399 MS-DRG: APPENDIX PROCEDURES WITHOUT CC/MCC

Defining Codes (FY2026)

57 procedure codes appear in its surgical logic (Appendix Procedures: 57): 0D5J0Z3, 0D5J0ZZ, 0D5J3Z3, 0D5J3ZZ, 0D5J4Z3, 0D5J4ZZ, 0D5J7ZZ, 0D5J8ZZ, 0D9J00Z, 0D9J0ZX, 0D9J0ZZ, 0D9J3ZX and 45 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 06, this DRG ranks 5 of 9 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. Stomach, Esophageal and Duodenal Procedures (DRGs 326-328)
• 2. Major Small and Large Bowel Procedures (DRGs 329-331)
• 3. Rectal Resection (DRGs 332-334)
• 4. Peritoneal Adhesiolysis (DRGs 335-337)
• 5. Appendix Procedures (DRGs 397-399) — this DRG
• 6. Minor Small and Large Bowel Procedures (DRGs 344-346)
• 7. Anal and Stomal Procedures (DRGs 347-349)
• 8. Hernia Procedures (DRGs 350-355)
• 9. Other Digestive System O.R. Procedures (DRGs 356-358)

From the CMS MS-DRG Definitions Manual, Appendix D. Actual DRG assignment depends on the complete claim.

Contextual Map

Every relationship of 399 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 06 — Diseases and Disorders of the Digestive System[MDC]— CMS MS-DRG Definitions Manual · FY2026

Defining procedures (57)

• 0D5J0Z3 — Destruction of Appendix using Laser Interstitial Thermal Therapy, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J0ZZ — Destruction of Appendix, Open Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J3Z3 — Destruction of Appendix using Laser Interstitial Thermal Therapy, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J3ZZ — Destruction of Appendix, Percutaneous Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J4Z3 — Destruction of Appendix using Laser Interstitial Thermal Therapy, Percutaneous Endoscopic Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J4ZZ — Destruction of Appendix, Percutaneous Endoscopic Approach[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J7ZZ — Destruction of Appendix, Via Natural or Artificial Opening[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• 0D5J8ZZ — Destruction of Appendix, Via Natural or Artificial Opening Endoscopic[Grouper procedure]— CMS MS-DRG Definitions Manual (Appendix E) · FY2026
• and 49 more

DRG family

• DRG 397 — APPENDIX PROCEDURES WITH MCC[DRG family]: “APPENDIX PROCEDURES WITH MCC — same CMS DRG family (397-399), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 397-399) · FY2026
• DRG 398 — APPENDIX PROCEDURES WITH CC[DRG family]: “APPENDIX PROCEDURES WITH CC — same CMS DRG family (397-399), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 397-399) · FY2026