M35.9

Billable

Systemic involvement of connective tissue, unspecified

M35.9 is the ICD-10-CM code for Systemic involvement of connective tissue, unspecified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
M00-M99
Parent
M35
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Includes

  • Autoimmune disease (systemic) NOS
  • Collagen (vascular) disease NOS

Frequently asked questions

What is ICD-10 code M35.9?
M35.9 is the ICD-10-CM code for "Systemic involvement of connective tissue, unspecified". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M35.9 a billable code?
Yes — M35.9 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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