MS-DRG 100: SEIZURES WITH MCC
MS-DRG 100 is seizures with mcc, in MDC 01 (a medical DRG), at the with-MCC (major complication or comorbidity) level. Its FY2027 relative weight is 1.9233, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 4.30 days. 62 ICD-10-CM principal diagnoses group into MS-DRGs 100–101 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.9233
- Geometric mean LOS
- 4.30
- Arithmetic mean LOS
- 6.20
- Post-acute transfer
- Yes
This DRG is subject to the post-acute care transfer policy: a discharge to a qualifying setting below the mean length of stay is paid per diem rather than in full.
Principal diagnoses that group to MS-DRGs 100–101
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 62 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 100–101 the case lands in. The 24 most-searched:
- R56.9Unspecified convulsions
- G40.909Epilepsy, unspecified, not intractable, without status epilepticus
- G40.89Other seizures
- G40.109Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, without status epilepticus
- G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticus
- G40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticus
- G40.919Epilepsy, unspecified, intractable, without status epilepticus
- G40.309Generalized idiopathic epilepsy and epileptic syndromes, not intractable, without status epilepticus
- G40.901Epilepsy, unspecified, not intractable, with status epilepticus
- G40.009Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, without status epilepticus
- G40.409Other generalized epilepsy and epileptic syndromes, not intractable, without status epilepticus
- R56.1Post traumatic seizures
- G40.A09Absence epileptic syndrome, not intractable, without status epilepticus
- G40.419Other generalized epilepsy and epileptic syndromes, intractable, without status epilepticus
- G40.509Epileptic seizures related to external causes, not intractable, without status epilepticus
- G40.822Epileptic spasms, not intractable, without status epilepticus
- R56.00Simple febrile convulsions
- R56.01Complex febrile convulsions
- G40.001Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, not intractable, with status epilepticus
- G40.011Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, with status epilepticus
- G40.019Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset, intractable, without status epilepticus
- G40.101Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, not intractable, with status epilepticus
- G40.111Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, with status epilepticus
- G40.119Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, without status epilepticus
38 more codes group here. Open any code above for its full hierarchy, or check a whole claim in the free DRG calculator.
The severity splits
Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 100.
| 100 | SEIZURES WITH MCC | 1.9233 | |
| 101 | SEIZURES WITHOUT MCC | 0.8952 | -1.0281 |
All FY2027 MS-DRGs · MDC 01