| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| G40919 (Diagnosis) - Epilepsy, unsp, intractable, without status epilepticus (Epilepsy, unspecified, intractable, without status epilepticus) | Single To Single | 34591 (Diagnosis) - Epilepsy NOS w intr epil (Epilepsy, unspecified, with intractable epilepsy) |
| CMS/CDC General Equivalence Mappings |
| G40919 (Diagnosis) - Epilepsy, unsp, intractable, without status epilepticus (Epilepsy, unspecified, intractable, without status epilepticus) | Single To Single | Alternative #1: 34591 (Diagnosis) - Epilepsy NOS w intr epil (Epilepsy, unspecified, with intractable epilepsy) |