Intestinal infectious diseases
94 codes in this section
About Section A00-A09
Section A00-A09 (A00-A09) covers intestinal infectious diseases. It sits within the Certain infectious and parasitic diseases chapter (A00-B99). This section contains 94 ICD-10-CM codes, 79 billable diagnoses you can submit on a claim, and 15 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in A00-A09
Grouped by 3-character root code. Click any code for full detail.
| A00.0 | Cholera due to Vibrio cholerae 01, biovar cholerae | Billable |
| A00.1 | Cholera due to Vibrio cholerae 01, biovar eltor | Billable |
| A00.9 | Cholera, unspecified | Billable |
| A01.0 | Typhoid fever | Header |
| A01.00 | Typhoid fever, unspecified | Billable |
| A01.01 | Typhoid meningitis | Billable |
| A01.02 | Typhoid fever with heart involvement | Billable |
| A01.03 | Typhoid pneumonia | Billable |
| A01.04 | Typhoid arthritis | Billable |
| A01.05 | Typhoid osteomyelitis | Billable |
| A01.09 | Typhoid fever with other complications | Billable |
| A01.1 | Paratyphoid fever A | Billable |
| A01.2 | Paratyphoid fever B | Billable |
| A01.3 | Paratyphoid fever C | Billable |
| A01.4 | Paratyphoid fever, unspecified | Billable |
| A02.0 | Salmonella enteritis | Billable |
| A02.1 | Salmonella sepsis | Billable |
| A02.2 | Localized salmonella infections | Header |
| A02.20 | Localized salmonella infection, unspecified | Billable |
| A02.21 | Salmonella meningitis | Billable |
| A02.22 | Salmonella pneumonia | Billable |
| A02.23 | Salmonella arthritis | Billable |
| A02.24 | Salmonella osteomyelitis | Billable |
| A02.25 | Salmonella pyelonephritis | Billable |
| A02.29 | Salmonella with other localized infection | Billable |
| A02.8 | Other specified salmonella infections | Billable |
| A02.9 | Salmonella infection, unspecified | Billable |
| A03.0 | Shigellosis due to Shigella dysenteriae | Billable |
| A03.1 | Shigellosis due to Shigella flexneri | Billable |
| A03.2 | Shigellosis due to Shigella boydii | Billable |
| A03.3 | Shigellosis due to Shigella sonnei | Billable |
| A03.8 | Other shigellosis | Billable |
| A03.9 | Shigellosis, unspecified | Billable |
| A04.0 | Enteropathogenic Escherichia coli infection | Billable |
| A04.1 | Enterotoxigenic Escherichia coli infection | Billable |
| A04.2 | Enteroinvasive Escherichia coli infection | Billable |
| A04.3 | Enterohemorrhagic Escherichia coli infection | Billable |
| A04.4 | Other intestinal Escherichia coli infections | Billable |
| A04.5 | Campylobacter enteritis | Billable |
| A04.6 | Enteritis due to Yersinia enterocolitica | Billable |
| A04.7 | Enterocolitis due to Clostridium difficile | Header |
| A04.71 | Enterocolitis due to Clostridium difficile, recurrent | Billable |
| A04.72 | Enterocolitis due to Clostridium difficile, not specified as recurrent | Billable |
| A04.8 | Other specified bacterial intestinal infections | Billable |
| A04.9 | Bacterial intestinal infection, unspecified | Billable |
| A05.0 | Foodborne staphylococcal intoxication | Billable |
| A05.1 | Botulism food poisoning | Billable |
| A05.2 | Foodborne Clostridium perfringens [Clostridium welchii] intoxication | Billable |
| A05.3 | Foodborne Vibrio parahaemolyticus intoxication | Billable |
| A05.4 | Foodborne Bacillus cereus intoxication | Billable |
| A05.5 | Foodborne Vibrio vulnificus intoxication | Billable |
| A05.8 | Other specified bacterial foodborne intoxications | Billable |
| A05.9 | Bacterial foodborne intoxication, unspecified | Billable |
| A06.0 | Acute amebic dysentery | Billable |
| A06.1 | Chronic intestinal amebiasis | Billable |
| A06.2 | Amebic nondysenteric colitis | Billable |
| A06.3 | Ameboma of intestine | Billable |
| A06.4 | Amebic liver abscess | Billable |
| A06.5 | Amebic lung abscess | Billable |
| A06.6 | Amebic brain abscess | Billable |
| A06.7 | Cutaneous amebiasis | Billable |
| A06.8 | Amebic infection of other sites | Header |
| A06.81 | Amebic cystitis | Billable |
| A06.82 | Other amebic genitourinary infections | Billable |
| A06.89 | Other amebic infections | Billable |
| A06.9 | Amebiasis, unspecified | Billable |
| A07.0 | Balantidiasis | Billable |
| A07.1 | Giardiasis [lambliasis] | Billable |
| A07.2 | Cryptosporidiosis | Billable |
| A07.3 | Isosporiasis | Billable |
| A07.4 | Cyclosporiasis | Billable |
| A07.8 | Other specified protozoal intestinal diseases | Billable |
| A07.9 | Protozoal intestinal disease, unspecified | Billable |
| A08.0 | Rotaviral enteritis | Billable |
| A08.1 | Acute gastroenteropathy due to Norwalk agent and other small round viruses | Header |
| A08.11 | Acute gastroenteropathy due to Norwalk agent | Billable |
| A08.19 | Acute gastroenteropathy due to other small round viruses | Billable |
| A08.2 | Adenoviral enteritis | Billable |
| A08.3 | Other viral enteritis | Header |
| A08.31 | Calicivirus enteritis | Billable |
| A08.32 | Astrovirus enteritis | Billable |
| A08.39 | Other viral enteritis | Billable |
| A08.4 | Viral intestinal infection, unspecified | Billable |
| A08.8 | Other specified intestinal infections | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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