ICD-10-CM M85.5 is the diagnosis code for Aneurysmal bone cyst. This code falls under the section "Disorders of bone density and structure" within Chapter 13 â Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in M85.5. If the patient has both, code each condition separately:
Understanding where M85.5 sits in the ICD-10-CM classification helps ensure proper coding:
No, M85.5 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
M85.5 is the ICD-10-CM diagnosis code for "Aneurysmal bone cyst". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M85.5 is M85 ("Other disorders of bone density and structure"). M85.5 provides a more specific classification within this category.
M85.5 is located in Section M80-M85 â "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.
M85.5 has 10 sub-code(s) that provide more specific detail: M85.50, M85.51, M85.52, M85.53, M85.54 and more.
Use M85.5 when the patients documented diagnosis matches "Aneurysmal bone cyst" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Aneurysmal bone cyst is M85.5.
No, M85.5 is non-billable. Use a more specific sub-code for primary diagnosis billing.
M85.5 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M85.5 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.