M85.5
Header — not billableAneurysmal bone cyst
The ICD-10 code for aneurysmal bone cyst is M85.5.
M85.5 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 10 more specific codes below.
Clinical notes
Excludes2 (not included here)
An Excludes2 note means the excluded condition is not part of this one, but a patient can have both at the same time — in that case both codes may be reported together.
- aneurysmal cyst of jaw (M27.4)
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under M85.5
- M85.50Aneurysmal bone cyst, unspecified site
- M85.51Aneurysmal bone cyst, shouldernon-billable header
- M85.52Aneurysmal bone cyst, upper armnon-billable header
- M85.53Aneurysmal bone cyst, forearmnon-billable header
- M85.54Aneurysmal bone cyst, handnon-billable header
- M85.55Aneurysmal bone cyst, thighnon-billable header
- M85.56Aneurysmal bone cyst, lower legnon-billable header
- M85.57Aneurysmal bone cyst, ankle and footnon-billable header
- M85.58Aneurysmal bone cyst, other site
- M85.59Aneurysmal bone cyst, multiple sites
Related codes in this category
- M85.0Fibrous dysplasia (monostotic)non-billable header
- M85.1Skeletal fluorosisnon-billable header
- M85.2Hyperostosis of skull
- M85.3Osteitis condensansnon-billable header
- M85.4Solitary bone cystnon-billable header
- M85.6Other cyst of bonenon-billable header
- M85.8Other specified disorders of bone density and structurenon-billable header
- M85.9Disorder of bone density and structure, unspecified
- M85.5Aneurysmal bone cystnon-billable header