Health Street, a mobile clinic based drug and background testing service, is hitting the New York City streets in a renovated RV labeled “Who’s Your Daddy?” to offer mobile DNA testing.

The owner and operator of the tuck, Jared Rosenthal, told the Associated Press that a good amount of his business comes from fathers who are having doubts about their children.

“They flag us down, they pull us over, they talk to us,” Rosenthal explained. “Sometimes, because of the nature of the services, they want to be a little more discreet about it, but they do come or they’ll call the number.”

The first of its kind, the DNA truck requires cheek swabs from each person involved in the testing, and results are available about two days later.

The cost for a mobile paternity test ranges from $299 to $575.  The truck also offers background checks and court-ordered drug screenings.

Follow Carrie Healey on Twitter @CarrieHeals.