ICD-10 Code T65.824A - Toxic effect of harmful algae and algae toxins, undetermined, initial encounter

ICD-10-CM Diagnosis Code T65.824A

Diagnosis Code: T65.824A (Raw: T65824A)

Description: Toxic effect of harmful algae and algae toxins, undetermined, 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 T65.824A is designated for Toxic effect of harmful algae and algae toxins, undetermined, 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.