MS-DRG 321Surgical
Percutaneous Cardiovascular Procedures with Intraluminal Device with MCC or 4+ Arteries/Intraluminal Devices
Major Diagnostic Category 05·Grouped by procedure·FY 2027
MS-DRG 321 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 05 (MDC 05) with a Major Complication or Comorbidity (MCC). For FY 2027 it carries a relative weight of 2.7140 with a geometric mean length of stay of 3.6 days and an arithmetic mean of 4.8 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
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FY 2027 payment data
From Table 5 of the FY 2027 IPPS Final Rule (CMS).
- Relative weight:
- 2.7140 (payment multiplier vs. the average case (1.0))
- Geometric mean stay:
- 3.6 days (used for transfer payments)
- Average stay:
- 4.8 days (arithmetic mean)
- Post-acute transfer policy:
- No (not subject to it)
Same condition, other severity levels
CMS splits one condition into separate DRGs by how sick the patient is. With MCC pays more than with CC, which pays more than without CC/MCC.
| DRG | Title | Relative weight | Mean stay |
|---|---|---|---|
| 321 | Percutaneous Cardiovascular Procedures with Intraluminal Device with MCC or 4+ Arteries/Intraluminal Devices (this page) | 2.7140 | 3.6 days |
| 322 | Percutaneous Cardiovascular Procedures with Intraluminal Device without MCC | 1.7744 | 2 days |
Procedure codes (8)
ICD-10-PCS procedures that can group a stay to DRG 321.
- 02700ZZDilation of Coronary Artery, One Artery, Open Approach
- 02710ZZDilation of Coronary Artery, Two Arteries, Open Approach
- 02720ZZDilation of Coronary Artery, Three Arteries, Open Approach
- 02730ZZDilation of Coronary Artery, Four or More Arteries, Open Approach
- 02H00YZInsertion of Other Device into Coronary Artery, One Artery, Open Approach
- 02H10YZInsertion of Other Device into Coronary Artery, Two Arteries, Open Approach
- 02H20YZInsertion of Other Device into Coronary Artery, Three Arteries, Open Approach
- 02H30YZInsertion of Other Device into Coronary Artery, Four or More Arteries, Open Approach