Term: International Classification of Diseases (ICD) Chapters

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Glossary Definition

Last Updated: 2013-10-30

Definition:

The International Classification of Disease (ICD) coding system divides diseases and health conditions into similar categories based on body systems and health conditions. These categories are represented by different chapters in the ICD documentation. For some indicators used in MCHP research, the individual ICD Chapters have been used to classify these diseases and conditions. In addition, over time, changes to the ICD coding system have led to the capture of different versions of ICD data.

ICD-9-CM CHAPTERS

In the deliverable Sex Differences in Health Status, Health Care Use, and Quality of Care: A Population-Based Analysis for Manitoba's Regional Health Authorities by Fransoo et al., (2005), they used the ICD-9-CM chapters to classify diseases and conditions for certain indicators. These chapters, along with the 3-digit range of ICD codes, include:

1. Infectious and Parasitic Diseases - (001 to 139)
   
2. Neoplasms (Cancer) - (140 to 239)
   
3. Endocrine, Nutritional and Metabolic Diseases - (240 to 279)
   
4. Diseases of the Blood and Blood-forming Organs - (280 to 289)
   
5. Mental Disorders - (290 to 319)
   
6. Diseases of the Nervous System and Sense Organs - (320 to 389)
   
7. Diseases of the Circulatory System - (390 to 459)
   
8. Diseases of the Respiratory System - (460 to 519)
   
9. Diseases of the Digestive System - (520 to 579)
   
10. Diseases of the Genitourinary System - (580 to 629)
    
11. Complications of Pregnancy, Childbirth and the Puerperium - (630 to 677)
    
12. Diseases of the Skin and Subcutaneous Tissue - (680 to 709)
    
13. Diseases of the Musculoskeletal System and Connective Tissue - (710 to 739)
    
14. Congenital Anomalies - (740 to 759)
    
15. Certain Conditions Originating in the Perinatal period - (760 to 779)
    
16. Symptoms, Signs and Ill-Defined Conditions - (780 to 799)
    
17. Injury and Poisoning - (800 to 999).

Analyses performed "by cause" (see Related Terms below) also include an 18th group for services related to pregnancy and childbirth.

In some research, to allow fair comparisons overtime, diagnoses and causes of death coded in ICD-10 and ICD-10-CA are converted to ICD-9-CM codes and then grouped according to the ICD-9-CM chapters.

ICD-10-CA CHAPTERS

In the deliverable The 2013 RHA Indicators Atlas by Fransoo et al. (2013), they used the ICD-10-CA chapters to classify diseases and conditions for the indicators "cause of death" and "cause of hospital days used". These chapters, along with the 3-digit range of ICD codes, include:

1. Certain infectious and parasitic diseases - (A00 to B99)
   
2. Neoplasms (Cancer) - (C00 to D49)
   
3. Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism - (D50 to D59)
   
4. Endocrine, nutritional and metabolic diseases - (E00 to E99)
   
5. Mental and behavioural disorders - (F00 to F99)
   
6. Diseases of the nervous system - (G00 to G99)
   
7. Diseases of the eye and adnexa - (H00 to H59)
   
8. Diseases of the ear and mastoid process - (H60 to H99)
   
9. Diseases of the circulatory system - (I00 to I99)
   
10. Diseases of the respiratory system - (J00 to J99)
    
11. Diseases of the digestive system - (K00 to K99)
    
12. Diseases of the skin and subcutaneous tissue - (L00 to L99)
    
13. Diseases of the musculoskeletal system and connective tissue - (M00 to M99)
    
14. Diseases of the genitourinary system - (N00 to N99)
    
15. Pregnancy, childbirth and the puerperium - (O00 to O99)
    
16. Certain conditions originating in the perinatal period - (P00 to P99)
    
17. Congenital malformations, deformations, and chromosomal abnormalities - (Q00 to Q99)
    
18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified - (R00 to R99)
    
19. Injury, poisoning and certain other consequences of external causes (S00 to T99)
    
20. External causes of morbidity and mortality (V00 to Y99)
    
21. Factors influencing health status and contact with health services (Z00 to Z99); and
    
22. Codes for special purposes (e.g. research) (U00 to U99)

NOTE: Analyses typically only looks at the top five or ten "causes" for each indicator.

Related terms 

• Causes of Ambulatory Visits
• Causes of Child Mortality
• Causes of Day Surgery
• Causes of Death
• Causes of Hospital Days Used
• Causes of Hospital Days Used for Acute Care
• Causes of Hospitalization / Causes of Inpatient Hospitalization (Acute Care)
• Causes of Infant Mortality
• Causes of Premature Death
• International Classification of Diseases (ICD)
• International Classification of Diseases, 10th Revision, with Canadian Enhancements (ICD-10-CA)
• International Classification of Diseases, 9th Revision, with Clinical Modifications (ICD-9-CM)
• Long-Stay Days by Cause
• Mortality Rates by Cause
• World Health Organization (WHO)

References 

• Fransoo R, Martens P, The Need to Know Team, Burland E, Prior H, Burchill C, Chateau D, Walld R. Sex Differences in Health Status, Health Care Use, and Quality of Care: A Population-Based Analysis for Manitoba's Regional Health Authorities. Winnipeg, MB: Manitoba Centre for Health Policy, 2005. [Report] [Summary] [Additional Materials] (View)
• Fransoo R, Martens P, The Need to Know Team, Prior H, Burchill C, Koseva I, Bailly A, Allegro E. The 2013 RHA Indicators Atlas. Winnipeg, MB: Manitoba Centre for Health Policy, 2013. [Report] [Summary] [Additional Materials] (View)

Term used in 

• Fransoo R, Martens P, Burland E, The Need to Know Team, Prior H, Burchill C. Manitoba RHA Indicators Atlas 2009. Winnipeg, MB: Manitoba Centre for Health Policy, 2009. [Report] [Summary] [Additional Materials] (View)
• Katz A, Avery Kinew K, Star L, Taylor C, Koseva I, Lavoie J, Burchill C, Urquia M, Basham A, Rajotte L, Ramayanam V, Jarmasz J, Burchill S. The Health Status of and Access to Healthcare by Registered First Nation Peoples in Manitoba. Winnipeg, MB: Manitoba Centre for Health Policy, 2019. [Report] [Summary] [Updates and Errata] [Additional Materials] (View)
• Martens P, Fransoo R, The Need to Know Team, Burland E, Prior H, Burchill C, Romphf L, Chateau D, Bailly A, Ouelette C. What Works? A First Look at Evaluating Manitoba's Regional Health Programs and Policies at the Population Level. Winnipeg, MB: Manitoba Centre for Health Policy, 2008. [Report] [Summary] [Additional Materials] (View)
• Martens PJ, Bartlett J, Burland E, Prior H, Burchill C, Huq S, Romphf L, Sanguins J, Carter S, Bailly A. Profile of Metis Health Status and Healthcare Utilization in Manitoba: A Population-Based Study. Winnipeg, MB: Manitoba Centre for Health Policy, 2010. [Report] [Summary] [Updates and Errata] [Additional Materials] (View)