ICD-10-CM 2027 diagnosis code

A88Other viral infections of central nervous system, not elsewhere classified

Not billable — use a more specific code

A88 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.Short description: Oth viral infections of central nervous system, NEC

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About A88

A88 is the ICD-10-CM diagnosis code for other viral infections of central nervous system, not elsewhere classified. It belongs to block A80-A89 (viral and prion infections of the central nervous system) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: A88.0 (exanthem]), A88.1 (vertigo) and A88.8 (system).

Don't report A88 together with the conditions in its Excludes1 note: viral encephalitis NOS (A86) and viral meningitis NOS (A87.9).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under A88

Coding notes

Excludes1Not coded here — never report together with this code

viral encephalitis NOS (A86)
viral meningitis NOS (A87.9)

Notes that apply from higher levels

Instructions written at a parent level also apply to A88.

Broader instructions also apply from A80-A89 Viral and prion infections of the central nervous system and Chapter 1: Certain infectious and parasitic diseases.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about A88

Is A88 billable?: No. A88 is a header code. Report one of its more specific subcodes instead.