ICD-9-CM Diagnosis Code 379.43
Diagnosis Code: 379.43 (Raw: 37943)
Description: Mydriasis (persistent), not due to mydriatics
Classification: International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM)
Fiscal Year: 2026 Reference
CMS Section 111 Status: Valid for reporting.
Overview & Historical Usage
ICD-9-CM code 379.43 is designated for Mydriasis (persistent), not due to mydriatics. While superseded by ICD-10 for current healthcare encounters, it remains a recognized reference code for CMS Section 111 reporting, legacy claims adjudication, and historical clinical data analysis.