421 MS-DRG: HEPATOBILIARY DIAGNOSTIC PROCEDURES WITH CC
MS-DRG 421 groups Medicare inpatient hospital stays for: HEPATOBILIARY DIAGNOSTIC PROCEDURES WITH CC. This is a surgical MS-DRG. It falls under MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas).
Payment & Classification Data
Official CMS values from the current fiscal year's IPPS Final Rule.
| Major Diagnostic Category | MDC 07 — Diseases and Disorders of the Hepatobiliary System and Pancreas |
| DRG Type | Surgical |
| Severity Level | CC |
| Relative Weight | 1.7375 |
| Relative Weight (10% Cap Applied) | 1.7375 |
| Geometric Mean Length of Stay | 3.4 days |
| Arithmetic Mean Length of Stay | 4.5 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2026)
112 procedure codes appear in its surgical logic (Hepatobiliary Diagnostic Procedures: 112): 07JP0ZZ, 0D9U0ZX, 0D9U4ZX, 0D9V0ZX, 0D9V4ZX, 0D9W0ZX, 0D9W4ZX, 0DBU0ZX, 0DBV0ZX, 0DBW0ZX, 0DJ00ZZ, 0DJ60ZZ and 100 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 (FY2026)
Within MDC 07, 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. Pancreas, Liver and Shunt Procedures (DRGs 405-407)
- 2. Biliary Tract Procedures Except Only Cholecystectomy with or without C.D.E. (DRGs 408-410)
- 3. Cholecystectomy (DRGs 411-419)
- 4. Hepatobiliary Diagnostic Procedures (DRGs 420-422) — this DRG
- 5. Other Hepatobiliary or Pancreas O.R. Procedures (DRGs 423-425)
From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.
Contextual Map
Every relationship of 421 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 07 — Diseases and Disorders of the Hepatobiliary System and Pancreas[MDC]— CMS MS-DRG Definitions Manual · FY2026
Defining procedures (112)
- 07JP0ZZ — Inspection of Spleen, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9U0ZX — Drainage of Omentum, Open Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9U4ZX — Drainage of Omentum, Percutaneous Endoscopic Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9V0ZX — Drainage of Mesentery, Open Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9V4ZX — Drainage of Mesentery, Percutaneous Endoscopic Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9W0ZX — Drainage of Peritoneum, Open Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0D9W4ZX — Drainage of Peritoneum, Percutaneous Endoscopic Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- 0DBU0ZX — Excision of Omentum, Open Approach, Diagnostic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
- and 104 more
DRG family
- DRG 420 — HEPATOBILIARY DIAGNOSTIC PROCEDURES WITH MCC[DRG family]: “HEPATOBILIARY DIAGNOSTIC PROCEDURES WITH MCC — same CMS DRG family (420-422), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 420-422) · FY2026
- DRG 422 — HEPATOBILIARY DIAGNOSTIC PROCEDURES WITHOUT CC/MCC[DRG family]: “HEPATOBILIARY DIAGNOSTIC PROCEDURES WITHOUT CC/MCC — same CMS DRG family (420-422), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 420-422) · FY2026
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 — v43. All data sources · How to read the labels