A87.2 — Lymphocytic choriomeningitis
A87.2 is a billable, specific ICD-10-CM code for lymphocytic choriomeningitis. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Lymphocytic meningoencephalitis
Excludes1 inherited from the categories above A87.2
These are not written on A87.2, but they bind it: a note on a category applies to every code beneath it. Billing A87.2 with anything listed here is a denial.
Other codes that can never be billed with A87.2
These codes carry an Excludes1 note pointing at A87.2. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A87.2 alone.
- A85Other viral encephalitis, not elsewhere classified
Risk adjustment
A87.2 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.
Medicare coverage
A87.2 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57206Billing and Coding: Lumbar MRI
How A87.2 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A87.2.
- Chorioencephalitis(acute) (lymphocytic) (serous)
- Choriomeningitis(acute) (lymphocytic) (serous)
- Encephalitis›lymphatica
- Lymphocytic›chorioencephalitis(acute) (serous)
- Lymphocytic›choriomeningitis(acute) (serous)
- Lymphocytic›meningoencephalitis
- Meningitis›lymphocytic(acute) (benign) (serous)
- Meningoencephalitis›lymphocytic(serous)
Code history
A87.2 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share A87. If A87.2 is not quite right, the correct code is usually one of these.
Questions about A87.2
- Is A87.2 a billable ICD-10-CM code?
- Yes. A87.2 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A87.2 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 A87.2?
- A87.2 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above A87.2 (A87) and apply to it just the same.