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M85.422

M85.422: Solitary bone cyst, left humerus

Billable / specific codeICD-10-CMleft

M85.422 is a billable, specific ICD-10-CM code for solitary bone cyst, left humerus. It is valid for submission on a claim.

Check M85.422 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above M85.422

A category’s note binds every code beneath it.

Written on M85: Other disorders of bone density and structure

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

Excludes2 inherited from the categories above M85.422

Not part of this code, but both may be coded when both are present.

Written on M85.4: Solitary bone cyst

  • solitary cyst of jaw (M27.4)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

M85.422 is named in 7 Medicare coverage policies: 0 listing it as supporting medical necessity, and 7 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A58865Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58883Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A58893Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered
  • A59374Billing and Coding: Amniotic and Placental-Derived Product Injections and/or Applications for Musculoskeletal Indications, Non-Woundnot covered

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under M85.42

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.