All ICD10 Codes
MS-DRG 858Surgical

Postoperative or Post-Traumatic Infections with O.R. Procedures without CC/MCC

Major Diagnostic Category 18·Grouped by procedure·FY 2027

MS-DRG 858 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 18 (MDC 18) without a significant Complication or Comorbidity. It maps to 11 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 1.4036 with a geometric mean length of stay of 3.3 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:
1.4036 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
3.3 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.

DRGTitleRelative weightMean stay
856Postoperative or Post-Traumatic Infections with O.R. Procedures with MCC4.48268.8 days
857Postoperative or Post-Traumatic Infections with O.R. Procedures with CC2.16785.3 days
858Postoperative or Post-Traumatic Infections with O.R. Procedures without CC/MCC (this page)1.40363.3 days

Diagnosis codes (11)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 858. 100% of the codes listed are billable.