On June 1, 2022, Michael Louis opened fire in the Natalie Building, part of the Saint Francis Hospital in Tulsa, Oklahoma, United States.

[2] Officers believe the last shot was fired around 4:58 p.m., and as they were moving towards the shooter's location while calling out "Tulsa police", they heard the final gunshot.

[11] Louis was formerly a resident of Newark, New Jersey, before moving to Oklahoma in the mid-2010s, and had previously lived in a few other cities across the country including Fort Smith, Arkansas, Rochester, New York, and Philadelphia, Pennsylvania.

[16] On June 2, the Chief of the Tulsa Police Department, Wendell Franklin, stated that Louis had undergone back surgery with Phillips and had suffered from pain since the operation.

The former president of the J.R. Gladden Society, a national organization of orthopedic physicians of color claimed the attack was a part of practicing medicine and that 99% of doctors across the country would report being threatened, having to fire patients, get restraining orders, or carry concealed for protection.