A09
BillableInfectious gastroenteritis and colitis, unspecified
Infectious gastroenteritis and colitis, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Infectious colitis NOS
- Infectious enteritis NOS
- Infectious gastroenteritis NOS
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •colitis NOSK52.9
- •diarrhea NOSR19.7
- •enteritis NOSK52.9
- •gastroenteritis NOSK52.9
- •noninfective gastroenteritis and colitis, unspecifiedK52.9
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(253)
SNOMED CT
- Gastric flu12463005
- Infectious gastroenteritis12463005
- Septic gastroenteritis12463005
- Infectious diarrhea19213003
- Infectious diarrheal disease19213003
- Infectious diarrhoea19213003
- Infectious diarrhoeal disease19213003
- Infective diarrhea19213003
- Infective diarrhoea19213003
- Acute infective gastroenteritis36789003
- Infectious colitis39341005
- Infective colitis39341005
- Septic colitis39341005
- Infantile diarrhea39963006
- Infantile diarrhoea39963006
- Toddler diarrhea39963006
- Toddler diarrhoea39963006
- Diarrhea of presumed infectious origin43240000
- Diarrhoea of presumed infectious origin43240000
- Dysenteric diarrhea46799006
- Dysenteric diarrhoea46799006
- Dysentery46799006
- Purulent enteritis47941007
- Infectious enteritis55184003
- Infectious enteritis of intestine55184003
- Infectious inflammation of intestine55184003
- Infective enteritis55184003
- Toxic state56302003
- Gastroenteritis - presumed infectious origin57419008
- Gastroenteritis presumed infectious57419008
- Catarrhal dysentery59253004
- Acute gastroenteritis69776003
- Disease of presumed infectious origin78885002
- Colitis - presumed infectious origin79099006
- Colitis presumed infectious79099006
- Epidemic diarrhea86615009
- Epidemic diarrhoea86615009
- Institutional environment related disease90896002
- Disease caused by Heterocheiloidea105697005
- Acute ulcerative gastroenteritis complicating pneumonia109814008
- Infectious disease of digestive tract128398001
- Infection by Blastomyces dermatitidis191950004
- Infection caused by Blastomyces dermatitidis191950004
- Secondary acquired megacolon197141006
- Infective gastritis235655002
- Phlegmonous enteritis235706001
- Phlegmonous enteritis of gastrointestinal tract235706001
- Infectious disease of intestine266071000
- Intestinal infection266071000
- Intestinal infectious disease266071000
- Colitis, enteritis and gastroenteritis presumed infectious266081001
- Fungal gastrointestinal infection312153005
- Infection of digestive system312158001
- Acute infectious nonbacterial gastroenteritis359613008
- Infectious gastroenteritis with AIDS (acquired immunodeficiency syndrome)421454008
- Infectious gastroenteritis with acquired immunodeficiency syndrome421454008
- Infection by Anisakidae442035006
- Infection caused by Anisakidae442035006
- Anisakiasis442652006
- Infection by Anisakis larva442652006
- Infection caused by Anisakis larva442652006
- Acute erosive gastritis444926003
- Epidemic gastroenteritis707222009
- Epidemic infectious gastroenteritis707222009
- Gastroenteritis, epidemic707222009
- Gastroenteritis, institutional707352004
- Institution-acquired gastroenteritis707352004
- Institutionally acquired gastroenteritis707352004
- Disorder of gastrointestinal tract co-occurrent with human immunodeficiency virus infection713300006
- Infectious gastroenteritis co-occurrent with human immunodeficiency virus infection713570009
- Gastrointestinal infection715852004
- Infection of gastrointestinal tract715852004
- Toxic megacolon due to infectious colitis722541007
- Infection of large intestine737345002
- Infection of intestine caused by Anisakis larva866120006
- Intestinal anisakiasis866120006
- Aspergillus colitis1163146002
- Colitis caused by Aspergillus1163146002
- Herpes simplex gastrointestinal tract infection1163467009
- Infection of gastrointestinal tract caused by human herpes simplex virus1163467009
- Colitis caused by Fungi1163488000
- Fungal colitis1163488000
- Duodenitis caused by fungus1163493002
- Fungal duodenitis1163493002
- Aspergillosis enteritis of intestine1193650002
- Inflammation of intestine caused by Aspergillus1193650002
- Blastomycotic enteritis of intestine1193651003
- Inflammation of intestine caused by Blastomyces dermatitidis1193651003
- Enteritis of small intestine presumed infectious1193753006
- Inflammation of small intestine presumed infectious1193753006
- Enteritis of intestine presumed infectious1193754000
- Inflammation of intestine presumed infectious1193754000
- Toxic megacolon1269214001
- Toxic state due to colonic dilatation1269214001
- Erosive gastritis1086791000119100
- Suppurative gastritis21871000119107
UMLS
- Enteritis infectiousC0021342
- Infectious enteritisC0021342
- Infectious enteritis NOSC0021342
- Infectious enteritis of intestineC0021342
- Infectious inflammation of intestineC0021342
- Infectious inflammation of intestine (disorder)C0021342
- Infective enteritisC0021342
- Gastric fluC0277525
- Infectious gastroenteritisC0277525
- Infectious gastroenteritis (disorder)C0277525
- Infectious gastroenteritis NOSC0277525
- Infective gastroenteritisC0277525
- Septic gastroenteritisC0277525
- Stomach FluC0277525
- Stomach fluC0277525
- flu stomachC0277525
- gastric fluC0277525
- infectious gastroenteritisC0277525
- stomach fluC0277525
- Infectious ColitisC0277524
- Infectious colitisC0277524
- Infectious colitis (disorder)C0277524
- Infectious colitis NOSC0277524
- Infective colitisC0277524
- Septic colitisC0277524
- infectious colitisC0277524
- infective colitisC0277524
- septic colitisC0277524
- Infectious gastroenteritis and colitis, unspecifiedC2880124
Clinical Terms
- Gastroenteritis, epidemic
- infectious gastroenteritis
- Gastroenteritis, institutional
- Infectious diarrhoeal disease
- flu stomach
- Colitis - presumed infectious origin
- Postdysenteric arthropathy
- Post-dysenteric arthropathy of vertebrae
- Disease of presumed infectious origin
- Disorder of gastrointestinal tract co-occurrent with human immunodeficiency virus infection
- Postdysenteric arthritis of left shoulder
- Colitis, enteritis and gastroenteritis presumed infectious
- Post-dysenteric arthropathy of left shoulder
- Aspergillus colitis
- Infectious inflammation of intestine
- Post-dysenteric arthropathy of left hip
- Postdysenteric arthritis of left hand
- Postdysenteric arthritis of vertebra
- Infection of large intestine
- Infectious diarrheal disease
- Inflammation of intestine presumed infectious
- Travelers diarrhea
- Post-dysenteric arthropathy of left wrist
- Intestinal anisakiasis
- Postdysenteric arthritis of left knee
- Septic gastroenteritis
- Post-dysenteric reactive arthropathy of multiple sites
- Infectious gastroenteritis with AIDS (acquired immunodeficiency syndrome)
- Postdysenteric arthritis of left elbow
- Toddler diarrhea
- Anisakiasis
- Colitis caused by Fungi
- Infection of digestive system
- Post-dysenteric arthropathy of left knee
- Aspergillosis enteritis of intestine
- Infantile diarrhoea
- Acute gastroenteritis
- Infection by Anisakis larva
- Epidemic diarrhoea
- septic colitis
- Infectious diarrhea
- Infectious inflammation of intestine (disorder)
- Infectious enteritis
- Infection caused by Anisakidae
- Infective diarrhoea
- Infectious colitis
- stomach flu
- Infectious gastroenteritis with acquired immunodeficiency syndrome
- Toxic megacolon due to infectious colitis
- Epidemic gastroenteritis
- Purulent enteritis
- Gastrointestinal infection
- Inflammation of small intestine presumed infectious
- Diarrhoea of presumed infectious origin
- Post-dysenteric arthropathy of left elbow
- Infectious enteritis of intestine
- Suppurative gastritis
- Phlegmonous enteritis of gastrointestinal tract
- Postdysenteric arthritis of left wrist
- Postdysenteric arthritis of multiple sites
- Post-dysenteric arthropathy of left ankle and/or foot
- Acute erosive gastritis
- Infective gastroenteritis
- Enteritis of intestine presumed infectious
- Post-dysenteric arthropathy of left hand
- Infection by Anisakidae
- infective colitis
- Duodenitis caused by fungus
- Infectious diarrhoea
- Gastroenteritis - presumed infectious origin
- Infectious colitis (disorder)
- Toddler diarrhoea
- Infantile diarrhea
- Infectious enteritis NOS
- Infection caused by Anisakis larva
- Blastomycotic enteritis of intestine
- Dysenteric diarrhea
- Gastroenteritis presumed infectious
- Toxic megacolon
- Epidemic diarrhea
- Colitis presumed infectious
- Institution-acquired gastroenteritis
- Post-dysenteric arthropathy
- Infection caused by Blastomyces dermatitidis
- Secondary acquired megacolon
- Fungal gastrointestinal infection
- Toxic state
- Acute infective gastroenteritis
- Gastric flu
- Inflammation of intestine caused by Blastomyces dermatitidis
- Institutional environment related disease
- Intestinal infectious disease
- Postdysenteric arthritis of left ankle
- Enteritis infectious
- Acute infectious nonbacterial gastroenteritis
- Infectious gastroenteritis NOS
- Epidemic infectious gastroenteritis
- Infection of intestine caused by Anisakis larva
- Postdysenteric arthritis of left hip
- Traveler's diarrhea
- Phlegmonous enteritis
- Intestinal infection
- Infectious colitis NOS
- Infectious gastroenteritis co-occurrent with human immunodeficiency virus infection
- Disease caused by Heterocheiloidea
- Catarrhal dysentery
- Infectious gastroenteritis (disorder)
- Colitis caused by Aspergillus
- Infection of gastrointestinal tract
- Infectious disease of intestine
- Toxic state due to colonic dilatation
- Diarrhea of presumed infectious origin
- Infective gastritis
- Fungal colitis
- Fungal duodenitis
- Herpes simplex gastrointestinal tract infection
- Erosive gastritis
- Infectious disease of digestive tract
- Infective diarrhea
- Infective enteritis
- Enteritis of small intestine presumed infectious
- Institutionally acquired gastroenteritis
- Inflammation of intestine caused by Aspergillus
- Dysentery
- Infection of gastrointestinal tract caused by human herpes simplex virus
- Dysenteric diarrhoea
- Infection by Blastomyces dermatitidis
- Acute ulcerative gastroenteritis complicating pneumonia
Frequently Asked Questions
What is the ICD-10 code for infectious gastroenteritis and colitis, unspecified?
The ICD-10-CM code for infectious gastroenteritis and colitis, unspecified is A09. The full clinical description is "Infectious gastroenteritis and colitis, unspecified". A09 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A09 mean?
ICD-10-CM code A09 represents “Infectious gastroenteritis and colitis, unspecified”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A09 a billable code?
Yes, A09 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A09 in?
A09 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A09?
A09 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; colitis NOS (K52.9); diarrhea NOS (R19.7); and 3 more.
Are additional codes required with A09?
Yes, when using A09, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A09 map to?
A09 maps to 52 SNOMED CT concepts: 444926003, 69776003, 359613008, 36789003, 109814008, and 47 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A09?
A09 is linked to 4 UMLS Concept Unique Identifiers: C0021342, C0277525, C0277524, C2880124. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A09 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like infectious gastroenteritis and colitis, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A09?
A09 maps to the ICD-11 code: 1A40.Z (Infectious gastroenteritis or colitis without specification of infectious agent).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.