MS-DRG 451Surgical

Single Level Spinal Fusion Except Cervical without MCC

Major Diagnostic Category 08·Grouped by procedure·FY 2027

MS-DRG 451 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 08 (MDC 08) without a significant Complication or Comorbidity. For FY 2027 it carries a relative weight of 3.2600 with a geometric mean length of stay of 2.4 days and an arithmetic mean of 3.1 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:
3.2600 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
2.4 days (used for transfer payments)
Average stay:
3.1 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.

DRGTitleRelative weightMean stay
450Single Level Spinal Fusion Except Cervical with MCC5.23406.3 days
451Single Level Spinal Fusion Except Cervical without MCC (this page)3.26002.4 days

Procedure codes (175)

ICD-10-PCS procedures that can group a stay to DRG 451.