What are ICD-9 diagnosis codes?

The International Classification of Diseases Clinical Modification, 9th Revision (ICD-9 CM) is a list of codes intended for the classification of diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances, and external causes of injury or disease.

How many ICD-9 codes are there?

13,000 codes
The current ICD-9-CM system consists of ∼13,000 codes and is running out of numbers.

What are the 17 chapters of ICD-9?

Glossary Definition

  • Infectious and Parasitic Diseases – (001 to 139)
  • Neoplasms (Cancer) – (140 to 239)
  • Endocrine, Nutritional and Metabolic Diseases – (240 to 279)
  • Diseases of the Blood and Blood-forming Organs – (280 to 289)
  • Mental Disorders – (290 to 319)
  • Diseases of the Nervous System and Sense Organs – (320 to 389)

When did we start using ICD-9 codes?

ICD-8 went into effect beginning in 1968. One year later, WHO advised a series of ICD-9 specifications. Several years later in 1975, ICD-9 was published with its implementation becoming formalized in 1979.

What is ICD-9 codes used for?

ICD-9-CM is the official system of assigning codes to diagnoses and procedures associated with hospital utilization in the United States. The ICD-9 was used to code and classify mortality data from death certificates until 1999, when use of ICD-10 for mortality coding started.

What does ICD code mean?

International Classification of Diseases
International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Why are ICD codes important?

The ICD is important because it provides a common language for reporting and monitoring diseases. This allows the world to compare and share data in a consistent and standard way – between hospitals, regions and countries and over periods of time.

WHO ICD-10 chapters?

ICD-10-CM Chapters

Chapter Code Range Description
1 A00-B99 Certain infectious and parasitic diseases
2 C00-D49 Neoplasms
3 D50-D89 Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
4 E00-E89 Endocrine, nutritional and metabolic diseases