G37.9 Demyelinating disease of central nervous system, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Clinically isolated syndromes

Risk adjustment (HCC)

• CMS-HCC V28: HCC 198 — Multiple Sclerosis
• CMS-HCC V22: HCC 77 — Multiple Sclerosis
• ESRD V24: HCC 77

MS-DRG index

Defines the logic of DRG(s) 058-060 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 341.9 Demyelinating disease of central nervous system, unspecified (approximate)

Diagnosis Index entries for G37.9

• 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

Nearby codes

• G37.4 Subacute necrotizing myelitis of central nervous system
• G37.5 Concentric sclerosis [Balo] of central nervous system
• G37.8 Other specified demyelinating diseases of central nervous system
• G37.81 Myelin oligodendrocyte glycoprotein antibody disease
• G37.89 Other specified demyelinating diseases of central nervous system
• G37.9 Demyelinating disease of central nervous system, unspecified (this code)