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M85.0

M85.0: Fibrous dysplasia (monostotic)

Non-billable headerICD-10-CM

M85.0 is a non-billable header ICD-10-CM code for fibrous dysplasia (monostotic). It cannot be billed on its own: choose one of the more specific child codes below.

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • fibrous dysplasia of jaw (M27.8)

Excludes1 inherited from the categories above M85.0

A category’s note binds every code beneath it.

Written on M85: Other disorders of bone density and structure

  • osteogenesis imperfecta (Q78.0)
  • osteopetrosis (Q78.2)
  • osteopoikilosis (Q78.8)
  • polyostotic fibrous dysplasia (Q78.1)

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead M85.0

10 child codes. Green means billable.

Other codes under M85

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.