ICD-10-CM Diagnosis Code S13.121A
Diagnosis Code: S13.121A (Raw: S13121A)
Description: Dislocation of C1/C2 cervical vertebrae, initial encounter
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 S13.121A is designated for Dislocation of C1/C2 cervical vertebrae, initial encounter. 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.