Billable / Specific Code
ICD-10-CM M85.039 is the diagnosis code for Fibrous dysplasia (monostotic), 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 M85.039 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M85.039 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M85.039 is the ICD-10-CM diagnosis code for "Fibrous dysplasia (monostotic), unspecified forearm". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M85.039 is M85.03 ("Fibrous dysplasia (monostotic), forearm"). M85.039 provides a more specific classification within this category.
M85.039 is located in Section M80-M85 — "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.
Use M85.039 when the patients documented diagnosis matches "Fibrous dysplasia (monostotic), 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 Fibrous dysplasia (monostotic), unspecified forearm is M85.039.
Yes, M85.039 can be used as a primary diagnosis code since it is billable and specific.
M85.039 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M85.039 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.