ICD-10-CM 2027
ICD-10 code for Periaxial encephalitis
From the official ICD-10-CM alphabetic index entry “Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) › periaxial”. Page updated September 29, 2026.
About coding Periaxial encephalitis
The ICD-10-CM code for Periaxial encephalitis is G37.0 (Diffuse sclerosis of central nervous system).
Within G37 (other demyelinating diseases of central nervous system), G37.0 is specifically for diffuse sclerosis of central nervous system. Related codes cover central demyelination of corpus callosum (G37.1), central pontine myelinolysis (G37.2), acute transverse myelitis in demyelinating disease of central nervous system (G37.3), subacute necrotizing myelitis of central nervous system (G37.4), Concentric sclerosis [Balo] of central nervous system (G37.5), other specified demyelinating diseases of central nervous system (G37.8) and demyelinating disease of central nervous system, unspecified (G37.9).
Don't report G37.0 together with the conditions in its Excludes1 note: X linked adrenoleukodystrophy (E71.52-).
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Don't confuse with (Excludes1 for G37.0)
- X linked adrenoleukodystrophy (E71.52-)
Common questions about Periaxial encephalitis ICD-10 codes
What is the ICD-10 code for Periaxial encephalitis?
- G37.0 — Diffuse sclerosis of central nervous system.
Is G37.0 billable?
- Yes. G37.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G37.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G37.0 as a principal diagnosis.
Is G37.0 a CC or MCC?
- G37.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.