All ICD10 Codes
MS-DRG 420Surgical

Hepatobiliary Diagnostic Procedures with MCC

Major Diagnostic Category 07·Grouped by procedure·FY 2027

MS-DRG 420 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 07 (MDC 07) with a Major Complication or Comorbidity (MCC). For FY 2027 it carries a relative weight of 3.0664 with a geometric mean length of stay of 6.5 days and an arithmetic mean of 8.7 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:
3.0664 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
6.5 days (used for transfer payments)
Average stay:
8.7 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
420Hepatobiliary Diagnostic Procedures with MCC (this page)3.06646.5 days
421Hepatobiliary Diagnostic Procedures with CC1.71213.3 days
422Hepatobiliary Diagnostic Procedures without CC/MCC1.42552.1 days

Procedure codes (113)

ICD-10-PCS procedures that can group a stay to DRG 420.