446 MS-DRG: DISORDERS OF THE BILIARY TRACT WITHOUT CC/MCC
MS-DRG 446 groups Medicare inpatient hospital stays for: DISORDERS OF THE BILIARY TRACT WITHOUT CC/MCC. This is a medical MS-DRG. It falls under MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 07 — Diseases and Disorders of the Hepatobiliary System and Pancreas |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 0.8124 |
| Relative Weight (10% Cap Applied) | 0.8124 |
| Geometric Mean Length of Stay | 2.1 days |
| Arithmetic Mean Length of Stay | 2.5 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
72 diagnosis codes can drive assignment here: K80.00, K80.01, K80.10, K80.11, K80.12, K80.13, K80.18, K80.19, K80.20, K80.21, K80.30, K80.31 and 60 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.
Contextual Map
Every relationship of 446 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 · FY2027
Defining diagnoses (72)
- K80.00 — Calculus of gallbladder with acute cholecystitis without obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.01 — Calculus of gallbladder with acute cholecystitis with obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.10 — Calculus of gallbladder with chronic cholecystitis without obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.11 — Calculus of gallbladder with chronic cholecystitis with obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.12 — Calculus of gallbladder with acute and chronic cholecystitis without obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.13 — Calculus of gallbladder with acute and chronic cholecystitis with obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.18 — Calculus of gallbladder with other cholecystitis without obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- K80.19 — Calculus of gallbladder with other cholecystitis with obstruction[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 64 more
DRG family
- DRG 444 — DISORDERS OF THE BILIARY TRACT WITH MCC[DRG family]: “DISORDERS OF THE BILIARY TRACT WITH MCC — same CMS DRG family (444-446), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 444-446) · FY2027
- DRG 445 — DISORDERS OF THE BILIARY TRACT WITH CC[DRG family]: “DISORDERS OF THE BILIARY TRACT WITH CC — same CMS DRG family (444-446), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 444-446) · 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