2027 ICD-10-CM Diagnosis Code B26Mumps

ICD-10-CM Codes›A00–B99›B25-B34›B26

ICD-10-CM B26
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to B26: 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.

On B26 itself
  • epidemic parotitis
  • infectious parotitis
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.

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 B26, its category, or a range that includes it.

Applicable To 1

These notes mention B26.

  • O98.5 Other viral diseases complicating pregnancy, childbirth and the puerperium
    Conditions in A80-B09, B25-B34, R87.81-, R87.82- names B25-B34, which includes this code

Excludes1 2

These codes carry an Excludes1 note naming B26: they are not reported together with it, unless the two conditions are unrelated.

Clinical InformationClinical

  • 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)

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

Questions About B26Overview

What is the ICD-10 code for mumps?

B26 is the ICD-10-CM category for mumps, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.