All ICD10 Codes
MS-DRG 400Surgical

Knee Procedures with Principal Diagnosis of Infection

Major Diagnostic Category 08·Grouped by procedure·FY 2027

MS-DRG 400 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 08 (MDC 08). It maps to 56 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 2.0248 with a geometric mean length of stay of 5.8 days and an arithmetic mean of 6.9 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

FY 2027 payment data

From Table 5 of the FY 2027 IPPS Final Rule (CMS).

Relative weight:
2.0248 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
5.8 days (used for transfer payments)
Average stay:
6.9 days (arithmetic mean)
Post-acute transfer policy:
Yes (early transfers can be paid less)

Procedure codes (270)

ICD-10-PCS procedures that can group a stay to DRG 400.

Diagnosis codes (56)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 400. 100% of the codes listed are billable.