Typhoid and paratyphoid fevers (A01) ICD-10-CM
The A01 code range covers typhoid and paratyphoid fevers with 13 ICD-10-CM diagnosis codes. 11 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the A01 Range 13 codes · 11 billable
- A01 Typhoid and paratyphoid feversNon-billable
- A01.0 Typhoid feverNon-billable
- A01.00 Typhoid fever, unspecified
- A01.01 Typhoid meningitis
- A01.02 Typhoid fever with heart involvement
- A01.03 Typhoid pneumonia
- A01.04 Typhoid arthritis
- A01.05 Typhoid osteomyelitis
- A01.09 Typhoid fever with other complications
- A01.1 Paratyphoid fever A
- A01.2 Paratyphoid fever B
- A01.3 Paratyphoid fever C
- A01.4 Paratyphoid fever, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the A01 range.
Paratyphoid Fever
A prolonged febrile illness commonly caused by several Paratyphi serotypes of SALMONELLA ENTERICA. It is similar to TYPHOID FEVER but less severe.
Typhoid Fever
An acute systemic febrile infection caused by SALMONELLA TYPHI, a serotype of SALMONELLA ENTERICA.
About the A01 Code Range
ICD-10 codes A01 cover typhoid and paratyphoid fevers, which are bacterial infections primarily affecting the intestines. These codes are used to document specific types and complications of infections caused by different Salmonella bacteria strains.
The ICD-10 code for typhoid fever includes A01.00 for unspecified cases and extends to various complications such as typhoid meningitis (A01.01), heart involvement (A01.02), pneumonia (A01.03), arthritis (A01.04), and osteomyelitis (A01.05). These distinguish severe manifestations of Salmonella Typhi infection. The section also covers paratyphoid fevers caused by Salmonella Paratyphi groups A, B, and C, each assigned unique codes A01.1, A01.2, and A01.3. The unspecified paratyphoid fever is coded as A01.4. Coders can rely on these to specify the type of Salmonella infection and any related complications.
Including synonyms like "infection of intestine caused by Salmonella group D" or "typhoid fever" linked to A01.00, or "Salmonella paratyphi colitis" for paratyphoid codes helps clarify proper coding. These distinctions support accurate reporting and treatment tracking of typhoid and paratyphoid conditions.
Questions About This Page
How many billable codes are in the A01 range?
Of the 13 codes in this range, 11 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the A01 range classify?
The range classifies typhoid and paratyphoid fevers. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
