CMS Inpatient Payment Registry
MS-DRG Reference
Medicare Severity Diagnosis-Related Groups classify inpatient hospital stays for payment, organized into 25 Major Diagnostic Categories plus Pre-MDC, with official CMS relative weights and length-of-stay data.
- Pre-MDCPre-MDC17 DRGs
- MDC 01Diseases and Disorders of the Nervous System72 DRGs
- MDC 02Diseases and Disorders of the Eye10 DRGs
- MDC 03Diseases and Disorders of the Ear, Nose, Mouth and Throat25 DRGs
- MDC 04Diseases and Disorders of the Respiratory System41 DRGs
- MDC 05Diseases and Disorders of the Circulatory System101 DRGs
- MDC 06Diseases and Disorders of the Digestive System58 DRGs
- MDC 07Diseases and Disorders of the Hepatobiliary System and Pancreas36 DRGs
- MDC 08Diseases and Disorders of the Musculoskeletal System and Connective Tissue105 DRGs
- MDC 09Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast32 DRGs
- MDC 10Endocrine, Nutritional and Metabolic Diseases and Disorders26 DRGs
- MDC 11Diseases and Disorders of the Kidney and Urinary Tract42 DRGs
- MDC 12Diseases and Disorders of the Male Reproductive System21 DRGs
- MDC 13Diseases and Disorders of the Female Reproductive System25 DRGs
- MDC 14Pregnancy, Childbirth and the Puerperium23 DRGs
- MDC 15Newborns and Other Neonates with Conditions Originating in Perinatal Period7 DRGs
- MDC 16Diseases and Disorders of Blood, Blood Forming Organs and Immunologic Disorders15 DRGs
- MDC 17Myeloproliferative Diseases and Disorders, Poorly Differentiated Neoplasms28 DRGs
- MDC 18Infectious and Parasitic Diseases, Systemic or Unspecified Sites17 DRGs
- MDC 19Mental Diseases and Disorders9 DRGs
- MDC 20Alcohol or Drug Use or Induced Organic Mental Disorders4 DRGs
- MDC 21Injuries, Poisonings and Toxic Effects of Drugs20 DRGs
- MDC 22Burns6 DRGs
- MDC 23Factors Influencing Health Status and Other Contacts with Health Services10 DRGs
- MDC 24Multiple Significant Trauma8 DRGs
- MDC 25Human Immunodeficiency Virus Infections6 DRGs