The MS-DRG Grouper tool is built on Inpatient Prospective Payment System (IPPS) rules for inpatient Facility coding/reimbursement. The Grouper allows users to enter one or more ICD-10-CM diagnosis codes and any applicable ICD-10-PCS procedure codes along with some other required inputs, click a button, and quickly get the resulting DRG and other important information (including the Relative Weight, Length of Stay, Procedure Type, Post Acute indication, etc.).