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M85.9

✓ Billable

Disorder of bone density and structure, unspecified

Diseases of the musculoskeletal system and connective tissue (M00-M99)

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❌ Excludes1

inherited from M85

Rules from parent category M85: Other disorders of bone density and structure

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

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Code Information

CodeM85.9
BillableYes
ParentM85
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes14 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)