MS-DRG 855Surgical
Infectious and Parasitic Diseases with O.R. Procedures without CC/MCC
Major Diagnostic Category 18·Grouped by procedure·FY 2027
MS-DRG 855 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 18 (MDC 18) without a significant Complication or Comorbidity. For FY 2027 it carries a relative weight of 1.4510 with a geometric mean length of stay of 3.2 days and an arithmetic mean of 4.1 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:
- 1.4510 (payment multiplier vs. the average case (1.0))
- Geometric mean stay:
- 3.2 days (used for transfer payments)
- Average stay:
- 4.1 days (arithmetic mean)
- Post-acute transfer policy:
- Yes (early transfers can be paid less)
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.