G37.9

G37.9: Demyelinating disease of central nervous system, unspecified

Billable / specific codeICD-10-CM

G37.9 is a billable, specific ICD-10-CM code for demyelinating disease of central nervous system, unspecified. It is valid for submission on a claim.

Check G37.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Clinically isolated syndromes

Other codes that can never be billed with G37.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

G35.ARelapsing-remitting multiple sclerosis

Risk adjustment

G37.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 198 Multiple Sclerosis0.647 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

G37.9 is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A53052Billing and Coding: Home Health Speech-Language Pathology
A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56551Billing and Coding: Visual Fields Testing
A56612Billing and Coding: CT of the Head

Alphabetic index entries that lead here

Degeneration, degenerative›myelin, central nervous system
Demyelination, demyelinization›central nervous system
Disease, diseased›demyelinating, demyelinizating(nervous system)
Sclerosis, sclerotic›brain(generalized) (lobular)
Syndrome›clinically isolated
Syndrome›demyelinating

Code history

Unchanged in every release from FY2024 to FY2027.