ICD-10 Diagnosis Code A04.9

Bacterial intestinal infection, unspecified

Diagnosis Code A04.9

ICD-10: A04.9
Short Description: Bacterial intestinal infection, unspecified
Long Description: Bacterial intestinal infection, unspecified
This is the 2018 version of the ICD-10-CM diagnosis code A04.9

Valid for Submission
The code A04.9 is valid for submission for HIPAA-covered transactions.

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

Information for Medical Professionals

Diagnostic Related Groups
The diagnosis code A04.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)


Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
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.
  • 008.5 - Bacterial enteritis NOS

  • Bacterial dysentery
  • Bacterial enteritis
  • Bacterial gastroenteritis
  • Bacterial gastrointestinal infectious disease
  • Bacterial intestinal infectious disease
  • Bacterial overgrowth syndrome
  • Dysentery
  • Emphysematous gastritis
  • Small bowel bacterial overgrowth syndrome
  • Suppurative colitis

Index of Diseases and Injuries
References found for the code A04.9 in the Index of Diseases and Injuries:

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.

NIH: National Institute of Allergy and Infectious Diseases

  • Actinomycosis (Medical Encyclopedia)
  • Bacterial vaginosis -- aftercare (Medical Encyclopedia)
  • Blood culture (Medical Encyclopedia)
  • Gram stain (Medical Encyclopedia)
  • Gram stain of skin lesion (Medical Encyclopedia)
  • Necrotizing soft tissue infection (Medical Encyclopedia)



Also called: Stomach flu

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, and 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, the elderly and people with weak immune systems.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

  • Bacterial gastroenteritis (Medical Encyclopedia)
  • Bland diet (Medical Encyclopedia)
  • CMV - gastroenteritis/colitis (Medical Encyclopedia)
  • Stool Gram stain (Medical Encyclopedia)
  • Viral gastroenteritis (Medical Encyclopedia)
  • When you have nausea and vomiting (Medical Encyclopedia)
  • When you or your child has diarrhea (Medical Encyclopedia)

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