203 MS-DRG: BRONCHITIS AND ASTHMA WITHOUT CC/MCC
MS-DRG 203 groups Medicare inpatient hospital stays for: BRONCHITIS AND ASTHMA WITHOUT CC/MCC. 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 | None |
| Relative Weight | 0.6512 |
| Relative Weight (10% Cap Applied) | 0.6512 |
| Geometric Mean Length of Stay | 2.1 days |
| Arithmetic Mean Length of Stay | 2.6 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
47 diagnosis codes can drive assignment here: A37.00, A37.01, A37.10, A37.11, A37.80, A37.81, A37.90, A37.91, J04.10, J04.11, J20.0, J20.1 and 35 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 203 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 (47)
- A37.00 — Whooping cough due to Bordetella pertussis without pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.01 — Whooping cough due to Bordetella pertussis with pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.10 — Whooping cough due to Bordetella parapertussis without pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.11 — Whooping cough due to Bordetella parapertussis with pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.80 — Whooping cough due to other Bordetella species without pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.81 — Whooping cough due to other Bordetella species with pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.90 — Whooping cough, unspecified species without pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- A37.91 — Whooping cough, unspecified species with pneumonia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 39 more
DRG family
- DRG 202 — BRONCHITIS AND ASTHMA WITH CC/MCC[DRG family]: “BRONCHITIS AND ASTHMA WITH CC/MCC — same CMS DRG family (202-203), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 202-203) · 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