582 MS-DRG: MASTECTOMY FOR MALIGNANCY WITH CC/MCC
MS-DRG 582 groups Medicare inpatient hospital stays for: MASTECTOMY FOR MALIGNANCY WITH CC/MCC. This is a surgical MS-DRG. It falls under MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast |
| DRG Type | Surgical |
| Severity Level | CC/MCC |
| Relative Weight | 1.8006 |
| Relative Weight (10% Cap Applied) | 1.8006 |
| Geometric Mean Length of Stay | 2.1 days |
| Arithmetic Mean Length of Stay | 2.8 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
74 diagnosis codes can drive assignment here: C50.011, C50.012, C50.019, C50.021, C50.022, C50.029, C50.111, C50.112, C50.119, C50.121, C50.122, C50.129 and 62 more.
59 procedure codes appear in its surgical logic (Mastectomy for Malignancy: 59): 0H0V0JZ, 0HBT0ZZ, 0HBT3ZZ, 0HBU0ZZ, 0HBU3ZZ, 0HBV0ZZ, 0HBV3ZZ, 0HRT075, 0HRT076, 0HRT077, 0HRT078, 0HRT079 and 47 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Surgical Precedence (FY2027)
Within MDC 09, this DRG ranks 4 of 5 in CMS's surgical-class precedence order. When a claim qualifies for more than one surgical DRG in this MDC, the highest-ranked class applies.
- 1. Skin Graft (DRGs 573-578)
- 2. Skin Debridement (DRGs 570-572)
- 3. Other Skin, Subcutaneous Tissue and Breast Procedures (DRGs 579-581)
- 4. Mastectomy for Malignancy (DRGs 582-583) — this DRG
- 5. Breast Biopsy, Local Excision and Other Breast Procedures (DRGs 584-585)
From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.
Contextual Map
Every relationship of 582 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 09 — Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (74)
- C50.011 — Malignant neoplasm of nipple and areola, right female breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.012 — Malignant neoplasm of nipple and areola, left female breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.019 — Malignant neoplasm of nipple and areola, unspecified female breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.021 — Malignant neoplasm of nipple and areola, right male breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.022 — Malignant neoplasm of nipple and areola, left male breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.029 — Malignant neoplasm of nipple and areola, unspecified male breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.111 — Malignant neoplasm of central portion of right female breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C50.112 — Malignant neoplasm of central portion of left female breast[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 66 more
Defining procedures (59)
- 0H0V0JZ — Alteration of Bilateral Breast with Synthetic Substitute, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBT0ZZ — Excision of Right Breast, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBT3ZZ — Excision of Right Breast, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBU0ZZ — Excision of Left Breast, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBU3ZZ — Excision of Left Breast, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBV0ZZ — Excision of Bilateral Breast, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HBV3ZZ — Excision of Bilateral Breast, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- 0HRT075 — Replacement of Right Breast using Latissimus Dorsi Myocutaneous Flap, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2027
- and 51 more
DRG family
- DRG 583 — MASTECTOMY FOR MALIGNANCY WITHOUT CC/MCC[DRG family]: “MASTECTOMY FOR MALIGNANCY WITHOUT CC/MCC — same CMS DRG family (582-583), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 582-583) · FY2027
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels · How MedCoder verifies its implementation
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources