Leukodystrophy

This code signifies a group of rare, progressive, genetic, metabolic disorders that affect the brain, spinal cord, and often the peripheral nerves. These conditions are characterized by the abnormal development or destruction of the myelin sheath, the protective covering around nerve fibers, leading to impaired neurological function.

Use this code for documented cases of leukodystrophy, a primary disorder of white matter. This diagnosis is typically supported by neurological examination findings, neuroimaging (e.g., MRI showing white matter abnormalities), and often genetic testing confirming a specific leukodystrophy subtype.

• Do not use this code for demyelinating diseases like multiple sclerosis, which have distinct ICD-9-CM codes.
• Ensure documentation specifies "leukodystrophy" rather than general white matter disease to support this specific code.
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, especially for diagnostic workups or management of the condition itself.