These codes are what your healthcare provider uses to describe the reasons they are prescribing Cologuard for you. Cologuard is only billed under CPT code 81528. It is also known as a HCPCS Level I or CPT Category I code. Cologuard - Exact Sciences Laboratories Tax ID: 46-3095174. Cologuard - Exact Sciences Laboratories NPI: 1629407069