DRG 146
Medical DRGEar, Nose, Mouth and Throat Malignancy with MCC
What is MS-DRG 146?
MS-DRG 146 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 03 (MDC 03) with a Major Complication or Comorbidity (MCC). It maps to 9 ICD-10-CM diagnosis codes. For FY 2026 it carries a relative weight of 2.1174 with a geometric mean length of stay of 5.5 days and an arithmetic mean of 8 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.
FY 2026 Payment Data
Official values from Table 5 of the FY 2026 IPPS Final Rule (CMS).
Related MS-DRGs in This Severity Group
The same clinical condition is split into separate DRGs by complication severity. MCC pays more than CC, which pays more than no CC/MCC.
Linked ICD-10-CM Diagnosis Mappings
- B99.9
Unspecified infectious disease
BillableChapter 1 - C26.9
Malignant neoplasm of ill-defined sites within the digestive system
BillableChapter 2 - C38.8
Malignant neoplasm of overlapping sites of heart, mediastinum and pleura
BillableChapter 2 - C46.1
Kaposi's sarcoma of soft tissue
BillableChapter 2 - C75.9
Malignant neoplasm of endocrine gland, unspecified
BillableChapter 2 - C96.Z
Other specified malignant neoplasms of lymphoid, hematopoietic and related tissue
BillableChapter 2 - D01.9
Carcinoma in situ of digestive organ, unspecified
BillableChapter 2 - D36.9
Benign neoplasm, unspecified site
BillableChapter 2 - D37.9
Neoplasm of uncertain behavior of digestive organ, unspecified
BillableChapter 2