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ICD-10 Code G40.843 - KCNQ2-related epilepsy, intractable, with status epilepticus

Reviewed by Medicinsk Expert•Last updated: 2026-10-22•ICD Codes

ICD-10-CM Diagnosis Code G40.843

Diagnosis Code: G40.843 (Raw: G40843)

Description: KCNQ2-related epilepsy, intractable, with status epilepticus

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting (Excluded from No-Fault liability reporting).

Overview & Clinical Details

ICD-10-CM code G40.843 is designated for KCNQ2-related epilepsy, intractable, with status epilepticus. 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.

Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.