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. 2021 Jan 5;31(1):1–11. doi: 10.2188/jea.JE20200288

Table 1. Major Diagnostic Categories (MDCs).

MDC code Description
01 Diseases and Disorders of the Nervous System
02 Diseases and Disorders of the Eye
03 Diseases and Disorders of the Ear, Nose, and Throat
04 Diseases and Disorders of the Respiratory System
05 Diseases and Disorders of the Circulatory System
06 Diseases and Disorders of the Digestive System, Hepatobiliary System, and Pancreas
07 Diseases and Disorders of the Musculoskeletal System and Connective Tissues
08 Diseases and Disorders of the Skin and Subcutaneous Tissue
09 Diseases and Disorders of the Breast
10 Diseases and Disorders of the Endocrine, Nutritional and Metabolic System
11 Diseases and Disorders of the Kidney, Urinary Tract and Male Reproductive System
12 Diseases and Disorders Pertaining to the Female Reproductive System, Pregnancy, Childbirth, and Puerperium
13 Diseases and Disorders of the Blood, Blood Forming Organ and Myeloproliferative Diseases and Disorders
14 Neonatal Diseases and Disorders
15 Pediatric Diseases and Disorders
16 Trauma, Burns, and Poisonings
17 Mental Diseases and Disorders
18 Other Diseases and Disorders