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M35.4

M35.4: Diffuse (eosinophilic) fasciitis

Billable / specific codeICD-10-CM

M35.4 is a billable, specific ICD-10-CM code for diffuse (eosinophilic) fasciitis. It is valid for submission on a claim.

Check M35.4 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above M35.4

A category’s note binds every code beneath it.

Written on M35: Other systemic involvement of connective tissue

  • reactive perforating collagenosis (L87.1)

Other codes that can never be billed with M35.4

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • M72.8Other fibroblastic disorders

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

M35.4 is named in 19 Medicare coverage policies: 12 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Alphabetic index entries that lead here

  • Fasciitis›diffuse(eosinophilic)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under M35

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.