ICD-10 Code M18.51 - Other unilateral secondary osteoarthritis of first carpometacarpal joint, right hand

ICD-10-CM Diagnosis Code M18.51

Diagnosis Code: M18.51 (Raw: M1851)

Description: Other unilateral secondary osteoarthritis of first carpometacarpal joint, right hand

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 M18.51 is designated for Other unilateral secondary osteoarthritis of first carpometacarpal joint, right hand. 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.