ICD-10 Code G37 – Other demyelinating diseases of central nervous system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G37 – Other demyelinating diseases of central nervous system
What it is
G37 identifies demyelinating disorders of the central nervous system that do not fit a more specific ICD-10 category. Use it when documentation confirms a CNS demyelinating disease, but the exact type is not named.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include neurologic deficits from impaired myelin function, such as weakness, sensory changes, coordination problems, or visual symptoms.
When to use this code
Use G37 when the provider documents an “other” demyelinating CNS disease and no more specific code applies. It is appropriate when the record supports a demyelinating process, but the diagnosis is not clearly multiple sclerosis or another named disorder.
If the note is vague, confirm the exact diagnosis before coding. Check documentation for the specific demyelinating condition, affected site, and any stated exclusions.
Do not use for
Do not use G37 for multiple sclerosis or for demyelinating diseases with a more specific ICD-10 code. If the condition is only suspected or not documented as a CNS demyelinating disease, check documentation.
Coding tip
Code G37 only when the provider clearly documents an unspecified or other CNS demyelinating disorder and no narrower diagnosis is supported.