DRG 101
Medical DRGSeizures without MCC
What is MS-DRG 101?
MS-DRG 101 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 01 (MDC 01) without a significant Complication or Comorbidity. It maps to 62 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 0.9026 with a geometric mean length of stay of 2.6 days and an arithmetic mean of 3.4 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
| DRG | Title | Rel. Weight | GMLOS |
|---|---|---|---|
| 100 | Seizures with MCC | 1.9368 | 4.3 days |
| 101 | Seizures without MCCThis page | 0.9026 | 2.6 days |
Linked ICD-10-CM Diagnosis Mappings
- G40.001
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus
BillableChapter 6 - G40.009
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus
BillableChapter 6 - G40.011
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus
BillableChapter 6 - G40.019
Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus
BillableChapter 6 - G40.101
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus
BillableChapter 6 - G40.109
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus
BillableChapter 6 - G40.111
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus
BillableChapter 6 - G40.119
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus
BillableChapter 6 - G40.201
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticus
BillableChapter 6 - G40.209
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
BillableChapter 6 - G40.211
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticus
BillableChapter 6 - G40.219
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus
BillableChapter 6 - G40.301
Generalized idiopathic epilepsy and epileptic syndromes, not intractable, with status epilepticus
BillableChapter 6 - G40.309
Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus
BillableChapter 6 - G40.311
Generalized idiopathic epilepsy and epileptic syndromes, intractable, with status epilepticus
BillableChapter 6 - G40.319
Generalized idiopathic epilepsy and epileptic syndromes, intractable, without status epilepticus
BillableChapter 6 - G40.401
Other generalized epilepsy and epileptic syndromes, not intractable, with status epilepticus
BillableChapter 6 - G40.409
Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
BillableChapter 6 - G40.411
Other generalized epilepsy and epileptic syndromes, intractable, with status epilepticus
BillableChapter 6 - G40.419
Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus
BillableChapter 6 - G40.42
Cyclin-Dependent Kinase-Like 5 Deficiency Disorder
BillableChapter 6 - G40.501
Epileptic seizures related to external causes, not intractable, with status epilepticus
BillableChapter 6 - G40.509
Epileptic seizures related to external causes, not intractable, without status epilepticus
BillableChapter 6 - G40.801
Other epilepsy, not intractable, with status epilepticus
BillableChapter 6 - G40.802
Other epilepsy, not intractable, without status epilepticus
BillableChapter 6 - G40.803
Other epilepsy, intractable, with status epilepticus
BillableChapter 6 - G40.804
Other epilepsy, intractable, without status epilepticus
BillableChapter 6 - G40.811
Lennox-Gastaut syndrome, not intractable, with status epilepticus
BillableChapter 6 - G40.812
Lennox-Gastaut syndrome, not intractable, without status epilepticus
BillableChapter 6 - G40.813
Lennox-Gastaut syndrome, intractable, with status epilepticus
BillableChapter 6 - G40.814
Lennox-Gastaut syndrome, intractable, without status epilepticus
BillableChapter 6 - G40.821
Epileptic spasms, not intractable, with status epilepticus
BillableChapter 6 - G40.822
Epileptic spasms, not intractable, without status epilepticus
BillableChapter 6 - G40.823
Epileptic spasms, intractable, with status epilepticus
BillableChapter 6 - G40.824
Epileptic spasms, intractable, without status epilepticus
BillableChapter 6 - G40.833
Dravet syndrome, intractable, with status epilepticus
BillableChapter 6 - G40.834
Dravet syndrome, intractable, without status epilepticus
BillableChapter 6 - G40.841
KCNQ2-related epilepsy, not intractable, with status epilepticus
BillableChapter 6 - G40.842
KCNQ2-related epilepsy, not intractable, without status epilepticus
BillableChapter 6 - G40.843
KCNQ2-related epilepsy, intractable, with status epilepticus
BillableChapter 6 - G40.844
KCNQ2-related epilepsy, intractable, without status epilepticus
BillableChapter 6 - G40.89
Other seizures
BillableChapter 6 - G40.901
Epilepsy, unspecified, not intractable, with status epilepticus
BillableChapter 6 - G40.909
Epilepsy, unspecified, not intractable, without status epilepticus
BillableChapter 6 - G40.911
Epilepsy, unspecified, intractable, with status epilepticus
BillableChapter 6 - G40.919
Epilepsy, unspecified, intractable, without status epilepticus
BillableChapter 6 - G40.A01
Absence epileptic syndrome, not intractable, with status epilepticus
BillableChapter 6 - G40.A09
Absence epileptic syndrome, not intractable, without status epilepticus
BillableChapter 6 - G40.A11
Absence epileptic syndrome, intractable, with status epilepticus
BillableChapter 6 - G40.A19
Absence epileptic syndrome, intractable, without status epilepticus
BillableChapter 6 - G40.B01
Juvenile myoclonic epilepsy, not intractable, with status epilepticus
BillableChapter 6 - G40.B09
Juvenile myoclonic epilepsy, not intractable, without status epilepticus
BillableChapter 6 - G40.B11
Juvenile myoclonic epilepsy, intractable, with status epilepticus
BillableChapter 6 - G40.B19
Juvenile myoclonic epilepsy, intractable, without status epilepticus
BillableChapter 6 - G40.C01
Lafora progressive myoclonus epilepsy, not intractable, with status epilepticus
BillableChapter 6 - G40.C09
Lafora progressive myoclonus epilepsy, not intractable, without status epilepticus
BillableChapter 6 - G40.C11
Lafora progressive myoclonus epilepsy, intractable, with status epilepticus
BillableChapter 6 - G40.C19
Lafora progressive myoclonus epilepsy, intractable, without status epilepticus
BillableChapter 6 - R56.00
Simple febrile convulsions
BillableChapter 18 - R56.01
Complex febrile convulsions
BillableChapter 18 - R56.1
Post traumatic seizures
BillableChapter 18 - R56.9
Unspecified convulsions
BillableChapter 18