The subdivisions of gastroenteritis or colitis of infectious origin classified in the ICD-11 include:
- Bacterial Intestinal Infection
- Bacterial Foodborne Intoxications
- Viral Intestinal Infections
- Protozoal Intestinal Infections
- Intestinal Fungal Infections
- 1A49 Gastroenteritis or Colitis without Specification of Infectious Agent

Reference:
World Health Organization. (2019). International Statistical Classification of Diseases and Related Health Problems (11th ed.).

[ICD-11] Gastroenteritis or Colitis of Infectious Origin - List

Conditions Coded Elsewhere include:
- Intestinal Fungal Infections

-	Gastroenteritis or Colitis of Infectious Origin
-	Predominantly Sexually Transmitted Infections
-	Mycobacterial Diseases
-	Certain Staphylococcal or Streptococcal Diseases
-	Pyogenic Bacterial Infections of the Skin or Subcutaneous Tissues
-	Certain Zoonotic Bacterial Disease
-	Other Bacterial Diseases
-	Human Immunodeficiency Virus Disease
-	Viral Infections of the Nervous System
-	Non-Viral and Unspecified Infections of the Central Nervous System
-	Dengue
-	Certain Arthropod-borne Viral Fevers
-	Certain Zoonotic Viral Diseases
-	Certain Other Viral Diseases
-	Influenza
-	Viral Hepatitis
-	Viral Infections Characterized by Skin or Mucous Membrane Lesions
-	Mycoses
-	Parasitic Diseases 
-	Sepsis
-	Certain Other Disorders of Infectious Origin
-	Sequelae of Infectious Diseases



[ICD-11] List of Certain Infectious of Parasitic Diseases

[ICD-11] Gastroenteritis or Colitis of Infectious Origin

This ICD-11 block excludes nonspecific and nongonococcal urethritis and arthropathy following genitourinary infection. The following conditions, while sexually transmissible, are coded elsewhere in ICD-11: sexually transmissible viral hepatitis, herpes simplex labialis, herpes simplex gingivostomatitis, vulvovaginal candidosis, candida balanoposthitis, human immunodeficiency virus disease, other infections with a predominantly sexual mode of transmission complicating pregnancy, childbirth, or the puerperium, candidosis of external genitalia, and anogenital molluscum contagiosum.

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