M85.09
✓ Billable
Fibrous dysplasia (monostotic), multiple sites
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M85.09
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M85.09?
ICD-10-CM code M85.09 represents Fibrous dysplasia (monostotic), multiple sites. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M85.09 billable?
Yes. M85.09 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M85.09 in?
M85.09 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
Related codes in the M85 category
M85
Other disorders of bone density and structure
Non-billable
M85.0
Fibrous dysplasia (monostotic)
Non-billable
M85.1
Skeletal fluorosis
Non-billable
M85.2
Hyperostosis of skull
Billable
M85.3
Osteitis condensans
Non-billable
M85.4
Solitary bone cyst
Non-billable
M85.5
Aneurysmal bone cyst
Non-billable
M85.6
Other cyst of bone
Non-billable
Search all 98,186 ICD-10-CM codes instantly
Search ICDwise →