2026 ICD-10-CM Diagnosis Code B80Enterobiasis

ICD-10-CM Codes›A00–B99›B65-B83›B80

ICD-10-CM B80
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B80 is a billable ICD-10-CM diagnosis code for enterobiasis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. Coders also document this condition as dermatosis of perianal region caused by Enterobius vermicularis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B80
Billable Status
Yes — Valid for Submission
Code Describes
Enterobiasis
Chapter
B65-B83
Helminthiases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB80Enterobiasis
This CodeB80Enterobiasis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Dermatosis of perianal region caused by Enterobius vermicularis
  • Disease caused by Oxyuroidea
  • Enterobiasis
  • Infection by Enterobius vermicularis
  • Infection by Physaloptera
  • Infection by Physaloptera caucasica

Tabular List NotesGuidance

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

Includes

  • oxyuriasis
  • pinworm infection
  • threadworm infection

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.

    • Appendicopathia oxyurica
    • Disease, diseased
      • pinworm
    • Enterobiasis
    • Enterobius vermicularis(infection) (infestation)
    • Infection, infected, infective(opportunistic)
      • Enterobius vermicularis
    • Infection, infected, infective(opportunistic)
      • Oxyuris vermicularis
    • Infection, infected, infective(opportunistic)
      • pinworm
    • Infection, infected, infective(opportunistic)
      • threadworm
    • Infestation
      • Enterobius vermicularis
    • Infestation
      • helminth
        • intestinal
          • enterobiasis
    • Infestation
      • nematode NEC (intestinal)
        • Enterobius vermicularis
    • Infestation
      • nematode NEC (intestinal)
        • physaloptera
    • Infestation
      • Oxyuris vermicularis
    • Infestation
      • pinworm
    • Infestation
      • threadworm
    • Oxyuriasis
    • Oxyuris vermicularis(infestation)
    • Pinworm(disease) (infection) (infestation)
    • Seatworm(infection) (infestation)
    • Threadworm(infection) (infestation)
    • Vaginitis(acute) (circumscribed) (diffuse) (emphysematous) (nonvenereal) (ulcerative)
      • in (due to)
        • pinworm infection

Clinical ClassificationClinical

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

CCSR INF009
Parasitic, other specified and unspecified infections
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Enterobiasis

    infection with nematodes of the genus enterobius; e. vermicularis, the pinworm of man, causes a crawling sensation and pruritus. this condition results in scratching the area, occasionally causing scarification.

Patient EducationClinical

Parasitic 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 the full article at MedlinePlus

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

Convert B80 to ICD-9-CMHistory

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

ICD-9-CM
127.4 Enterobiasis
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 B80Overview

Is B80 (Enterobiasis) a billable code?

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

What MS-DRG does B80 group to?

When enterobiasis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B80?

Under the General Equivalence Mappings, enterobiasis converts to ICD-9-CM 127.4 (enterobiasis). 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.