2022 ICD-10-CM Code A04

Other bacterial intestinal infections

Version 2021

Not Valid for Submission

ICD-10:A04
Short Description:Other bacterial intestinal infections
Long Description:Other bacterial intestinal infections

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Intestinal infectious diseases (A00-A09)
      • Other bacterial intestinal infections (A04)

A04 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other bacterial intestinal infections. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Other bacterial intestinal infections

Non-specific codes like A04 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for other bacterial intestinal infections:

  • BILLABLE CODE - Use A04.0 for Enteropathogenic Escherichia coli infection
  • BILLABLE CODE - Use A04.1 for Enterotoxigenic Escherichia coli infection
  • BILLABLE CODE - Use A04.2 for Enteroinvasive Escherichia coli infection
  • BILLABLE CODE - Use A04.3 for Enterohemorrhagic Escherichia coli infection
  • BILLABLE CODE - Use A04.4 for Other intestinal Escherichia coli infections
  • BILLABLE CODE - Use A04.5 for Campylobacter enteritis
  • BILLABLE CODE - Use A04.6 for Enteritis due to Yersinia enterocolitica
  • NON-BILLABLE CODE - A04.7 for Enterocolitis due to Clostridium difficile
  • BILLABLE CODE - Use A04.71 for Enterocolitis due to Clostridium difficile, recurrent
  • BILLABLE CODE - Use A04.72 for Enterocolitis due to Clostridium difficile, not specified as recurrent
  • BILLABLE CODE - Use A04.8 for Other specified bacterial intestinal infections
  • BILLABLE CODE - Use A04.9 for Bacterial intestinal infection, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code A04:


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Information for Patients


Bacterial Infections

Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1% of the different types make people sick. Many are helpful. Some bacteria help to digest food, destroy disease-causing cells, and give the body needed vitamins. Bacteria are also used in making healthy foods like yogurt and cheese.

But infectious bacteria can make you ill. They reproduce quickly in your body. Many give off chemicals called toxins, which can damage tissue and make you sick. Examples of bacteria that cause infections include Streptococcus, Staphylococcus, and E. coli.

Antibiotics are the usual treatment. When you take antibiotics, follow the directions carefully. Each time you take antibiotics, you increase the chances that bacteria in your body will learn to resist them causing antibiotic resistance. Later, you could get or spread an infection that those antibiotics cannot cure.

NIH: National Institute of Allergy and Infectious Diseases


[Learn More in MedlinePlus]

Gastroenteritis

Have you ever had the "stomach flu?" What you probably had was gastroenteritis - not a type of flu at all. Gastroenteritis is an inflammation of the lining of the intestines caused by a virus, bacteria, or parasites. Viral gastroenteritis is the second most common illness in the U.S. The cause is often a norovirus infection. It spreads through contaminated food or water or by contact with an infected person. The best prevention is frequent hand washing.

Symptoms of gastroenteritis include diarrhea, abdominal pain, vomiting, headache, fever, and chills. Most people recover with no treatment.

The most common problem with gastroenteritis is dehydration. This happens if you do not drink enough fluids to replace what you lose through vomiting and diarrhea. Dehydration is most common in babies, young children, older adults, and people with weak immune systems.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)