Billable / Specific Code
ICD-10-CM M21.259 is the diagnosis code for Flexion deformity, unspecified hip. This code falls under the section "Other joint disorders" 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 M21.259 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M21.259 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M21.259 is the ICD-10-CM diagnosis code for "Flexion deformity, unspecified hip". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M21.259 is M21.25 ("Flexion deformity, hip"). M21.259 provides a more specific classification within this category.
M21.259 is located in Section M20-M25 — "Other joint disorders" within Chapter 13 of the ICD-10-CM Tabular List.
Use M21.259 when the patients documented diagnosis matches "Flexion deformity, unspecified hip" 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 Flexion deformity, unspecified hip is M21.259.
Yes, M21.259 can be used as a primary diagnosis code since it is billable and specific.
M21.259 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M21.259 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.