M85.661Billable
Other cyst of bone, right lower leg
- 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 M85.661?
M85.661 is an ICD-10-CM diagnosis code for Other cyst of bone, right lower leg.
Is M85.661 a billable code?
Yes. M85.661 is billable and specific enough to be used on a claim.
What ICD-10-CM chapter is M85.661 in?
M85.661 falls under Chapter 13: Diseases of the musculoskeletal system and connective tissue.
When did M85.661 become effective?
M85.661 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to M85.661?
M85.661 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.