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Major Diagnostic Categories


The Major Diagnostic Categories (MDC) are formed by dividing all possible principal diagnoses from ICD-9-CM into 25 mutually exclusive diagnosis areas. The diagnoses in each MDC correspond to a single organ system or etiology and in general are associated with a particular medical specialty.
  • MDC 1 to MDC 23 are grouped according to principal diagnoses.
  • Patients are assigned to MDC 24 (Multiple Significant Trauma) with at least two significant trauma diagnosis codes (either as principal or secondaries) from different body site categories.
  • Patients assigned to MDC 25 (HIV Infections) must have a principal diagnosis of an HIV Infection or a principal diagnosis of a significant HIV related condition and a secondary diagnosis of an HIV Infection.

Detailed information about MDCs is available from the National Bureau of Economic Research and the Agency for Healthcare Research and Quality.

MDC

Definition

0

Ungroupable

1

Nervous System

2

Eye

3

Ear, Nose, Mouth, And Throat

4

Respiratory System

5

Circulatory System

6

Digestive System

7

Hepatobiliary System and Pancreas

8

Musculoskeletal System and Connective Tissue

9

Skin, Subcutaneous Tissue, and Breast

10

Endocrine, Nutritional, and Metabolic System

11

Kidney and Urinary Tract

12

Male Reproductive System

13

Female Reproductive System

14

Pregnancy, Childbirth, and Puerperium

15

Newborn and Other Neonates (Perinatal Period)

16

Blood and Blood Forming Organs and Immunological Disorders

17

Myeloproliferative Diseases and Disorders (Poorly Differentiated Neoplasms)

18

Infectious and Parasitic Diseases and Disorders

19

Mental Diseases and Disorders

20

Alcohol/Drug Use or Induced Mental Disorders

21

Injuries, Poison, and Toxic Effect of Drugs

22

Burns

23

Factors Influencing Health Status

24

Multiple Significant Trauma

25

Human Immunodeficiency Virus (HIV) Infection


The information provided above is from the Department of Health's NJSHAD web site (https://nj.gov/health/shad). The information published on this website may be reproduced without permission. Please use the following citation: " Retrieved Mon, 18 December 2017 2:03:39 from Department of Health, New Jersey State Health Assessment Data Web site: https://nj.gov/health/shad ".

Content updated: Wed, 15 Nov 2017 07:52:42 EST