MS-DRG 583Surgical

Mastectomy for Malignancy without CC/MCC

Major Diagnostic Category 09·Grouped by procedure·FY 2027

MS-DRG 583 is a Surgical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 09 (MDC 09) without a significant Complication or Comorbidity. It maps to 74 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 1.8006 with a geometric mean length of stay of 2.1 days and an arithmetic mean of 2.8 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:
1.8006 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
2.1 days (used for transfer payments)
Average stay:
2.8 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
582Mastectomy for Malignancy with CC/MCC1.80062.1 days
583Mastectomy for Malignancy without CC/MCC (this page)1.80062.1 days

Procedure codes (61)

ICD-10-PCS procedures that can group a stay to DRG 583.

Diagnosis codes (74)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 583. 100% of the codes listed are billable.