All ICD10 Codes
MS-DRG 146Medical

Ear, Nose, Mouth and Throat Malignancy with MCC

Major Diagnostic Category 03·Grouped by diagnosis·FY 2027

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 2027 it carries a relative weight of 2.1329 with a geometric mean length of stay of 5.6 days and an arithmetic mean of 8.3 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

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FY 2027 payment data

From Table 5 of the FY 2027 IPPS Final Rule (CMS).

Relative weight:
2.1329 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
5.6 days (used for transfer payments)
Average stay:
8.3 days (arithmetic mean)
Post-acute transfer policy:
No (not subject to it)

Same condition, other severity levels

CMS splits one condition into separate DRGs by how sick the patient is. With MCC pays more than with CC, which pays more than without CC/MCC.

DRGTitleRelative weightMean stay
146Ear, Nose, Mouth and Throat Malignancy with MCC (this page)2.13295.6 days
147Ear, Nose, Mouth and Throat Malignancy with CC1.30553.5 days
148Ear, Nose, Mouth and Throat Malignancy without CC/MCC0.80082.2 days

Diagnosis codes (9)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 146. 100% of the codes listed are billable.