ICD-10-CM Diagnosis Code E31.21
Diagnosis Code: E31.21 (Raw: E3121)
Description: Multiple endocrine neoplasia [MEN] type I
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 E31.21 is designated for Multiple endocrine neoplasia [MEN] type I. 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.