TRICARE Reimbursement Manual 6010.64-M, April 2021 Diagnosis Related Groups (DRGs) Chapter 6 Addendum C Diagnosis Related Groups (DRGs), DRG Relative Weights, Arithmetic And Geometric Mean Lengths-Of-Stay (LOS), And Short-Stay Outlier Thresholds - FY 2016 And Beyond Revision: Effective for admissions on or after October 1, 2015 and beyond, the DRG weights and rates are posted to the Defense Health Agency (DHA) website at http://health.mil/Military-Health-Topics/Business-Support/Rates-and-Reimbursement. - END -