M35.8 – Other specified systemic involvement of connective tissue
ICD-10-CM 2027 diagnosis code · Systemic connective tissue disorders
- Code
M35.8(claims format:M358)- Description
- Other specified systemic involvement of connective tissue
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
- Block
- M30-M36 Systemic connective tissue disorders
- Parent codes
- M35
Billable codes under M35.8
M35.8 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
M35 – Other systemic involvement of connective tissue
- reactive perforating collagenosis (L87.1)
Block M30-M36
- autoimmune disease NOS
- collagen (vascular) disease NOS
- systemic autoimmune disease
- systemic collagen (vascular) disease
- autoimmune disease, single organ or single cell-type -code to relevant condition category
Related codes in M35
- M35.0 – Sjogren syndromeHeader
- M35.1 – Other overlap syndromesBillable
- M35.2 – Behcet's diseaseBillable
- M35.3 – Polymyalgia rheumaticaBillable
- M35.4 – Diffuse (eosinophilic) fasciitisBillable
- M35.5 – Multifocal fibrosclerosisBillable
- M35.6 – Relapsing panniculitis [Weber-Christian]Billable
- M35.7 – Hypermobility syndromeBillable
- M35.9 – Systemic involvement of connective tissue, unspecifiedBillable
Frequently asked questions
What is ICD-10 code M35.8?
M35.8 is the ICD-10-CM code for other specified systemic involvement of connective tissue, in the block M30-M36 (Systemic connective tissue disorders).
Is M35.8 a billable code?
No. M35.8 is a header code with more specific child codes; report one of the billable codes listed above.
What category does M35.8 belong to?
It belongs to category M35 – Other systemic involvement of connective tissue.
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.