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B00.4

Billable

Herpesviral encephalitis

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A serious brain infection caused by herpes simplex virus that can cause fever, confusion, seizures, and altered consciousness.

Coding Tips

  • •This is a medical emergency; verify encephalitis is clearly documented
  • •Distinguish from meningitis (B00.3) - encephalitis involves brain tissue inflammation

Excludes 1 — Do NOT code together

  • herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)
  • non-simplex herpesviral encephalitis (B10.0-)

Code Hierarchy

└B00Herpesviral [herpes simplex] infections└B00.4Herpesviral encephalitis
└B00.4Herpesviral encephalitis

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