Other protozoal intestinal diseases
In Intestinal infectious diseases (A00-A09), chapter 1: Certain Infectious and Parasitic Diseases
7 billable codes under A07: 6 are a CC; 1 map to HCC 6 (Opportunistic Infections).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Rules for coding infections and parasitic diseases, including HIV, organism and drug resistance codes, sepsis and septic shock, MRSA, Zika, and COVID-19.
- Human Immunodeficiency Virus (HIV) Infections (page 19)
- Infectious agents as the cause of diseases classified to other chapters (page 22)
- Infections resistant to antibiotics (page 22)
- Sepsis, Severe Sepsis, and Septic Shock (page 23)
- Methicillin Resistant Staphylococcus aureus (MRSA) Conditions (page 27)
- Zika virus infections (page 28)
- Coronavirus infections (page 28)
All codes under A07
A07 can't be used on a claim. Pick a billable code below; grey headings group them.
A07 MS-DRGs
As the principal diagnosis, the billable codes under A07 group to MS-DRG 371, 372, 373, 974, 975, or 976 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 371 Major Gastrointestinal Disorders and Peritoneal Infections with MCC (7 of 7 codes)
- DRG 372 Major Gastrointestinal Disorders and Peritoneal Infections with CC (7 of 7 codes)
- DRG 373 Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC (7 of 7 codes)
- DRG 974 HIV with Major Related Condition with MCC (1 of 7 codes)
- DRG 975 HIV with Major Related Condition with CC (1 of 7 codes)
- DRG 976 HIV with Major Related Condition without CC/MCC (1 of 7 codes)
Other codes that refer to A07
Notes on these codes point to A07.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Gastroenteritis
Gastroenteritis is an inflammation of the lining of the stomach and intestines. The main symptoms include vomiting and diarrhea. It is usually not serious in healthy people, but it can sometimes lead to dehydration or cause severe symptoms.
Read more about gastroenteritis on MedlinePlusParasitic Diseases
Parasites are living things that use other living things - like your body - for food and a place to live. You can get them from contaminated food or water, a bug bite, or sexual contact. Some parasitic diseases are easily treated and some are not.
Read more about parasitic diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.