All ICD10 Codes
MS-DRG 816Medical

Reticuloendothelial and Immunity Disorders without CC/MCC

Major Diagnostic Category 16·Grouped by diagnosis·FY 2027

MS-DRG 816 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 16 (MDC 16) without a significant Complication or Comorbidity. It maps to 137 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 0.7381 with a geometric mean length of stay of 2.1 days and an arithmetic mean of 2.6 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:
0.7381 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
2.1 days (used for transfer payments)
Average stay:
2.6 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
814Reticuloendothelial and Immunity Disorders with MCC2.07294.8 days
815Reticuloendothelial and Immunity Disorders with CC1.04443 days
816Reticuloendothelial and Immunity Disorders without CC/MCC (this page)0.73812.1 days

Diagnosis codes (137)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 816. 100% of the codes listed are billable.