International Classification of Diseases 9th Revision Clinical Modification

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The Minimal Clinical Data (MCD) in Belgium are based on the International Classification of Diseases - Version 9 - Clinical Modification, (ICD-9-CM), which is used to code and classify morbidity data. ICD-9-CM volumes 1 and 2 are used for diagnostic codes, while volume 3 is a system of procedural codes. The ICD codes were first developed in 1893 in France by the physician Jacques Bertillion (1851-1922). They were first called the Bertillon Classification of Causes of Death. The first edition, known as the International List of Causes of Death, was adopted by the International Statistical Institute in 1893. The World Health Organization (WHO) took over the responsibility for the ICD at its creation in 1948 when the Sixth Revision, which included causes of morbidity for the first time, was published.

The International Classification of Diseases, Clinical Modification (ICD-9-CM) has the following structure:

The 2010 ICD-9-CM Volume 1 Diagnosis Codes are grouped into categories. For example ICD-9 code 250.0 means diabetes mellitus with no complications. For diabetes mellitus, a fifth (5th) digit classification is used, where 250.00 means " diabetes mellitus without mention of complcations" (250.0) and the fifth digit 0 means "type II or unspecified type, not stated as uncontrolled". The code 530.81 means gastro reflux disease (GERD), whic consists of the code "other specified disorders of the esophagus" (530.8), further specified into "esophagal reflux" (530.81). In the case of code 530.81, "reflux esophagitis" (530.11) is excluded.
A V code designates a patient who is accessing the healthcare system for some reason that does not require a diagnosis, usually a preventive reason. For example V70.0 is the code for a general health check up. The E section, deals with external causes of injury.The overview below is based on the 2009 editions of ICD-9-CM.

Diagnosis code index

Chapter I: 001-139 Infectious And Parasitic Diseases

Chapter II: 140-239 Neoplasms

Chapter III: 240-279 Endocrine, Nutritional And Metabolic Diseases, and Immunity Disorders

Chapter IV: 280-289 Diseases Of The Blood And Blood-Forming Organs

Chapter V: 290-319 Mental Disorders

Chapter VI: 320-389 Diseases of the Nervous System and Sense Organs

Chapter VII: 390-459 Diseases Of The Circulatory System

Chapter VIII: 460-519 Diseases Of The Respiratory System

Chapter IX: 520-579 Diseases Of The Digestive System

Chapter X: 580-629 Diseases Of The Genitourinary System

Chapter XI: 630-679 Complications of Pregnancy, Childbirth, and the Puerperium

Chapter XII: 680-709 Diseases of the Skin and Subcutaneous Tissue

Chapter XIII: 710-739 Diseases of the Musculoskeletal System and Connective Tissue

Chapter XIV: 740-759 Congential Anomalies

Chapter XV: 760-779 Certain Conditions Originating in the Perinatal Period

Chapter XVI: 780-799 Symptoms, Signs, And Ill-Defined Conditions

Chapter XVII: 800-999 Injury And Poisoning

V01-V89 Supplementary classification of factors influencing health status and contact with health services

E800-E999 Supplementary classification of external causes of injury and poisoning

Procedure code index


See also



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First version published on 25 October 2010.

The author of this Webpage is Peter Van Osta.

Email: pvosta{at}gmail{dot}com