ICD-10 Code S33.100A - Subluxation of unspecified lumbar vertebra, initial encounter

ICD-10-CM Diagnosis Code S33.100A

Diagnosis Code: S33.100A (Raw: S33100A)

Description: Subluxation of unspecified lumbar vertebra, 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 S33.100A is designated for Subluxation of unspecified lumbar vertebra, 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.