International classification of diseases

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International classification of diseases is a system of classifying diseases. The International Classification of Diseases (ICD) is a globally recognized system for recording diseases and health conditions. It is employed by healthcare providers, policy makers, researchers, and public health officials around the world for a multitude of purposes, ranging from health statistics and epidemiology to health care management and billing.

History[edit | edit source]

The inception of the ICD traces back to the 19th century. Originally known as the International List of Causes of Death, it was adopted for mortality statistics in a number of countries. The name was later changed to its current form to reflect its broader scope.

Purpose and Use[edit | edit source]

  • Disease Classification: At its core, the ICD categorizes diseases, signs and symptoms, abnormal findings, and external causes of injuries.
  • Health Statistics and Data: It assists in the collection and reporting of epidemiological data, health trends, and global mortality and morbidity rates.
  • Health Care Management: The system is used for billing and health insurance claims, ensuring a standardized approach to disease classification and treatment cost allocation.
  • Research: Researchers utilize the ICD for epidemiological studies and monitoring disease outbreaks and health trends.

Structure[edit | edit source]

The ICD consists of a series of codes that are linked to specific health conditions. Each code is a unique combination of letters and numbers.

  • Chapters: The ICD is divided into chapters based on body system or condition type. For instance, one chapter might be dedicated to cardiovascular conditions, while another focuses on mental health disorders.
  • Blocks of Codes: Within each chapter, diseases and conditions are grouped into blocks of related conditions.
  • Specific Codes: Each disease or condition is then assigned a specific code within that block.

Revisions[edit | edit source]

The ICD is periodically updated to ensure that it remains current with modern medicine. These updates are termed revisions, and as of the last update, the ICD is in its 10th revision, commonly referred to as ICD-10. A future version, ICD-11, is in the works and is expected to replace ICD-10 soon.

Criticism and Controversies[edit | edit source]

Like any global classification system, the ICD isn’t without its critics. Some common criticisms include:

  • The vast and intricate nature of the ICD can make it challenging to navigate and utilize effectively.
  • There have been debates over the inclusion or exclusion of certain conditions.
  • The periodic revisions can pose challenges for continuity in long-term studies or data collection.

Importance in Global Health[edit | edit source]

The ICD is an invaluable tool in global health for several reasons:

  • It offers a unified language for health professionals worldwide, ensuring consistency and clarity in disease classification.
  • By standardizing health conditions and their definitions, the ICD facilitates comparisons of health data across different regions and nations.
  • Governments and health organizations can tailor their health policies and interventions based on data categorized using the ICD.
International classification of diseases Resources


Contributors: Prab R. Tumpati, MD