.svg)
ICD-10-CM Diagnosis Code D89.9
Diagnosis Code: D89.9 (Raw: D899)
Description: Disorder involving the immune mechanism, unspecified
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 D89.9 is designated for Disorder involving the immune mechanism, unspecified. 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.