189 MS-DRG: PULMONARY EDEMA AND RESPIRATORY FAILURE
MS-DRG 189 groups Medicare inpatient hospital stays for: PULMONARY EDEMA AND RESPIRATORY FAILURE. This is a medical MS-DRG. It falls under MDC 04 (Diseases and Disorders of the Respiratory System).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 04 — Diseases and Disorders of the Respiratory System |
| DRG Type | Medical |
| Severity Level | N/A |
| Relative Weight | 1.2108 |
| Relative Weight (10% Cap Applied) | 1.2108 |
| Geometric Mean Length of Stay | 3.4 days |
| Arithmetic Mean Length of Stay | 4.6 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
22 diagnosis codes can drive assignment here: J18.2, J68.1, J80, J81.0, J81.1, J95.1, J95.2, J95.3, J95.821, J95.822, J96.00, J96.01 and 10 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 189 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 04 — Diseases and Disorders of the Respiratory System[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (22)
- J18.2 — Hypostatic pneumonia, unspecified organism[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J68.1 — Pulmonary edema due to chemicals, gases, fumes and vapors[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J80 — Acute respiratory distress syndrome[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J81.0 — Acute pulmonary edema[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J81.1 — Chronic pulmonary edema[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J95.1 — Acute pulmonary insufficiency following thoracic surgery[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J95.2 — Acute pulmonary insufficiency following nonthoracic surgery[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- J95.3 — Chronic pulmonary insufficiency following surgery[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 14 more
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 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources