2026 ICD-10-CM Diagnosis Code B83.0Visceral larva migrans

ICD-10-CM Codes›A00–B99›B65-B83›B83

ICD-10-CM B83.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B83.0 is a billable ICD-10-CM diagnosis code for visceral larva migrans. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Parasitic, other specified and unspecified infections.

Code Identity

ICD-10-CM Code
B83.0
Billable Status
Yes — Valid for Submission
Code Describes
Visceral larva migrans
Short Description
Visceral larva migrans
Same as the full description in the CMS dataset.
Parent Code
B83
Other helminthiases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB83Other helminthiases
This CodeB83.0Visceral larva migrans

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cerebrospinal nematodiasis
  • Extrapulmonary paragonimiasis
  • Gnathostomal visceral larva migrans
  • Infection by Gnathostoma
  • Infection by Paragonimus
  • Infection by Toxocara canis
  • Infection by Toxocara cati
  • Infection caused by Toxocara
  • Larval gnathostomiasis
  • Nematode myositis
  • Ocular toxocariasis
  • Paragonimus larva migrans
  • Parasitic chorioretinitis
  • Parasitic endophthalmitis
  • Parasitic myositis
  • Toxicariasis of the central nervous system
  • Toxocara chorioretinitis
  • Toxocara endophthalmitis
  • Toxocara granuloma
  • Toxocara larva migrans of skin
  • Toxocara meningitis
  • Toxocariasis myositis
  • Visceral larva migrans syndrome

Tabular List NotesGuidance

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

Inclusion Terms

  • Toxocariasis

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.

    • Endophthalmitis(acute) (infective) (metastatic) (subacute)
      • in (due to)
        • toxocariasis
    • Infection, infected, infective(opportunistic)
      • Toxocara (canis) (cati) (felis)
    • Infestation
      • helminth
        • visceral larva migrans
    • Infestation
      • Toxocara (canis) (cati) (felis)
    • Larva migrans
      • visceral
    • Syndrome
      • visceral larva migrans
    • Toxocariasis

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

  • Visceral Larva Migrans

    a parasitic infection caused by worms found in domestic animals. in humans nematode larvae enter the portal system from the small intestine and disseminate in visceral organs causing inflammatory reactions. signs and symptoms include eosinophilia, hepatomegaly, splenomegaly, and lung infections.

  • Parasitic Endophthalmitis

    infection of the interior of the eye, especially the aqueous and/or vitreous humor, by a parasite.

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 B83.0 to ICD-9-CMHistory

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

ICD-9-CM
128.0 Toxocariasis
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 B83.0Overview

Is B83.0 (Other helminthiases) a billable code?

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

What MS-DRG does B83.0 group to?

When visceral larva migrans 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 B83.0?

Under the General Equivalence Mappings, visceral larva migrans converts to ICD-9-CM 128.0 (toxocariasis). 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.