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B26.85

Mumps arthritis

Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
A00-B99chapter
Excludes1
  • certain localized infections - see body system-related chapters
Excludes2
  • carrier or suspected carrier of infectious disease (Z22.-)Z22.-
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
  • infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
  • influenza and other acute respiratory infections (J00-J22)J00-J22

Excludes1 — never code together. The excluded condition and this one are mutually exclusive.

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 4
B26code
Includes
  • epidemic parotitis
  • infectious parotitis
A00-B99chapter
Includes
  • diseases generally recognized as communicable or transmissible
Use additional code
  • code to identify resistance to antimicrobial drugs (Z16.-)Z16.-
Index entries leading here 2
  • Mumps B26.9
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
Alongside this code 5 same parent — B26.8
B26.81 Mumps hepatitis B26.82 Mumps myocarditis B26.83 Mumps nephritis B26.84 Mumps polyneuropathy B26.89 Other mumps complications
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

CMS22HCC39 CMS28HCC92 ESRD21HCC39 ESRD24HCC39

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
yes
Code set
FY2026
Parent
B26.8
Block
B25-B34
Siblings
5

Present FY2024–FY2027.