MS-DRGs in MDC 01
Weights in this category range from 0.6770 (DRG 066) to 7.9590 (DRG 020); the change column compares FY2027 with FY2026.
| DRG | Title | Type | Weight | GMLOS | Change |
|---|---|---|---|---|---|
| 020 | Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage with MCC | Surgical | 7.9590 | 8.4 | +1.1% |
| 021 | Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage with CC | Surgical | 5.4700 | 4.8 | +3.3% |
| 022 | Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage without CC/MCC | Surgical | 3.3520 | 1.6 | +5.5% |
| 023 | Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis with MCC or Antineoplastic Implant or Epilepsy with Neurostimulator | Surgical | 5.7420 | 7.2 | +0.2% |
| 024 | Craniotomy with Major Device Implant or Acute Complex CNS Principal Diagnosis without MCC | Surgical | 3.9690 | 3.6 | +1.5% |
| 025 | Craniotomy and Endovascular Intracranial Procedures with MCC | Surgical | 4.6110 | 6.2 | +1.4% |
| 026 | Craniotomy and Endovascular Intracranial Procedures with CC | Surgical | 3.1910 | 2.7 | +2.6% |
| 027 | Craniotomy and Endovascular Intracranial Procedures without CC/MCC | Surgical | 2.6330 | 1.5 | +4.4% |
| 028 | Spinal Procedures with MCC | Surgical | 6.1500 | 9.7 | +2.4% |
| 029 | Spinal Procedures with CC or Spinal Neurostimulators | Surgical | 3.5170 | 4.7 | +3.1% |
| 030 | Spinal Procedures without CC/MCC | Surgical | 2.2560 | 2.5 | +2.8% |
| 031 | Ventricular Shunt Procedures with MCC | Surgical | 4.2600 | 6.5 | -4.9% |
| 032 | Ventricular Shunt Procedures with CC | Surgical | 2.0420 | 2.4 | -4.2% |
| 033 | Ventricular Shunt Procedures without CC/MCC | Surgical | 1.7290 | 1.5 | +4.0% |
| 034 | Carotid Artery Stent Procedures with MCC | Surgical | 3.8920 | 4.5 | +0.5% |
| 035 | Carotid Artery Stent Procedures with CC | Surgical | 2.4050 | 1.9 | +0.6% |
| 036 | Carotid Artery Stent Procedures without CC/MCC | Surgical | 1.9200 | 1.2 | -1.2% |
| 037 | Extracranial Procedures with MCC | Surgical | 3.4230 | 4.9 | +4.0% |
| 038 | Extracranial Procedures with CC | Surgical | 1.6310 | 1.8 | +0.5% |
| 039 | Extracranial Procedures without CC/MCC | Surgical | 1.1860 | 1.2 | +0.9% |
| 040 | Peripheral, Cranial Nerve and Other Nervous System Procedures with MCC | Surgical | 3.7170 | 6.9 | -3.7% |
| 041 | Peripheral, Cranial Nerve and Other Nervous System Procedures with CC or Peripheral Neurostimulator | Surgical | 2.1790 | 3.7 | -0.9% |
| 042 | Peripheral, Cranial Nerve and Other Nervous System Procedures without CC/MCC | Surgical | 1.6760 | 2.3 | -3.0% |
| 052 | Spinal Disorders and Injuries with CC/MCC | Medical | 1.7840 | 4.2 | -1.5% |
| 053 | Spinal Disorders and Injuries without CC/MCC | Medical | 0.9720 | 2.4 | -0.7% |
| 054 | Nervous System Neoplasms with MCC | Medical | 1.5200 | 3.9 | -0.5% |
| 055 | Nervous System Neoplasms without MCC | Medical | 1.0290 | 2.9 | +0.9% |
| 056 | Degenerative Nervous System Disorders with MCC | Medical | 2.2650 | 5.4 | -2.5% |
| 057 | Degenerative Nervous System Disorders without MCC | Medical | 1.2840 | 3.6 | -0.9% |
| 058 | Multiple Sclerosis and Cerebellar Ataxia with MCC | Medical | 1.8430 | 5.0 | +7.8% |
| 059 | Multiple Sclerosis and Cerebellar Ataxia with CC | Medical | 1.2000 | 3.6 | -3.3% |
| 060 | Multiple Sclerosis and Cerebellar Ataxia without CC/MCC | Medical | 0.9250 | 2.9 | +0.5% |
| 061 | Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with MCC | Medical | 2.7210 | 4.7 | -1.3% |
| 062 | Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent with CC | Medical | 1.7780 | 3.0 | +1.2% |
| 063 | Ischemic Stroke, Precerebral Occlusion or Transient Ischemia with Thrombolytic Agent without CC/MCC | Medical | 1.4550 | 2.2 | +3.6% |
| 064 | Intracranial Hemorrhage or Cerebral Infarction with MCC | Medical | 1.9720 | 4.4 | -1.9% |
| 065 | Intracranial Hemorrhage or Cerebral Infarction with CC or tPA in 24 Hours | Medical | 0.9910 | 2.8 | -1.9% |
| 066 | Intracranial Hemorrhage or Cerebral Infarction without CC/MCC | Medical | 0.6770 | 1.9 | -1.0% |
| 067 | Precerebral Occlusion without Infarction with MCC | Medical | 1.4280 | 3.4 | -2.8% |
| 068 | Precerebral Occlusion without Infarction without MCC | Medical | 0.9010 | 2.1 | +4.3% |
| 069 | Transient Ischemia without Thrombolytic | Medical | 0.7960 | 2.0 | -0.4% |
| 070 | Other Cerebrovascular Disorders with MCC | Medical | 1.6090 | 4.4 | -3.4% |
| 071 | Other Cerebrovascular Disorders with CC | Medical | 1.0170 | 3.2 | -0.9% |
| 072 | Other Cerebrovascular Disorders without CC/MCC | Medical | 0.7340 | 2.2 | -2.9% |
| 073 | Cranial and Peripheral Nerve Disorders with MCC | Medical | 1.5770 | 4.1 | -1.7% |
| 074 | Cranial and Peripheral Nerve Disorders without MCC | Medical | 1.0170 | 2.9 | -1.4% |
| 075 | Viral Meningitis with CC/MCC | Medical | 1.7700 | 5.5 | -7.7% |
| 076 | Viral Meningitis without CC/MCC | Medical | 0.8670 | 2.8 | +5.1% |
| 080 | Nontraumatic Stupor and Coma with MCC | Medical | 1.7480 | 4.6 | -3.4% |
| 081 | Nontraumatic Stupor and Coma without MCC | Medical | 0.8060 | 2.8 | -10.0% |
| 082 | Traumatic Stupor and Coma >1 Hour with MCC | Medical | 2.2930 | 4.4 | +0.3% |
| 083 | Traumatic Stupor and Coma >1 Hour with CC | Medical | 1.3830 | 3.2 | -0.9% |
| 084 | Traumatic Stupor and Coma >1 Hour without CC/MCC | Medical | 0.9600 | 2.1 | +0.4% |
| 085 | Traumatic Stupor and Coma <1 Hour with MCC | Medical | 2.2440 | 4.4 | -1.2% |
| 086 | Traumatic Stupor and Coma <1 Hour with CC | Medical | 1.3060 | 2.9 | +0.2% |
| 087 | Traumatic Stupor and Coma <1 Hour without CC/MCC | Medical | 0.9220 | 2.0 | +0.8% |
| 088 | Concussion with MCC | Medical | 1.4270 | 3.3 | +5.6% |
| 089 | Concussion with CC | Medical | 1.1320 | 2.6 | +3.0% |
| 090 | Concussion without CC/MCC | Medical | 0.8280 | 1.8 | +0.6% |
| 091 | Other Disorders of Nervous System with MCC | Medical | 1.7050 | 4.3 | -2.9% |
| 092 | Other Disorders of Nervous System with CC | Medical | 1.0240 | 3.0 | +0.1% |
| 093 | Other Disorders of Nervous System without CC/MCC | Medical | 0.7780 | 2.2 | -2.3% |
| 094 | Bacterial and Tuberculous Infections of Nervous System with MCC | Medical | 3.4110 | 7.7 | -3.1% |
| 095 | Bacterial and Tuberculous Infections of Nervous System with CC | Medical | 2.3500 | 5.5 | -8.9% |
| 096 | Bacterial and Tuberculous Infections of Nervous System without CC/MCC | Medical | 2.3210 | 4.5 | -10.0% |
| 097 | Non-Bacterial Infection of Nervous System Except Viral Meningitis with MCC | Medical | 3.8210 | 9.0 | +5.8% |
| 098 | Non-Bacterial Infection of Nervous System Except Viral Meningitis with CC | Medical | 2.2710 | 5.8 | -1.1% |
| 099 | Non-Bacterial Infection of Nervous System Except Viral Meningitis without CC/MCC | Medical | 1.5250 | 3.9 | +12.0% |
| 100 | Seizures with MCC | Medical | 1.9240 | 4.3 | -0.7% |
| 101 | Seizures without MCC | Medical | 0.8950 | 2.6 | -0.9% |
| 102 | Headaches with MCC | Medical | 1.1200 | 2.9 | -0.1% |
| 103 | Headaches without MCC | Medical | 0.8220 | 2.2 | -1.7% |
How to read this table
The relative weight is the payment multiplier CMS applies to a hospital's wage-adjusted standardized amount; a weight of 2.0 pays roughly twice an average inpatient case before outliers and add-ons. Geometric mean length of stay is the figure used in post-acute transfer calculations, so stays shorter than it in a transfer DRG are paid per diem. The change column compares the FY2027 final weight with FY2026; moves larger than two percent usually come from code reassignments in the final rule's Table 6 series or from updated cost data, and are worth re-checking in contract models and budgets before October 1. Surgical DRGs require a qualifying operating-room procedure; medical DRGs are reached when no such procedure is coded.
Frequently asked questions
How many MS-DRGs are in MDC 01?
72 MS-DRGs are assigned to MDC 01 (Assignment of Diagnosis Codes) in the FY2027 v44 grouper: 23 surgical and 49 medical.
Which MDC 01 DRG has the highest weight?
DRG 020, Intracranial Vascular Procedures with Principal Diagnosis Hemorrhage with MCC, carries the highest FY2027 relative weight in this category at 7.9590; the lowest is DRG 066 at 0.6770.
How is a stay assigned to this MDC?
The grouper maps the principal diagnosis to MDC 01, then checks for a qualifying operating-room procedure to choose between the surgical and medical DRG partitions, and finally applies CC/MCC severity splits.
Sources
Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-01. Verify against the primary file before billing or contracting decisions.
- IPPS FY2027 Final Rule Table 5 (CMS-1849-F)Version v44 FY2027 · effective 2026-10-01 · file CMS-1849-F Table 5.txtSHA-256 01003dd571c1e2f5…
- IPPS FY2026 Final Rule Table 5 (CMS-1833-F)Version v43 FY2026 · effective 2025-10-01 · file CMS-1833-F Table 5.txtSHA-256 bf8c390d14b3cd3e…
Disclaimer
Operational reference compiled from CMS publications. Relative weights are national factors; actual payment depends on hospital-specific rates and adjustments. Not legal, clinical or billing advice.