MS-DRG 456Surgical

Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC

Major Diagnostic Category 08·Grouped by procedure·FY 2027

MS-DRG 456 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 08 (MDC 08) with a Major Complication or Comorbidity (MCC). It maps to 163 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 7.6244 with a geometric mean length of stay of 9.9 days and an arithmetic mean of 12.3 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:
7.6244 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
9.9 days (used for transfer payments)
Average stay:
12.3 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.

DRGTitleRelative weightMean stay
456Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with MCC (this page)7.62449.9 days
457Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection with CC5.36684.5 days
458Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, or Infection without CC/MCC4.03882.1 days

Procedure codes (242)

ICD-10-PCS procedures that can group a stay to DRG 456.

Diagnosis codes (163)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 456. 100% of the codes listed are billable.