M85.522
✓ BillableAneurysmal bone cyst, left upper arm
Diseases of the musculoskeletal system and connective tissue (M00-M99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • osteogenesis imperfecta (Q78.0)
- • osteopetrosis (Q78.2)
- • osteopoikilosis (Q78.8)
- • polyostotic fibrous dysplasia (Q78.1)
Clinical Description
ICD-10-CM code M85.522 represents aneurysmal bone cyst, left upper arm. This code falls under the Diseases of the musculoskeletal system and connective tissue (M00-M99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 7-character code at the 6th level of specificity. This is the most specific code available in this subcategory. Coders should note that M85.522 has 4 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code M85.522?
ICD-10-CM code M85.522 is "Aneurysmal bone cyst, left upper arm". It belongs to the category: Diseases of the musculoskeletal system and connective tissue (M00-M99).
Is M85.522 a billable ICD-10 code?
Yes, M85.522 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with M85.522?
M85.522 has 4 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can M85.522 be coded with other codes?
M85.522 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in M85.52
Other codes in the same category that may be relevant for differential coding:
🧪 Validate Combinations
Add M85.522 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)