180 MS-DRG: RESPIRATORY NEOPLASMS WITH MCC
MS-DRG 180 groups Medicare inpatient hospital stays for: RESPIRATORY NEOPLASMS WITH 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 | MCC |
| Relative Weight | 1.7806 |
| Relative Weight (10% Cap Applied) | 1.7806 |
| Geometric Mean Length of Stay | 4.7 days |
| Arithmetic Mean Length of Stay | 6.4 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
64 diagnosis codes can drive assignment here: C33, C34.00, C34.01, C34.02, C34.10, C34.11, C34.12, C34.2, C34.30, C34.31, C34.32, C34.80 and 52 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 180 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 (64)
- C33 — Malignant neoplasm of trachea[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.00 — Malignant neoplasm of unspecified main bronchus[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.01 — Malignant neoplasm of right main bronchus[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.02 — Malignant neoplasm of left main bronchus[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.10 — Malignant neoplasm of upper lobe, unspecified bronchus or lung[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.11 — Malignant neoplasm of upper lobe, right bronchus or lung[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.12 — Malignant neoplasm of upper lobe, left bronchus or lung[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C34.2 — Malignant neoplasm of middle lobe, bronchus or lung[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 56 more
DRG family
- DRG 181 — RESPIRATORY NEOPLASMS WITH CC[DRG family]: “RESPIRATORY NEOPLASMS WITH CC — same CMS DRG family (180-182), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 180-182) · FY2027
- DRG 182 — RESPIRATORY NEOPLASMS WITHOUT CC/MCC[DRG family]: “RESPIRATORY NEOPLASMS WITHOUT CC/MCC — same CMS DRG family (180-182), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 180-182) · 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