M35
ICD-10Non-billable categoryOther systemic involvement of connective tissue
Official ICD-10-CM descriptor (FY2026)
Other systemic involvement of connective tissue
M35 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- reactive perforating collagenosis (L87.1)
More specific codes under M35
- M35.0Sjogren syndromecategory
- M35.1Other overlap syndromes
- M35.2Behcet's disease
- M35.3Polymyalgia rheumatica
- M35.4Diffuse (eosinophilic) fasciitis
- M35.5Multifocal fibrosclerosis
- M35.6Relapsing panniculitis [Weber-Christian]
- M35.7Hypermobility syndrome
- M35.8Other specified systemic involvement of connective tissuecategory
- M35.9Systemic involvement of connective tissue, unspecified
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.