G35.B – Primary progressive multiple sclerosis
ICD-10-CM 2027 diagnosis code · Demyelinating diseases of the central nervous system
ICD-10-CM code
G35.B
- Code
G35.B(claims format:G35B)- Description
- Primary progressive multiple sclerosis
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 6. Diseases of the nervous system (G00-G99)
- Block
- G35-G37 Demyelinating diseases of the central nervous system
- Parent codes
- G35
Billable codes under G35.B
G35.B is a header code and cannot be used on claims. Choose the most specific code:
Related codes in G35
Frequently asked questions
What is ICD-10 code G35.B?
G35.B is the ICD-10-CM code for primary progressive multiple sclerosis, in the block G35-G37 (Demyelinating diseases of the central nervous system).
Is G35.B a billable code?
No. G35.B is a header code with more specific child codes; report one of the billable codes listed above.
What category does G35.B belong to?
It belongs to category G35 – Multiple sclerosis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.