2027 ICD-10-CM Diagnosis Code B74Filariasis

ICD-10-CM Codes›A00–B99›B65-B83›B74

ICD-10-CM B74
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Filariasis
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B74: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • diseases generally recognized as communicable or transmissible

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On B74 itself
  • onchocerciasis (B73)
  • tropical (pulmonary) eosinophilia NOS (J82.89)
From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • carrier or suspected carrier of infectious disease (Z22.-)
  • certain localized infections - see body system-related chapters
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)
  • influenza and other acute respiratory infections (J00-J22)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 1 (A00-B99) Certain infectious and parasitic diseases applies to 1,068 codes
  • code to identify resistance to antimicrobial drugs (Z16.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name B74, its category, or a range that includes it.

Applicable To 1

These notes mention B74.

  • B81.4 Mixed intestinal helminthiases
    Infection due to intestinal helminths classified to more than one of the categories B65.0-B81.3 and B81.8 names B65.0-B81.3, which includes this code

Excludes1 2

These codes carry an Excludes1 note naming B74: they are not reported together with it, unless the two conditions are unrelated.

  • I89 Other noninfective disorders of lymphatic vessels and lymph nodes
    filarial chylocele (B74.-)
  • R82.0 Chyluria
    filarial chyluria (B74.-)

Code First 1

These codes say to code first a condition named in the note, and B74 is one of the conditions named.

  • K67 Disorders of peritoneum in infectious diseases classified elsewhere
    helminthiasis (B65.0 -B83.9) names B65.0 -B83.9, which includes this code

Clinical InformationClinical

  • 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.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About B74Overview

What is the ICD-10 code for filariasis?

B74 is the ICD-10-CM category for filariasis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.