ICD-10 Code M21.161 - Varus deformity, not elsewhere classified, right knee

ICD-10-CM Diagnosis Code M21.161

Diagnosis Code: M21.161 (Raw: M21161)

Description: Varus deformity, not elsewhere classified, right knee

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code M21.161 is designated for Varus deformity, not elsewhere classified, right knee. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.