M85
ICD-10Non-billable categoryOther disorders of bone density and structure
Official ICD-10-CM descriptor (FY2026)
Other disorders of bone density and structure
M85 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.
- osteogenesis imperfecta (Q78.0)
- osteopetrosis (Q78.2)
- osteopoikilosis (Q78.8)
- polyostotic fibrous dysplasia (Q78.1)
More specific codes under M85
- M85.0Fibrous dysplasia (monostotic)category
- 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
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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.