M35.1
Billable codeOther overlap syndromes
The ICD-10 code for other overlap syndromes is M35.1.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
- polyangiitis overlap syndrome (M30.8)
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Mixed connective tissue disease
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- M35.0Sjögren syndromenon-billable header
- M35.2Behçet'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 tissuenon-billable header
- M35.9Systemic involvement of connective tissue, unspecified
- M35.1Other overlap syndromes
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7108Approximate match
Associated MS-DRGs
M35.1 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.