2026 ICD-10-CM Diagnosis Code B81.4Mixed intestinal helminthiases

ICD-10-CM Codes›A00–B99›B65-B83›B81

ICD-10-CM B81.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B81.4 is a billable ICD-10-CM diagnosis code for mixed intestinal helminthiases. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 867 through 869. Coders also document this condition as mixed intestinal infection caused by Cestoda and/or Trematoda and/or Phylum Nematoda. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B81.4
Billable Status
Yes — Valid for Submission
Code Describes
Mixed intestinal helminthiases
Short Description
Mixed intestinal helminthiases
Same as the full description in the CMS dataset.
Parent Code
B81
Other intestinal helminthiases, not elsewhere classified

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB81Other intestinal helminthiases, not elsewhere classified
This CodeB81.4Mixed intestinal helminthiases

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Mixed intestinal infection caused by Cestoda and/or Trematoda and/or Phylum Nematoda

Tabular List NotesGuidance

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

Inclusion Terms

  • Infection due to intestinal helminths classified to more than one of the categories B65.0 B81.3 B81.8
  • Mixed helminthiasis NOS

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.

    • Helminthiasis
      • intestinal
        • mixed types (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)
    • Helminthiasis
      • mixed types (intestinal) (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)
    • Infection, infected, infective(opportunistic)
      • helminths
        • intestinal
          • mixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)
    • Infestation
      • helminth
        • intestinal
          • mixed (types classifiable to more than one of the titles B65.0-B81.3 and B81.8)

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

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 B81.4 to ICD-9-CMHistory

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

ICD-9-CM
127.8 Mixed intestine helminth
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 B81.4Overview

Is B81.4 (Other intestinal helminthiases, not elsewhere classified) a billable code?

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

What MS-DRG does B81.4 group to?

When mixed intestinal helminthiases is the principal diagnosis on an inpatient stay, it groups to MS-DRG 867, 868, 869, with relative weights from 0.7297 to 2.0932 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of B81.4?

Under the General Equivalence Mappings, mixed intestinal helminthiases converts to ICD-9-CM 127.8 (mixed intestine helminth). 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.