All tests were negative, and the first baseman was released from St. Petersburg's St. Anthony's Hospital on Tuesday night.
"I just felt some tightness in my chest and they ran some tests on me at the hospital, and so far so good," Kotchman said. "Everything checked out."
When asked if the experience was scary, Kotchman replied: "I don't know. I don't think that's exactly how you draw up game 161, but everything checked out good and I'll be ready to go tonight."
Kotchman said what happened Tuesday night was a first for him, and he didn't really "want to analyze anything" in regard to whether he was experiencing heart problems, but he did note that what he felt was painful.
"Yeah, it was uncomfortable," Kotchman said. "It was very uncomfortable."
Kotchman had played in 103 consecutive games prior to missing Tuesday night's game. Kotchman was back in the clubhouse Wednesday feeling fine and was in the lineup against the Yankees.
"I saw him a couple of minutes ago; he said he was fine," Rays manager Joe Maddon said. "He definitely said he wanted to play, so we popped him in there. According to our medical folks, he's good. ... Just talking to him and looking at him in the eye, he looked very normal."
Sean Rodriguez filled in at first base Tuesday night because Maddon liked that he earned the distinction of having hit into a triple play earlier this season, then catching the final out of the Rays' 5-4-3 triple play Tuesday night.