2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Typhoid and paratyphoid fevers
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to A01: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name A01, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming A01: its condition is not part of those codes, and both may be reported when the patient has both.

  • Block P35-P39 Infections specific to the perinatal period
    intestinal infectious disease (A00-A09) names A00-A09, which includes this code
  • P37 Other congenital infectious and parasitic diseases
    infectious neonatal diarrhea (A00-A09) names A00-A09, which includes this code

Code First 1

These codes say to code first a condition named in the note, and A01 is one of the conditions named.

  • M49 Spondylopathies in diseases classified elsewhere
    enterobacterial infections (A01-A04)

Patient EducationClinical

Salmonella Infections

Salmonella is the name of a group of bacteria. In the United States, it is a common cause of foodborne illness. Salmonella occurs in raw poultry, eggs, beef, and sometimes on unwashed fruit and vegetables. You also can get infected after handling pets, especially reptiles like snakes, turtles, and lizards.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About A01Overview

What is the ICD-10 code for typhoid and paratyphoid fevers?

A01 is the ICD-10-CM category for typhoid and paratyphoid fevers, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.