A07.9 Protozoal intestinal disease, unspecified

The ICD-10-CM code for Protozoal intestinal disease, unspecified is A07.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A00-A09: Intestinal infectious diseases (A00-A09)

Category A07

8 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A07.9:

• Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) › protozoal
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › protozoal
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › protozoal
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › protozoal
• Infection, infected, infective (opportunistic) › flagellate, intestinal
• Diarrhea, diarrheal (disease) (infantile) (inflammatory) › flagellate
• Disease, diseased › protozoal › intestine, intestinal
• Disease, diseased › intestine › protozoal

Inclusion Terms

• Flagellate diarrhea
• Protozoal colitis
• Protozoal diarrhea
• Protozoal dysentery

U.S. Hospital Utilization

A07.9 appeared in too few sampled U.S. inpatient stays in 2023 to report a national estimate (AHRQ suppresses counts of 10 or fewer) — a rare inpatient diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference A07.9 with the canonical source and edition:

A07.9 — Protozoal intestinal disease, unspecified. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/A07.9

Canonical URL: https://icd10codingpro.com/codes/A07.9