2026 ICD-10-CM Diagnosis Code A07.0Balantidiasis

ICD-10-CM Codes›A00–B99›A00-A09›A07

ICD-10-CM A07.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A07.0 is a billable ICD-10-CM diagnosis code for balantidiasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 371 through 373. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal infection; and Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
A07.0
Billable Status
Yes — Valid for Submission
Code Describes
Balantidiasis
Short Description
Balantidiasis
Same as the full description in the CMS dataset.
Parent Code
A07
Other protozoal intestinal diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA07Other protozoal intestinal diseases
This CodeA07.0Balantidiasis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Balantidiasis
  • Balantidium coli colitis
  • Colitis caused by protozoan
  • Disease caused by Balantidiidae
  • Disease caused by ciliate protozoa
  • Dysenteric diarrhea
  • Infection by Balantidium coli
  • Intestinal ciliate infection
  • Parasitic infection causing colitis

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Balantidial dysentery

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • Balantidium coli
    • Balantidiasis, balantidiosis
    • Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
      • balantidial
    • Diarrhea, diarrheal(disease) (infantile) (inflammatory)
      • balantidial
    • Dysentery, dysenteric(catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical)
      • balantidial
    • Dysentery, dysenteric(catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical)
      • Balantidium coli
    • Infection, infected, infective(opportunistic)
      • Balantidium coli
    • Infestation
      • Balantidium coli

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG001
Intestinal infection
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Balantidiasis

    infection by parasites of the genus balantidium. the presence of balantidium in the large intestine leads to diarrhea; dysentery; and occasionally ulcer.

  • Balantidiasis

    a parasitic protozoal infection caused by balantidium coli that involves the large intestinal mucosa. signs and symptoms include nausea, vomiting, diarrhea, abdominal pain, fever, headache and weight loss.

Patient EducationClinical

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.

The full article covers:

  • What is gastroenteritis?
  • What causes gastroenteritis?
  • What are the symptoms of gastroenteritis?
  • How is gastroenteritis diagnosed?
  • What are the treatments for gastroenteritis?
  • Can gastroenteritis be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A07.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
007.0 Balantidiasis
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A07.0Overview

Is A07.0 (Other protozoal intestinal diseases) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report balantidiasis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A07.0 group to?

When balantidiasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 371, 372, 373, with relative weights from 0.7274 to 1.7731 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of A07.0?

Under the General Equivalence Mappings, balantidiasis converts to ICD-9-CM 007.0 (balantidiasis). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.