| Source ICD-10 | Mapping Type | Target ICD-9 |
| Recommended Mapping (based on statistical analysis) |
| G40813 (Diagnosis) - Lennox-Gastaut syndrome, intractable, w status epilepticus (Lennox-Gastaut syndrome, intractable, with status epilepticus) | Single To Single | 34581 (Diagnosis) - Epilepsy NEC w intr epil (Other forms of epilepsy and recurrent seizures, with intractable epilepsy) |
| CMS/CDC General Equivalence Mappings |
| G40813 (Diagnosis) - Lennox-Gastaut syndrome, intractable, w status epilepticus (Lennox-Gastaut syndrome, intractable, with status epilepticus) | Single To Single | Alternative #1: 34581 (Diagnosis) - Epilepsy NEC w intr epil (Other forms of epilepsy and recurrent seizures, with intractable epilepsy) |