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  3. Diagnosis Codes in MS-DRG 100 - Seizures With MCC

Diagnosis Codes in MS-DRG 100 - Seizures With MCC

The Medicare Severity Diagnosis-Related Group (MS-DRG) is a patient classification system used to categorize hospital cases based on clinical similarity and expected resource use. MS-DRGs organize all possible principal diagnoses into mutually exclusive groups known as Major Diagnostic Categories (MDCs), which help determine reimbursement under the Medicare Inpatient Prospective Payment System.

This section lists the diagnosis codes included in MS-DRG V42.0: Seizures with MCC from October 1, 2024, through September 30, 2025.

MS-DRG: 100

MS-DRG Title: Seizures with MCC

MCD: 01

Relative Weight: 1.9852 Relative Weight
The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Geometric LOS: 1.99 Geometric Length of Stay
The geometric mean length of stay (GMLOS) is used by Medicare to calculate the reimbursement for patients whose medical treatment takes a much longer or shorter time than average.

Arithmetic LOS: 4.40 Arithmetic Length of Stay
The average length of stay (ALOS) reflects the average number of days a patient spends in a hospital for each admission.

  • G40.30 - Generalized idiopathic epilepsy and epileptic syndromes, not intractable

    • G40.301 - Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus

    • G40.309 - Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus

  • G40.31 - Generalized idiopathic epilepsy and epileptic syndromes, intractable

    • G40.311 - Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus

    • G40.319 - Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus

  • G40.4 - Other generalized epilepsy and epileptic syndromes

    • G40.42 - Cyclin-Dependent Kinase-Like 5 Deficiency Disorder

  • G40.40 - Other generalized epilepsy and epileptic syndromes, not intractable

    • G40.401 - Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus

    • G40.409 - Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus

  • G40.41 - Other generalized epilepsy and epileptic syndromes, intractable

    • G40.411 - Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus

    • G40.419 - Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus

  • G40.8 - Other epilepsy and recurrent seizures

  • G40.80 - Other epilepsy

    • G40.801 - Other epilepsy, not intractable, with status epilepticus

    • G40.802 - Other epilepsy, not intractable, without status epilepticus

    • G40.803 - Other epilepsy, intractable, with status epilepticus

    • G40.804 - Other epilepsy, intractable, without status epilepticus

  • G40.81 - Lennox-Gastaut syndrome

    • G40.811 - Lennox-Gastaut syndrome, not intractable, with status epilepticus

    • G40.812 - Lennox-Gastaut syndrome, not intractable, without status epilepticus

    • G40.813 - Lennox-Gastaut syndrome, intractable, with status epilepticus

    • G40.814 - Lennox-Gastaut syndrome, intractable, without status epilepticus

  • G40.82 - Epileptic spasms

    • G40.821 - Epileptic spasms, not intractable, with status epilepticus

    • G40.822 - Epileptic spasms, not intractable, without status epilepticus

    • G40.823 - Epileptic spasms, intractable, with status epilepticus

    • G40.824 - Epileptic spasms, intractable, without status epilepticus

  • G40.83 - Dravet syndrome

    • G40.833 - Dravet syndrome, intractable, with status epilepticus

    • G40.834 - Dravet syndrome, intractable, without status epilepticus

  • G40.90 - Epilepsy, unspecified, not intractable

    • G40.901 - Epilepsy, unspecified, not intractable, with status epilepticus

    • G40.909 - Epilepsy, unspecified, not intractable, without status epilepticus

  • G40.91 - Epilepsy, unspecified, intractable

    • G40.911 - Epilepsy, unspecified, intractable, with status epilepticus

    • G40.919 - Epilepsy, unspecified, intractable, without status epilepticus

  • G40.A0 - Absence epileptic syndrome, not intractable

    • G40.A01 - Absence epileptic syndrome, not intractable, with status epilepticus

    • G40.A09 - Absence epileptic syndrome, not intractable, without status epilepticus

  • G40.A1 - Absence epileptic syndrome, intractable

    • G40.A11 - Absence epileptic syndrome, intractable, with status epilepticus

    • G40.A19 - Absence epileptic syndrome, intractable, without status epilepticus

  • G40.B0 - Juvenile myoclonic epilepsy, not intractable

    • G40.B01 - Juvenile myoclonic epilepsy, not intractable, with status epilepticus

    • G40.B09 - Juvenile myoclonic epilepsy, not intractable, without status epilepticus

  • G40.B1 - Juvenile myoclonic epilepsy, intractable

    • G40.B11 - Juvenile myoclonic epilepsy, intractable, with status epilepticus

    • G40.B19 - Juvenile myoclonic epilepsy, intractable, without status epilepticus

  • G40.C0 - Lafora progressive myoclonus epilepsy, not intractable

    • G40.C01 - Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus

    • G40.C09 - Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus

  • G40.C1 - Lafora progressive myoclonus epilepsy, intractable

    • G40.C11 - Lafora progressive myoclonus epilepsy, intractable, with status epilepticus

    • G40.C19 - Lafora progressive myoclonus epilepsy, intractable, without status epilepticus

  • R56 - Convulsions, not elsewhere classified

    • R56.1 - Post traumatic seizures

    • R56.9 - Unspecified convulsions

  • R56.0 - Febrile convulsions

    • R56.00 - Simple febrile convulsions

    • R56.01 - Complex febrile convulsions