B26
B26 — Mumps
Non-billable headerICD-10-CM
B26 is a non-billable header ICD-10-CM code for mumps. It cannot be billed on its own: choose one of the more specific child codes below.
Includes
Conditions this code covers.
- epidemic parotitis
- infectious parotitis
Other codes that can never be billed with B26
These codes carry an Excludes1 note pointing at B26. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading B26 alone.
- G02Meningitis in other infectious and parasitic diseases classified elsewhere
- G05Encephalitis, myelitis and encephalomyelitis in diseases classified elsewhere
- G63Polyneuropathy in diseases classified elsewhere
- I41Myocarditis in diseases classified elsewhere
- K11.2Sialoadenitis
- K77Liver disorders in diseases classified elsewhere
- K87Disorders of gallbladder, biliary tract and pancreas in diseases classified elsewhere
- A85Other viral encephalitis, not elsewhere classified
Risk adjustment
B26 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
B26 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead B26
6 child codes. Green means billable.
Questions about B26
- Is B26 a billable ICD-10-CM code?
- No. B26 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does B26 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Other viral diseases (B25-B34).