ICD-10-CM Diagnosis Code M99.00
Diagnosis Code: M99.00 (Raw: M9900)
Description: Segmental and somatic dysfunction of head region
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 M99.00 is designated for Segmental and somatic dysfunction of head region. 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.