A09 - Infectious gastroenteritis and colitis, unspecified
ICD-10: | A09 |
Short Description: | Infectious gastroenteritis and colitis, unspecified |
Long Description: | Infectious gastroenteritis and colitis, unspecified |
Status: | Valid for Submission |
Version: | ICD-10-CM 2023 |
Code Classification: |
A09 is a billable ICD-10 code used to specify a medical diagnosis of infectious gastroenteritis and colitis, unspecified. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.
Unspecified diagnosis codes like A09 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.
Approximate Synonyms
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Acute erosive gastritis
- Acute gastroenteritis
- Acute gastroenteritis
- Acute infectious nonbacterial gastroenteritis
- Acute infective gastroenteritis
- Acute ulcerative gastroenteritis complicating pneumonia
- Aspergillosis enteritis of intestine
- Aspergillosis enteritis of intestine
- Aspergillus colitis
- Blastomycotic enteritis of intestine
- Catarrhal dysentery
- Colitis presumed infectious
- Colitis, enteritis and gastroenteritis presumed infectious
- Diarrhea of presumed infectious origin
- Disease of presumed infectious origin
- Disease of presumed infectious origin
- Disorder of gastrointestinal tract co-occurrent with human immunodeficiency virus infection
- Disorder of gastrointestinal tract co-occurrent with human immunodeficiency virus infection
- Dysenteric diarrhea
- Enteritis of intestine presumed infectious
- Enteritis of small intestine presumed infectious
- Epidemic diarrhea
- Epidemic gastroenteritis
- Erosive gastritis
- Fungal colitis
- Fungal colitis
- Fungal duodenitis
- Fungal gastrointestinal infection
- Gastroenteritis presumed infectious
- Gastrointestinal infection
- Herpes simplex gastrointestinal tract infection
- Infection by Anisakidae
- Infection by Anisakis larva
- Infection of digestive system
- Infection of intestine caused by Anisakis larva
- Infection of large intestine
- Infectious colitis
- Infectious diarrheal disease
- Infectious disease of digestive tract
- Infectious enteritis of intestine
- Infectious gastroenteritis
- Infectious gastroenteritis co-occurrent with human immunodeficiency virus infection
- Infectious gastroenteritis co-occurrent with human immunodeficiency virus infection
- Infectious gastroenteritis with AIDS
- Infective gastritis
- Institution-acquired gastroenteritis
- Institutional environment related disease
- Intestinal infectious disease
- Megacolon due to infectious colitis
- Phlegmonous enteritis of gastrointestinal tract
- Purulent enteritis
- Secondary acquired megacolon
- Suppurative gastritis
- Toddler diarrhea
- Toxic megacolon
Clinical Information
- Erosive Gastritis-. gastritis that is characterized by erosion of the mucosal surface.
- Infectious Colitis-. a viral or bacterial infectious process affecting the large intestine.
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 this diagnosis code:
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Infectious colitis NOS
- Infectious enteritis NOS
- Infectious gastroenteritis NOS
Type 1 Excludes
Type 1 ExcludesA 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.
Index to Diseases and Injuries References
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:
- - Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) - M19.90
- - in (due to)
- - enteritis, infectious NEC - See Also: category M01; - A09
- - in (due to)
- - Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) - See Also: Enteritis; - K52.9
- - regional - See: Enteritis, regional, large intestine;
- - infectious - A09
- - regional - See: Enteritis, regional, large intestine;
- - Diarrhea, diarrheal (disease) (infantile) (inflammatory) - R19.7
- - dysenteric - A09
- - endemic - A09
- - epidemic - A09
- - infectious - A09
- - Disease, diseased - See Also: Syndrome;
- - diarrheal, infectious NEC - A09
- - Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) - A09
- - arthritis - See Also: category M01; - A09
- - Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) - K52.9
- - epidemic (infectious) - A09
- - infectious NOS - A09
- - septic - A09
- - Enterocolitis - See Also: Enteritis; - K52.9
- - infectious NEC - A09
- - Gastroenteritis (acute) (chronic) (noninfectious) - See Also: Enteritis; - K52.9
- - epidemic (infectious) - A09
- - Gastroenteropathy - See Also: Gastroenteritis; - K52.9
- - infectious - A09
- - Ileitis (chronic) (noninfectious) - See Also: Enteritis; - K52.9
- - infectious - A09
- - Ileocolitis - See Also: Enteritis; - K52.9
- - infectious - A09
- - Sigmoiditis - See Also: Enteritis; - K52.9
- - infectious - A09
Convert to ICD-9 Code
Source ICD-10 Code | Target ICD-9 Code | |
---|---|---|
A09 | 009.0 - Infectious enteritis NOS | |
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code. |
Patient Education
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]
Infectious Diseases
Germs, or microbes, are found everywhere - in the air, soil, and water. There are also germs on your skin and in your body. Many of them are harmless, and some can even be helpful. But some of them can make you sick. Infectious diseases are diseases that are caused by germs.
There are many different ways that you can get an infectious disease:
- Through direct contact with a person who is sick. This includes kissing, touching, sneezing, coughing, and sexual contact. Pregnant mothers can also pass some germs along to their babies.
- Through indirect contact, when you touch something that has germs on it. For example, you could get germs if someone who is sick touched a door handle, and then you touch it.
- Through insect or animal bites
- Through contaminated food, water, soil, or plants
There are four main kinds of germs:
- Bacteria - one-celled germs that multiply quickly. They may give off toxins, which are harmful chemicals that can make you sick. Strep throat and urinary tract infections are common bacterial infections.
- Viruses - tiny capsules that contain genetic material. They invade your cells so that they can multiply. This can kill, damage, or change the cells and make you sick. Viral infections include HIV/AIDS and the common cold.
- Fungi - primitive plant-like organisms such as mushrooms, mold, mildew, and yeasts. Athlete's foot is a common fungal infection.
- Parasites - animals or plants that survive by living on or in other living things. Malaria is an infection caused by a parasite.
Infectious diseases can cause many different symptoms. Some are so mild that you may not even notice any symptoms, while others can be life-threatening. There are treatments for some infectious diseases, but for others, such as some viruses, you can only treat your symptoms. You can take steps to prevent many infectious diseases:
- Get vaccinated
- Wash your hands often
- Pay attention to food safety
- Avoid contact with wild animals
- Practice safe sex
- Don't share items such as toothbrushes, combs, and straws
[Learn More in MedlinePlus]
Code History
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- 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)