All ICD10 Codes
MS-DRG 638Medical

Diabetes with CC

Major Diagnostic Category 10·Grouped by diagnosis·FY 2027

MS-DRG 638 is a Medical Medicare Severity Diagnosis Related Group under Major Diagnostic Category 10 (MDC 10) with a Complication or Comorbidity (CC). It maps to 8 ICD-10-CM diagnosis codes. For FY 2027 it carries a relative weight of 0.9019 with a geometric mean length of stay of 2.9 days and an arithmetic mean of 3.7 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:
0.9019 (payment multiplier vs. the average case (1.0))
Geometric mean stay:
2.9 days (used for transfer payments)
Average stay:
3.7 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
637Diabetes with MCC1.41293.9 days
638Diabetes with CC (this page)0.90192.9 days
639Diabetes without CC/MCC0.63762.1 days

Diagnosis codes (8)

As the principal diagnosis, these ICD-10-CM codes can group to DRG 638. 100% of the codes listed are billable.