2026 ICD-10-CM Diagnosis Code B74Filariasis

ICD-10-CM Codes›A00–B99›B65-B83›B74

ICD-10-CM B74
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B74 is a non-billable ICD-10-CM category code for filariasis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B74.0, B74.1, B74.2, and B74.3.

Code Identity

ICD-10-CM Code
B74
Billable Status
No — Non-Billable Category
Code Describes
Filariasis
Chapter
B65-B83
Helminthiases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB65-B83Helminthiases
CategoryB74Filariasis
This CodeB74Filariasis

Specific Coding for FilariasisOverview

Non-specific codes like B74 require more characters. Use one of these billable codes instead:

  • Use B74.0 for Filariasis due to Wuchereria bancrofti

  • Use B74.1 for Filariasis due to Brugia malayi

  • Use B74.2 for Filariasis due to Brugia timori

  • Use B74.3 for Loiasis

  • Use B74.4 for Mansonelliasis

  • Use B74.8 for Other filariases

  • Use B74.9 for Filariasis, unspecified

Tabular List NotesGuidance

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

Type 2 Excludes

  • onchocerciasis B73
  • tropical pulmonary eosinophilia NOS J82.89

Clinical InformationClinical

  • Elephantiasis, Filarial

    parasitic infestation of the human lymphatic system by wuchereria bancrofti or brugia malayi. it is also called lymphatic filariasis.

  • Filariasis

    infections with nematodes of the superfamily filarioidea. the presence of living worms in the body is mainly asymptomatic but the death of adult worms leads to granulomatous inflammation and permanent fibrosis. organisms of the genus elaeophora infect wild elk and domestic sheep causing ischemic necrosis of the brain, blindness, and dermatosis of the face.

  • Loiasis

    a parasitic infection caused by the nematode loa loa. the vector in the transmission of this infection is the horsefly (tabanus) or the deerfly or mango fly (chrysops). the larvae may be seen just beneath the skin or passing through the conjunctiva. eye lesions are not uncommon. the disease is generally mild and painless.

  • Filarioidea

    a superfamily of nematodes of the order spirurida. members possess a filiform body and a mouth surrounded by papillae.

  • Filariasis

    infection by filarial worms.

  • Lymphatic Filariasis|Elephantiasis

    a clinical disorder that is caused by obstruction of the lymphatic system years after filarial infection. it is characterized by painful and profound lymphedema, resulting in significant swelling (elephantiasis) of extremities and genitals.

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.

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 B74Overview

Is B74 (Filariasis) a billable code?

No. This is a category header that groups the codes for filariasis, and headers cannot be submitted on claims. Claims for filariasis need a more specific code from this category, such as B74.0, B74.1, and B74.2.