M35
⚠ Non-billable
Other systemic involvement of connective tissue
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M35
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M35?
ICD-10-CM code M35 represents Other systemic involvement of connective tissue. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M35 billable?
No. M35 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is M35 in?
M35 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M35 category
M35.0
Sjogren syndrome
Non-billable
M35.1
Other overlap syndromes
Billable
M35.2
Behcet's disease
Billable
M35.3
Polymyalgia rheumatica
Billable
M35.4
Diffuse (eosinophilic) fasciitis
Billable
M35.5
Multifocal fibrosclerosis
Billable
M35.6
Relapsing panniculitis [Weber-Christian]
Billable
M35.7
Hypermobility syndrome
Billable
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