2026 ICD-10-CM Diagnosis Code A01Typhoid and paratyphoid fevers

ICD-10-CM Codes›A00–B99›A00-A09›A01

ICD-10-CM A01
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A01 is a non-billable ICD-10-CM category code for typhoid and paratyphoid fevers, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A01.00, A01.01, A01.02, and A01.03.

Code Identity

ICD-10-CM Code
A01
Billable Status
No — Non-Billable Category
Code Describes
Typhoid and paratyphoid fevers
Chapter
A00-A09
Intestinal infectious diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA01Typhoid and paratyphoid fevers
This CodeA01Typhoid and paratyphoid fevers

Specific Coding for Typhoid and paratyphoid feversOverview

Non-specific codes like A01 require more characters. Use one of these billable codes instead:

  • A01.0 for Typhoid fever

  • Use A01.00 for Typhoid fever, unspecified

  • Use A01.01 for Typhoid meningitis

  • Use A01.02 for Typhoid fever with heart involvement

  • Use A01.03 for Typhoid pneumonia

  • Use A01.04 for Typhoid arthritis

  • Use A01.05 for Typhoid osteomyelitis

  • Use A01.09 for Typhoid fever with other complications

  • Use A01.1 for Paratyphoid fever A

  • Use A01.2 for Paratyphoid fever B

  • Use A01.3 for Paratyphoid fever C

  • Use A01.4 for Paratyphoid fever, unspecified

Patient EducationClinical

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A01Overview

Is A01 (Typhoid and paratyphoid fevers) a billable code?

No. This is a category header that groups the codes for typhoid and paratyphoid fevers, and headers cannot be submitted on claims. Claims for typhoid and paratyphoid fevers need a more specific code from this category, such as A01.00, A01.01, and A01.02.