148 MS-DRG: EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITHOUT CC/MCC
MS-DRG 148 groups Medicare inpatient hospital stays for: EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITHOUT CC/MCC. This is a medical MS-DRG. It falls under MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 0.8008 |
| Relative Weight (10% Cap Applied) | 0.8008 |
| Geometric Mean Length of Stay | 2.2 days |
| Arithmetic Mean Length of Stay | 3 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
102 diagnosis codes can drive assignment here: C00.0, C00.1, C00.2, C00.3, C00.4, C00.5, C00.6, C00.8, C00.9, C01, C02.0, C02.1 and 90 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 148 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 03 — Diseases and Disorders of the Ear, Nose, Mouth and Throat[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (102)
- C00.0 — Malignant neoplasm of external upper lip[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.1 — Malignant neoplasm of external lower lip[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.2 — Malignant neoplasm of external lip, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.3 — Malignant neoplasm of upper lip, inner aspect[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.4 — Malignant neoplasm of lower lip, inner aspect[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.5 — Malignant neoplasm of lip, unspecified, inner aspect[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.6 — Malignant neoplasm of commissure of lip, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- C00.8 — Malignant neoplasm of overlapping sites of lip[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 94 more
DRG family
- DRG 146 — EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITH MCC[DRG family]: “EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITH MCC — same CMS DRG family (146-148), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 146-148) · FY2027
- DRG 147 — EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITH CC[DRG family]: “EAR, NOSE, MOUTH AND THROAT MALIGNANCY WITH CC — same CMS DRG family (146-148), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 146-148) · 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