Billable / Specific Code
ICD-10-CM M21.159 is the diagnosis code for Varus deformity, not elsewhere classified, 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 M21.159 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, M21.159 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
M21.159 is the ICD-10-CM diagnosis code for "Varus deformity, not elsewhere classified, unspecified hip". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of M21.159 is M21.15 ("Varus deformity, not elsewhere classified, hip"). M21.159 provides a more specific classification within this category.
M21.159 is located in Section M20-M25 — "Other joint disorders" within Chapter 13 of the ICD-10-CM Tabular List.
Use M21.159 when the patients documented diagnosis matches "Varus deformity, not elsewhere classified, 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 Varus deformity, not elsewhere classified, unspecified hip is M21.159.
Yes, M21.159 can be used as a primary diagnosis code since it is billable and specific.
M21.159 is in Chapter 13 of the ICD-10-CM Tabular List.
Yes, M21.159 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.