A88 – Other viral infections of central nervous system, not elsewhere classified

ICD-10-CM 2027 diagnosis code · Viral and prion infections of the central nervous system

Non-billable header

ICD-10-CM code A88
Code
A88 (claims format: A88)
Description
Other viral infections of central nervous system, not elsewhere classified
Short description
Oth viral infections of central nervous system, NEC
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
1. Certain infectious and parasitic diseases (A00-B99)
Block
A80-A89 Viral and prion infections of the central nervous system

Billable codes under A88

A88 is a header code and cannot be used on claims. Choose the most specific code:

Notes for A88

Excludes1 (not coded here):
  • viral encephalitis NOS (A86)
  • viral meningitis NOS (A87.9)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block A80-A89

Excludes1 (not coded here):
  • postpolio syndrome (G14)
  • sequelae of poliomyelitis (B91)
  • sequelae of viral encephalitis (B94.1)

Frequently asked questions

What is ICD-10 code A88?

A88 is the ICD-10-CM code for other viral infections of central nervous system, not elsewhere classified, in the block A80-A89 (Viral and prion infections of the central nervous system).

Is A88 a billable code?

No. A88 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.