Billable / Specific Code
ICD-10-CM M85.059 is the diagnosis code for Fibrous dysplasia (monostotic), unspecified thigh. 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 M85.059 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M85.059 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M85.059 is the ICD-10-CM diagnosis code for "Fibrous dysplasia (monostotic), unspecified thigh". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M85.059 is M85.05 ("Fibrous dysplasia (monostotic), thigh"). M85.059 provides a more specific classification within this category.
M85.059 is located in Section M80-M85 — "Disorders of bone density and structure" within Chapter 13 of the ICD-10-CM Tabular List.
Use M85.059 when the patients documented diagnosis matches "Fibrous dysplasia (monostotic), unspecified thigh" 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 thigh is M85.059.
Yes, M85.059 can be used as a primary diagnosis code since it is billable and specific.
M85.059 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M85.059 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.