All ICD10 Codes
MS-DRG 809Medical

Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders with CC

Major Diagnostic Category 16·Grouped by diagnosis·FY 2027

MS-DRG 809 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 16 (MDC 16) with a Complication or Comorbidity (CC). It maps to 63 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 1.2262 with a geometric mean length of stay of 3.3 days and an arithmetic mean of 4.2 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:
1.2262 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
3.3 days (used for transfer payments)
Average stay:
4.2 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
808Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders with MCC2.17055.1 days
809Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders with CC (this page)1.22623.3 days
810Major Hematological and Immunological Diagnoses Except Sickle Cell Crisis and Coagulation Disorders without CC/MCC1.07502.5 days

Diagnosis codes (63)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 809. 100% of the codes listed are billable.