Luis Severino has gone from getting knocked out in the first inning of the wild-card game to having a chance to pitch the Yankees into the World Series.

And despite the team’s concerns about his health during his last outing against the Astros, when he was removed after four innings, the Yankees are now convinced he’s healthy heading into Game 6 of the ALCS on Friday in Houston.

The right-hander threw a bullpen session before Wednesday’s 5-0 win in The Bronx and reported no issues.

“From the beginning, I said there was no problem and that I didn’t feel anything,” Severino said. “I threw today and felt 100 percent.”

Now, he and the Yankees have to figure out a way to beat Justin Verlander.

If they do, it’s on to the World Series — and even more innings for Severino, who already has pitched a career-high 204 ²/₃. His previous ceiling came in 2015, when he threw 161 ²/₃ innings and now could make as many as three more starts.

Last season, he was limited to 151 ¹/₃ innings because of time spent on the disabled list and in the bullpen, but the Yankees aren’t holding back.