MS-DRG 404Surgical

Hip or Knee Procedures with Principal Diagnosis of Periprosthetic Joint Infection without MCC

Major Diagnostic Category 08·Grouped by procedure·FY 2027

MS-DRG 404 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 08 (MDC 08) without a significant Complication or Comorbidity. It maps to 4 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 3.2513 with a geometric mean length of stay of 4.6 days and an arithmetic mean of 5.7 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:
3.2513 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
4.6 days (used for transfer payments)
Average stay:
5.7 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
403Hip or Knee Procedures with Principal Diagnosis of Periprosthetic Joint Infection with MCC or Insertion of Antibiotic-eluting Bone Void Filler5.00619 days
404Hip or Knee Procedures with Principal Diagnosis of Periprosthetic Joint Infection without MCC (this page)3.25134.6 days

Procedure codes (305)

ICD-10-PCS procedures that can group a stay to DRG 404.