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ICD-10-CM · FY 2026 APRIL UPDATE

M85

Other disorders of bone density and structure

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
M85.0Fibrous dysplasia (monostotic)Category
M85.00Fibrous dysplasia (monostotic), unspecified siteBillable
M85.01Fibrous dysplasia (monostotic), shoulderCategory
M85.011Fibrous dysplasia (monostotic), right shoulderBillable
M85.012Fibrous dysplasia (monostotic), left shoulderBillable
M85.019Fibrous dysplasia (monostotic), unspecified shoulderBillable
M85.02Fibrous dysplasia (monostotic), upper armCategory
M85.021Fibrous dysplasia (monostotic), right upper armBillable
M85.022Fibrous dysplasia (monostotic), left upper armBillable
M85.029Fibrous dysplasia (monostotic), unspecified upper armBillable
M85.03Fibrous dysplasia (monostotic), forearmCategory
M85.031Fibrous dysplasia (monostotic), right forearmBillable
M85.032Fibrous dysplasia (monostotic), left forearmBillable
M85.039Fibrous dysplasia (monostotic), unspecified forearmBillable
M85.04Fibrous dysplasia (monostotic), handCategory
M85.041Fibrous dysplasia (monostotic), right handBillable
M85.042Fibrous dysplasia (monostotic), left handBillable
M85.049Fibrous dysplasia (monostotic), unspecified handBillable
M85.05Fibrous dysplasia (monostotic), thighCategory
M85.051Fibrous dysplasia (monostotic), right thighBillable
M85.052Fibrous dysplasia (monostotic), left thighBillable
M85.059Fibrous dysplasia (monostotic), unspecified thighBillable
M85.06Fibrous dysplasia (monostotic), lower legCategory
M85.061Fibrous dysplasia (monostotic), right lower legBillable
M85.062Fibrous dysplasia (monostotic), left lower legBillable
M85.069Fibrous dysplasia (monostotic), unspecified lower legBillable
M85.07Fibrous dysplasia (monostotic), ankle and footCategory
M85.071Fibrous dysplasia (monostotic), right ankle and footBillable
M85.072Fibrous dysplasia (monostotic), left ankle and footBillable
M85.079Fibrous dysplasia (monostotic), unspecified ankle and footBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.