ICD-10-CM Code A04

Other bacterial intestinal infections

Version 2020 Non-Billable Code

Not Valid for Submission

A04 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other bacterial intestinal infections. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

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

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

  • A04.0 - Enteropathogenic Escherichia coli infection
  • A04.1 - Enterotoxigenic Escherichia coli infection
  • A04.2 - Enteroinvasive Escherichia coli infection
  • A04.3 - Enterohemorrhagic Escherichia coli infection
  • A04.4 - Other intestinal Escherichia coli infections
  • A04.5 - Campylobacter enteritis
  • A04.6 - Enteritis due to Yersinia enterocolitica
  • A04.7 - Enterocolitis due to Clostridium difficile
  • A04.71 - Enterocolitis due to Clostridium difficile, recurrent
  • A04.72 - Enterocolitis due to Clostridium difficile, not specified as recurrent
  • A04.8 - Other specified bacterial intestinal infections
  • A04.9 - 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 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.
  • bacterial foodborne intoxications, NEC A05
  • tuberculous enteritis A18.32

Code Classification

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

Code History

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

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 percent 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.


[Learn More]

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]