Intestinal infectious diseases (A00-A09) ICD-10-CM
The A00–A09 section covers intestinal infectious diseases with 94 ICD-10-CM diagnosis codes, of which 79 are billable in fiscal year 2027. The section is organized into the 10 code ranges listed below.
Code Ranges in This Section 10 ranges · 94 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the A00–A09 Code Range
These conditions include intestinal infections caused by bacteria, protozoa, and viruses, along with bacterial foodborne intoxications and amebic infections outside the intestine.
The bacterial categories separate cholera in A00, typhoid and paratyphoid fevers in A01, and other salmonella infections in A02. Shigellosis, an intestinal disease caused by Shigella bacteria, appears in A03. A04 separates other bacterial intestinal infections by organism or type. A05 separates bacterial foodborne intoxications by organism.
A06 divides amebic infections by intestinal condition or affected site, including the liver, lungs, brain, and skin. A07 separates other protozoal intestinal diseases by disease. A08 distinguishes viral intestinal infections and other specified intestinal infections. A09 describes infectious gastroenteritis and colitis when unspecified.
Questions About This Page
How many codes are in the A00-A09 range?
The A00-A09 range contains 94 ICD-10-CM diagnosis codes in FY 2027. 79 of them are billable, and the rest are category headers that organize the section.
What conditions does A00-A09 cover?
The range covers intestinal infectious diseases. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
