Billable / Specific Code
ICD-10-CM M85.539 is the diagnosis code for Aneurysmal bone cyst, unspecified forearm. This code falls under the section "Disorders of bone density and structure" within Chapter 13 — Diseases of the musculoskeletal system and connective tissue (M00-M99). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where M85.539 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M85.539 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M85.539 is the ICD-10-CM diagnosis code for "Aneurysmal bone cyst, unspecified forearm". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M85.539 is M85.53 ("Aneurysmal bone cyst, forearm"). M85.539 provides a more specific classification within this category.
M85.539 is located in Section M80-M85 — "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.
Use M85.539 when the patients documented diagnosis matches "Aneurysmal bone cyst, unspecified forearm" 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, unspecified forearm is M85.539.
Yes, M85.539 can be used as a primary diagnosis code since it is billable and specific.
M85.539 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M85.539 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.