday afternoon before revealing he interacted with the glad-handing CPAC guest.
Mark Meadows, who was named as the incoming White House chief of staff on Friday night, announced Monday evening that he has been tested for coronavirus and that test came back negative.
Rep. Louie Gohmert says he also learned over the weekend that he had potentially been exposed to the virus at CPAC, but will not self-quarantine.
The American Conservative Union political group on Saturday said the CPAC attendee who tested positive for coronavirus was receiving medical care in New Jersey. Schlapp said he feels "healthy as a horse" after the "incidental contact" with the man, one of hundreds now infected across the U.S., including in the capital Washington DC, where the first cases surfaced over the weekend even as more than 500 cases were reportedly nationwide in more than 30 states.