ICD-10 Code for Leukoencephalitis
The ICD-10-CM code for leukoencephalitis is G04.81 — Other encephalitis and encephalomyelitis. This is the code the Alphabetic Index gives for leukoencephalitis with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
Billable
Which leukoencephalitis code should you use?
The Alphabetic Index lists 5 codes under Leukoencephalitis. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Leukoencephalitis acutehemorrhagic
| postimmunization or postvaccinal | G04.02 | Postimmunization acute disseminated encephalitis, myelitis and encephalomyelitis |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources