M85.042Billable
Fibrous dysplasia (monostotic), left hand
- Chapter
- 13. Diseases of the musculoskeletal system and connective tissue
- Category
- M85
- Effective date
- October 1, 2026
Related codes in category M85
M85Other disorders of bone density and structureM85.0Fibrous dysplasia (monostotic)M85.00Fibrous dysplasia (monostotic), unspecified siteYesM85.01Fibrous dysplasia (monostotic), shoulderM85.011Fibrous dysplasia (monostotic), right shoulderYesM85.012Fibrous dysplasia (monostotic), left shoulderYesM85.019Fibrous dysplasia (monostotic), unspecified shoulderYesM85.02Fibrous dysplasia (monostotic), upper armM85.021Fibrous dysplasia (monostotic), right upper armYesM85.022Fibrous dysplasia (monostotic), left upper armYesM85.029Fibrous dysplasia (monostotic), unspecified upper armYesM85.03Fibrous dysplasia (monostotic), forearm
Frequently asked questions
What is ICD-10 code M85.042?
M85.042 is an ICD-10-CM diagnosis code for Fibrous dysplasia (monostotic), left hand.
Is M85.042 a billable code?
Yes. M85.042 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M85.042 in?
M85.042 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M85.042 become effective?
M85.042 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M85.042?
M85.042 belongs to category M85, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.