MCMCB Pro
A87

A87Viral meningitis

Non-billable headerICD-10-CM

A87 is a non-billable header ICD-10-CM code for viral meningitis. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • meningitis due to herpesvirus [herpes simplex] (B00.3)
  • meningitis due to herpesvirus [herpes simplex] (B00.3)
  • meningitis due to measles virus (B05.1)
  • meningitis due to mumps virus (B26.1)
  • meningitis due to poliomyelitis virus (A80.-)
  • meningitis due to zoster (B02.1)

Other codes that can never be billed with A87

These codes carry an Excludes1 note pointing at A87. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A87 alone.

  • A85Other viral encephalitis, not elsewhere classified
  • A88Other viral infections of central nervous system, not elsewhere classified

Risk adjustment

A87 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 to one of these instead A87

5 child codes. Green means billable.

Questions about A87

Is A87 a billable ICD-10-CM code?
No. A87 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A87 sit in the tabular list?
Certain infectious and parasitic diseases (A00-B99), in the block Viral and prion infections of the central nervous system (A80-A89).
What cannot be coded together with A87?
A87 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.