All ICD10 Codes

DRG 597

Medical DRG

Malignant Breast Disorders with MCC

TypeMedicalMDC09Dx Codes74

What is MS-DRG 597?

MS-DRG 597 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 09 (MDC 09) with a Major Complication or Comorbidity (MCC). It maps to 74 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 1.6671 with a geometric mean length of stay of 4.7 days and an arithmetic mean of 6.5 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

Classification
Medical DRG
Diagnosis-driven grouping
MDC
Major Diagnostic Category 09
Linked Codes
74 diagnosis
Billable Dx
100%
74 of 74 shown

FY 2026 Payment Data

Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).

Relative Weight
1.6671
Payment multiplier vs. average case (1.0)
Geometric Mean LOS
4.7 days
Used for transfer payment calculations
Arithmetic Mean LOS
6.5 days
Average length of stay
Post-Acute Transfer
No
Not subject to the transfer policy

Related MS-DRGs in This Severity Group

The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.

DRGTitleRel. WeightGMLOS
597Malignant Breast Disorders with MCCThis page1.66714.7 days
598Malignant Breast Disorders with CC1.13133.4 days
599Malignant Breast Disorders without CC/MCC0.76942.4 days

Linked ICD-10-CM Diagnosis Mappings

  • C50.011

    Malignant neoplasm of nipple and areola, right female breast

    BillableChapter 2
  • C50.012

    Malignant neoplasm of nipple and areola, left female breast

    BillableChapter 2
  • C50.019

    Malignant neoplasm of nipple and areola, unspecified female breast

    BillableChapter 2
  • C50.021

    Malignant neoplasm of nipple and areola, right male breast

    BillableChapter 2
  • C50.022

    Malignant neoplasm of nipple and areola, left male breast

    BillableChapter 2
  • C50.029

    Malignant neoplasm of nipple and areola, unspecified male breast

    BillableChapter 2
  • C50.111

    Malignant neoplasm of central portion of right female breast

    BillableChapter 2
  • C50.112

    Malignant neoplasm of central portion of left female breast

    BillableChapter 2
  • C50.119

    Malignant neoplasm of central portion of unspecified female breast

    BillableChapter 2
  • C50.121

    Malignant neoplasm of central portion of right male breast

    BillableChapter 2
  • C50.122

    Malignant neoplasm of central portion of left male breast

    BillableChapter 2
  • C50.129

    Malignant neoplasm of central portion of unspecified male breast

    BillableChapter 2
  • C50.211

    Malignant neoplasm of upper-inner quadrant of right female breast

    BillableChapter 2
  • C50.212

    Malignant neoplasm of upper-inner quadrant of left female breast

    BillableChapter 2
  • C50.219

    Malignant neoplasm of upper-inner quadrant of unspecified female breast

    BillableChapter 2
  • C50.221

    Malignant neoplasm of upper-inner quadrant of right male breast

    BillableChapter 2
  • C50.222

    Malignant neoplasm of upper-inner quadrant of left male breast

    BillableChapter 2
  • C50.229

    Malignant neoplasm of upper-inner quadrant of unspecified male breast

    BillableChapter 2
  • C50.311

    Malignant neoplasm of lower-inner quadrant of right female breast

    BillableChapter 2
  • C50.312

    Malignant neoplasm of lower-inner quadrant of left female breast

    BillableChapter 2
  • C50.319

    Malignant neoplasm of lower-inner quadrant of unspecified female breast

    BillableChapter 2
  • C50.321

    Malignant neoplasm of lower-inner quadrant of right male breast

    BillableChapter 2
  • C50.322

    Malignant neoplasm of lower-inner quadrant of left male breast

    BillableChapter 2
  • C50.329

    Malignant neoplasm of lower-inner quadrant of unspecified male breast

    BillableChapter 2
  • C50.411

    Malignant neoplasm of upper-outer quadrant of right female breast

    BillableChapter 2
  • C50.412

    Malignant neoplasm of upper-outer quadrant of left female breast

    BillableChapter 2
  • C50.419

    Malignant neoplasm of upper-outer quadrant of unspecified female breast

    BillableChapter 2
  • C50.421

    Malignant neoplasm of upper-outer quadrant of right male breast

    BillableChapter 2
  • C50.422

    Malignant neoplasm of upper-outer quadrant of left male breast

    BillableChapter 2
  • C50.429

    Malignant neoplasm of upper-outer quadrant of unspecified male breast

    BillableChapter 2
  • C50.511

    Malignant neoplasm of lower-outer quadrant of right female breast

    BillableChapter 2
  • C50.512

    Malignant neoplasm of lower-outer quadrant of left female breast

    BillableChapter 2
  • C50.519

    Malignant neoplasm of lower-outer quadrant of unspecified female breast

    BillableChapter 2
  • C50.521

    Malignant neoplasm of lower-outer quadrant of right male breast

    BillableChapter 2
  • C50.522

    Malignant neoplasm of lower-outer quadrant of left male breast

    BillableChapter 2
  • C50.529

    Malignant neoplasm of lower-outer quadrant of unspecified male breast

    BillableChapter 2
  • C50.611

    Malignant neoplasm of axillary tail of right female breast

    BillableChapter 2
  • C50.612

    Malignant neoplasm of axillary tail of left female breast

    BillableChapter 2
  • C50.619

    Malignant neoplasm of axillary tail of unspecified female breast

    BillableChapter 2
  • C50.621

    Malignant neoplasm of axillary tail of right male breast

    BillableChapter 2
  • C50.622

    Malignant neoplasm of axillary tail of left male breast

    BillableChapter 2
  • C50.629

    Malignant neoplasm of axillary tail of unspecified male breast

    BillableChapter 2
  • C50.811

    Malignant neoplasm of overlapping sites of right female breast

    BillableChapter 2
  • C50.812

    Malignant neoplasm of overlapping sites of left female breast

    BillableChapter 2
  • C50.819

    Malignant neoplasm of overlapping sites of unspecified female breast

    BillableChapter 2
  • C50.821

    Malignant neoplasm of overlapping sites of right male breast

    BillableChapter 2
  • C50.822

    Malignant neoplasm of overlapping sites of left male breast

    BillableChapter 2
  • C50.829

    Malignant neoplasm of overlapping sites of unspecified male breast

    BillableChapter 2
  • C50.911

    Malignant neoplasm of unspecified site of right female breast

    BillableChapter 2
  • C50.912

    Malignant neoplasm of unspecified site of left female breast

    BillableChapter 2
  • C50.919

    Malignant neoplasm of unspecified site of unspecified female breast

    BillableChapter 2
  • C50.921

    Malignant neoplasm of unspecified site of right male breast

    BillableChapter 2
  • C50.922

    Malignant neoplasm of unspecified site of left male breast

    BillableChapter 2
  • C50.929

    Malignant neoplasm of unspecified site of unspecified male breast

    BillableChapter 2
  • C50.A0

    Malignant inflammatory neoplasm of unspecified breast

    BillableChapter 2
  • C50.A1

    Malignant inflammatory neoplasm of right breast

    BillableChapter 2
  • C50.A2

    Malignant inflammatory neoplasm of left breast

    BillableChapter 2
  • C79.2

    Secondary malignant neoplasm of skin

    BillableChapter 2
  • C79.81

    Secondary malignant neoplasm of breast

    BillableChapter 2
  • D05.00

    Lobular carcinoma in situ of unspecified breast

    BillableChapter 2
  • D05.01

    Lobular carcinoma in situ of right breast

    BillableChapter 2
  • D05.02

    Lobular carcinoma in situ of left breast

    BillableChapter 2
  • D05.10

    Intraductal carcinoma in situ of unspecified breast

    BillableChapter 2
  • D05.11

    Intraductal carcinoma in situ of right breast

    BillableChapter 2
  • D05.12

    Intraductal carcinoma in situ of left breast

    BillableChapter 2
  • D05.80

    Other specified type of carcinoma in situ of unspecified breast

    BillableChapter 2
  • D05.81

    Other specified type of carcinoma in situ of right breast

    BillableChapter 2
  • D05.82

    Other specified type of carcinoma in situ of left breast

    BillableChapter 2
  • D05.90

    Unspecified type of carcinoma in situ of unspecified breast

    BillableChapter 2
  • D05.91

    Unspecified type of carcinoma in situ of right breast

    BillableChapter 2
  • D05.92

    Unspecified type of carcinoma in situ of left breast

    BillableChapter 2
  • D48.60

    Neoplasm of uncertain behavior of unspecified breast

    BillableChapter 2
  • D48.61

    Neoplasm of uncertain behavior of right breast

    BillableChapter 2
  • D48.62

    Neoplasm of uncertain behavior of left breast

    BillableChapter 2