ICD-10 Code A01

Typhoid and paratyphoid fevers

Version 2019 Non-Billable Code

Not Valid for Submission

A01 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of typhoid and paratyphoid fevers. The code is NOT valid for the year 2019 for the submission of HIPAA-covered transactions.

ICD-10: A01
Short Description:Typhoid and paratyphoid fevers
Long Description:Typhoid and paratyphoid fevers

Consider the following ICD-10 codes with a higher level of specificity:

  • A01.0 - Typhoid fever
  • 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

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Intestinal infectious diseases (A00-A09)
      • Typhoid and paratyphoid fevers (A01)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (first year ICD-10-CM implemented into the HIPAA mandated code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019

Information for Patients


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.

Symptoms include

  • Fever
  • Diarrhea
  • Abdominal cramps
  • Headache
  • Possible nausea, vomiting, and loss of appetite

Symptoms usually last 4-7 days. Your health care provider diagnoses the infection with a stool test. Most people get better without treatment. Infection can be more serious in the elderly, infants, and people with chronic health problems. If Salmonella gets into the bloodstream, it can be serious. The usual treatment is antibiotics.

Typhoid fever, a more serious disease caused by Salmonella, is not common in the United States. It frequently occurs in developing countries.

NIH: National Institute of Allergy and Infectious Diseases

  • Salmonella enterocolitis (Medical Encyclopedia)
  • Typhoid fever (Medical Encyclopedia)
  • Typhoid Vaccine (Centers for Disease Control and Prevention)

[Learn More]

ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.