All ICD10 Codes
MS-DRG 643Medical

Endocrine Disorders with MCC

Major Diagnostic Category 10·Grouped by diagnosis·FY 2027

MS-DRG 643 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 10 (MDC 10) with a Major Complication or Comorbidity (MCC). It maps to 174 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 1.6139 with a geometric mean length of stay of 4.8 days and an arithmetic mean of 6.1 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:
1.6139 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
4.8 days (used for transfer payments)
Average stay:
6.1 days (arithmetic mean)
Post-acute transfer policy:
Yes (early transfers can be paid less)

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
643Endocrine Disorders with MCC (this page)1.61394.8 days
644Endocrine Disorders with CC1.00443.4 days
645Endocrine Disorders without CC/MCC0.74592.6 days

Diagnosis codes (174)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 643. 100% of the codes listed are billable.