The largest colon cancer screening at multiple locations involved 7,240 screenings by Kaiser Permanente Southern California (USA) in Pasadena, California, USA, on 21 March 2013.

Screenings methods included at-home FIT tests, as well as in-office colonoscopy and flexible sigmoidoscopy procedures. 23 procedures from one site were not counted, for not meeting the minimum amount of 25 per site as required in the guidelines.