MS-DRG 845Medical

Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC

Major Diagnostic Category 17·Grouped by diagnosis·FY 2027

MS-DRG 845 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 17 (MDC 17) without a significant Complication or Comorbidity. It maps to 106 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 0.8447 with a geometric mean length of stay of 2.3 days and an arithmetic mean of 3 days. Hospitals use this grouping to determine reimbursement for inpatient stays under Medicare.

FY 2027 payment data

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

Relative weight:: 0.8447 (payment multiplier vs. the average case (1.0))
Geometric mean stay:: 2.3 days (used for transfer payments)
Average stay:: 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.

DRG	Title	Relative weight	Mean stay
843	Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with MCC	1.9453	5.3 days
844	Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses with CC	1.2551	3.7 days
845	Other Myeloproliferative Disorders or Poorly Differentiated Neoplastic Diagnoses without CC/MCC (this page)	0.8447	2.3 days

Diagnosis codes (106)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 845. 100% of the codes listed are billable.