ICD-10-CM Diagnosis Code T40.3X5A
Diagnosis Code: T40.3X5A (Raw: T403X5A)
Description: Adverse effect of methadone, 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 T40.3X5A is designated for Adverse effect of methadone, 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.