M85.0
ICD-10Non-billable categoryFibrous dysplasia (monostotic)
Official ICD-10-CM descriptor (FY2026)
Fibrous dysplasia (monostotic)
M85.0 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.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- fibrous dysplasia of jaw (M27.8)
ICD-10-CM FY2026 defines 10 codes beneath M85.0. See the ICD-10-CM index for what this site publishes.
Related codes in M85
- M85.1Skeletal fluorosiscategory
- M85.2Hyperostosis of skull
- M85.3Osteitis condensanscategory
- M85.4Solitary bone cystcategory
- M85.5Aneurysmal bone cystcategory
- M85.6Other cyst of bonecategory
- M85.8Other specified disorders of bone density and structurecategory
- M85.9Disorder of bone density and structure, unspecified
Where this code sits
- Parent code
- M85
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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.