ICD-10-CM 2027 diagnosis code
A87.2Lymphocytic choriomeningitis
A87.2 is a valid, billable ICD-10-CM code for lymphocytic choriomeningitis. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.
Looking up by condition? See ICD-10 code for Choriomeningitis, ICD-10 code for Chorioencephalitis.
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 A87.2
A87.2 is the ICD-10-CM diagnosis code for lymphocytic choriomeningitis. It belongs to category A87 (viral meningitis), block A80-A89 (viral and prion infections of the central nervous system) and chapter 1 (certain infectious and parasitic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.
Within A87 (viral meningitis), A87.2 is specifically for lymphocytic choriomeningitis. Related codes cover enteroviral meningitis (A87.0), adenoviral meningitis (A87.1), other viral meningitis (A87.8) and unspecified (A87.9).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 075 (Viral Meningitis with CC/MCC, relative weight 1.7707) and DRG 076 (Viral Meningitis without CC/MCC, relative weight 0.8675), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Before ICD-10, this condition was coded in ICD-9-CM as 049.0 (lymphocytic choriomeningitis).
Coding notes
- Lymphocytic meningoencephalitis
Notes that apply from higher levels
Instructions written at a parent level also apply to A87.2.
› From A87 Viral meningitis
Broader instructions also apply from A80-A89 Viral and prion infections of the central nervous system and Chapter 1: Certain infectious and parasitic diseases.
Alphabetic index entries
8 entriesTerms in the official ICD-10-CM index that lead to A87.2.
- Chorioencephalitis (acute) (lymphocytic) (serous)
- Choriomeningitis (acute) (lymphocytic) (serous)
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › lymphatica
- Lymphocytic › chorioencephalitis (acute) (serous)
- Lymphocytic › choriomeningitis (acute) (serous)
- Lymphocytic › meningoencephalitis
- Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) › lymphocytic (acute) (benign) (serous)
- Meningoencephalitis › lymphocytic (serous)
Codes whose notes reference A87.2
- A85Excludes1
MS-DRG v44.0 grouping
All DRGs →Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.
MDC 01 · Diseases and Disorders of the Nervous System
ICD-9-CM equivalent
Converter →- 049.0Lymphocytic choriomeningitisexact
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about A87.2
Is A87.2 billable?
- Yes. A87.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can A87.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict A87.2 as a principal diagnosis.
Is A87.2 a CC or MCC?
- A87.2 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does A87.2 group to?
- A87.2 is used in the MS-DRG v44.0 logic for MS-DRG 075 (Viral Meningitis with CC/MCC) and MS-DRG 076 (Viral Meningitis without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.
What is the ICD-9 code for A87.2?
- The CMS General Equivalence Mappings map A87.2 to ICD-9-CM 049.0.