2026 ICD-10-CM Diagnosis Code B70.0Diphyllobothriasis

ICD-10-CM Codes›A00–B99›B65-B83›B70

ICD-10-CM B70.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B70.0 is a billable ICD-10-CM diagnosis code for diphyllobothriasis. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B70.0
Billable Status
Yes — Valid for Submission
Code Describes
Diphyllobothriasis
Short Description
Diphyllobothriasis
Same as the full description in the CMS dataset.
Parent Code
B70
Diphyllobothriasis and sparganosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB70Diphyllobothriasis and sparganosis
This CodeB70.0Diphyllobothriasis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Diphyllobothriasis
  • Disease caused by cestode of Diphyllobothriidea
  • Disease caused by Diphyllobothriidae
  • Infection by Bothriocephalus
  • Infection by Braunia
  • Infection by Cyathocephalus
  • Infection by Digramma
  • Infection by Diphyllobothrium latum
  • Infection by Diphyllobothrium pacificum
  • Infection by Ligula
  • Infection by Schistocephalus
  • Infection by Triaenophorus
  • Intestinal diphyllobothriasis
  • Megaloblastic anemia caused by fish tapeworm

Tabular List NotesGuidance

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

Inclusion Terms

  • Diphyllobothrium (adult) (latum) (pacificum) infection
  • Fish tapeworm (infection)

Type 2 Excludes

  • larval diphyllobothriasis B70.1

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)
      • bothriocephalus
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • dibothriocephalus
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • Diphyllobothrium (Dibothriocephalus)
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • due to (in) (with)
        • fish tapeworm (D. latum) infestation
    • Anemia(essential) (general) (hemoglobin deficiency) (infantile) (primary) (profound)
      • fish tapeworm (D. latum) infestation
    • Bothriocephalus latus infestation
    • Dibothriocephalus, dibothriocephaliasis(latus) (infection) (infestation)
    • Diphyllobothriasis(intestine)
    • Infection, infected, infective(opportunistic)
      • Diphyllobothrium (adult) (latum) (pacificum)
    • Infection, infected, infective(opportunistic)
      • fish tapeworm
    • Infestation
      • Bothriocephalus (latus)
    • Infestation
      • broad tapeworm
    • Infestation
      • Dibothriocephalus (latus)
    • Infestation
      • Diphyllobothrium (adult) (latum) (intestinal) (pacificum)
    • Infestation
      • fish tapeworm
    • Infestation
      • tapeworm
        • broad
    • Infestation
      • tapeworm
        • fish

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

  • Diphyllobothriasis

    infection with tapeworms of the genus diphyllobothrium.

  • Diphyllobothriasis

    an infection that is caused by the tapeworm diphyllobothrium latum and related species; it is transmitted via consumption of raw or undercooked fish, and symptoms include abdominal discomfort, diarrhea, vomiting, fatigue, weight loss, and vitamin b12 deficiency.

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 B70.0 to ICD-9-CMHistory

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

ICD-9-CM
123.4 Diphyllobothrias intest
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 B70.0Overview

Is B70.0 (Diphyllobothriasis and sparganosis) a billable code?

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

What MS-DRG does B70.0 group to?

When diphyllobothriasis 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 B70.0?

Under the General Equivalence Mappings, diphyllobothriasis converts to ICD-9-CM 123.4 (diphyllobothrias intest). 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.