Promotes a partnership with the inpatient coding professionals to ensure the accuracy of principal diagnosis, procedures and completeness of supporting documentation to determine the working and final DRG, severity of illness and risk of mortality. It is expected that the CDIS have previous clinical skills, including an understanding of Anatomy and Physiology in order to appropriately discuss with the physician such issues as the underlying etiology, principal diagnosis, diagnostic studies, treatment modalities, to name a few.