The 2023 AdventHealth 400 was a NASCAR Cup Series race held on May 7, 2023, at Kansas Speedway in Kansas City, Kansas. Contested over 267 laps on the 1.5-mile (2.4 km) asphalt speedway, it was the 12th race of the 2023 NASCAR Cup Series season.

Kansas Speedway is a 1.5-mile (2.4 km) tri-oval race track in Kansas City, Kansas. It was built in 2001 and hosts two annual NASCAR race weekends. The NTT IndyCar Series also raced there until 2011. The speedway is owned and operated by the International Speedway Corporation.

Denny Hamlin was the fastest in the practice session with a time of 30.877 seconds and a speed of 174.887 mph (281.453 km/h).

William Byron scored the pole for the race with a time of 30.133 and a speed of 179.206 mph (288.404 km/h).

After the race was over, there was a big fistfight on pit road between Noah Gragson and Ross Chastain on pit road. The two were discussing an on track incident where Gragson hit the wall when things started to escalate quickly when Gragson grabbed Chastain's firesuit. Chastain told Gragson to stop but Gragson didn't and Chastain responded by throwing a punch at Gragson that connected and the two got into a scuffle on pit road. Gragson tried to punch Chastain back but was held back by security and the two were eventually separated on pit road.

Stage One Laps: 80

Stage Two Laps: 85

Stage Three Laps: 102