2026 ICD-10-CM Diagnosis Code B26Mumps

ICD-10-CM Codes›A00–B99›B25-B34›B26

ICD-10-CM B26
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B26 is a non-billable ICD-10-CM category code for mumps, so it cannot be submitted on claims. Use a more specific code from this category instead, such as B26.0, B26.1, B26.2, and B26.3.

Code Identity

ICD-10-CM Code
B26
Billable Status
No — Non-Billable Category
Code Describes
Mumps
Chapter
B25-B34
Other viral diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB25-B34Other viral diseases
CategoryB26Mumps
This CodeB26Mumps

Specific Coding for MumpsOverview

Non-specific codes like B26 require more characters. Use one of these billable codes instead:

  • Use B26.0 for Mumps orchitis

  • Use B26.1 for Mumps meningitis

  • Use B26.2 for Mumps encephalitis

  • Use B26.3 for Mumps pancreatitis

  • B26.8 for Mumps with other complications

  • Use B26.81 for Mumps hepatitis

  • Use B26.82 for Mumps myocarditis

  • Use B26.83 for Mumps nephritis

  • Use B26.84 for Mumps polyneuropathy

  • Use B26.85 for Mumps arthritis

  • Use B26.89 for Other mumps complications

  • Use B26.9 for Mumps without complication

Tabular List NotesGuidance

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

Includes

  • epidemic parotitis
  • infectious parotitis

Clinical InformationClinical

  • Measles-Mumps-Rubella Vaccine

    a combined vaccine used to prevent measles; mumps; and rubella.

  • Mumps

    an acute infectious disease caused by rubulavirus, spread by direct contact, airborne droplet nuclei, fomites contaminated by infectious saliva, and perhaps urine, and usually seen in children under the age of 15, although adults may also be affected. (from dorland, 28th ed)

  • Mumps Vaccine

    vaccines used to prevent infection by mumps virus. best known is the live attenuated virus vaccine of chick embryo origin, used for routine immunization of children and for immunization of adolescents and adults who have not had mumps or been immunized with live mumps vaccine. children are usually immunized with measles-mumps-rubella combination vaccine.

  • Mumps virus

    the type species of rubulavirus that causes an acute infectious disease in humans, affecting mainly children. transmission occurs by droplet infection.

  • Viral Fusion Proteins

    proteins, usually glycoproteins, found in the viral envelopes of a variety of viruses. they promote cell membrane fusion and thereby may function in the uptake of the virus by cells.

  • Rubulavirus

    a genus of the family paramyxoviridae (subfamily paramyxovirinae) where all the species have hemagglutinin and neuraminidase activities but lack a c protein. mumps virus is the type species.

Patient EducationClinical

Mumps

Mumps is an illness caused by the mumps virus. It starts with:

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 B26Overview

Is B26 (Mumps) a billable code?

No. This is a category header that groups the codes for mumps, and headers cannot be submitted on claims. Claims for mumps need a more specific code from this category, such as B26.0, B26.1, and B26.2.