ICD-10 Code for Leukoencephalopathy

The default ICD-10-CM 2027 code for leukoencephalopathy is G93.49 – Other encephalopathy. More specific codes depend on the details documented, as listed in the official index (12 codes, 12 billable).

Main code: G93.49 – Other encephalopathy
Billable: Yes
See also: Encephalopathy

Index entries for Leukoencephalopathy

with
- brainstem - spinal cord involvement - lactate elevation – E88.43
- calcifications and cysts – G93.43
- thalamus - brainstem involvement - high lactate – E88.43
adult-onset, with axonal spheroids (and pigmented glia) – G93.44
Binswanger's – I67.3
heroin vapor – G92.8
megalencephalic, with subcortical cysts – G93.42
metachromatic – E75.25
multifocal (progressive) – A81.2
postimmunization and postvaccinal – G04.02
progressive multifocal – A81.2
reversible, posterior – G93.6
van Bogaert's (sclerosing) – A81.1
vascular, progressive – I67.3

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.