ICD-10-CM 2027
ICD-10 code for multiple sclerosis
From the official ICD-10-CM alphabetic index entry “Sclerosis, sclerotic › multiple (brain stem) (cerebral) (disseminated) (generalized) (spinal cord)”. Page updated September 29, 2026.
About coding multiple sclerosis
The ICD-10-CM code for multiple sclerosis is G35.D (Multiple sclerosis, unspecified). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on G35.D.
Within G35, choose G35.D (unspecified) only when documentation doesn't support a more specific option: Relapsing-remitting multiple sclerosis (G35.A), primary progressive multiple sclerosis (G35.B) and secondary progressive multiple sclerosis (G35.C).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 058 (Multiple Sclerosis and Cerebellar Ataxia with MCC, relative weight 1.8438), DRG 059 (Multiple Sclerosis and Cerebellar Ataxia with CC, relative weight 1.2002) and DRG 060 (Multiple Sclerosis and Cerebellar Ataxia without CC/MCC, relative weight 0.9247), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific multiple sclerosis codes (official index)
- progressive
- primary G35.B0 — Primary progressive multiple sclerosis, unspecified
- with
- evidence of inflammatory disease activity G35.B1 — Active primary progressive multiple sclerosis
- active G35.B1 — Active primary progressive multiple sclerosis
- non-active G35.B2 — Non-active primary progressive multiple sclerosis
- without evidence of inflammatory disease activity G35.B2 — Non-active primary progressive multiple sclerosis
- secondary G35.C0 — Secondary progressive multiple sclerosis, unspecified
- with
- evidence of inflammatory disease activity G35.C1 — Active secondary progressive multiple sclerosis
- active G35.C1 — Active secondary progressive multiple sclerosis
- non-active G35.C2 — Non-active secondary progressive multiple sclerosis
- without evidence of inflammatory disease activity G35.C2 — Non-active secondary progressive multiple sclerosis
- relapsing-remitting G35.A — Relapsing-remitting multiple sclerosis
Common questions about multiple sclerosis ICD-10 codes
What is the ICD-10 code for multiple sclerosis?
- G35.D — Multiple sclerosis, unspecified. More specific codes apply when the documentation supports them: G35.B0, G35.B1, G35.B1, G35.B2 and others below.
What is the ICD-10 code for relapsing-remitting multiple sclerosis?
- G35.A — Relapsing-remitting multiple sclerosis.
Is G35.D billable?
- Yes. G35.D is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G35.D be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G35.D as a principal diagnosis.
Is G35.D a CC or MCC?
- No. G35.D is neither a CC nor an MCC under MS-DRG v44.0.