637 MS-DRG: DIABETES WITH MCC
MS-DRG 637 groups Medicare inpatient hospital stays for: DIABETES WITH MCC. This is a medical MS-DRG. It falls under MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 10 — Endocrine, Nutritional and Metabolic Diseases and Disorders |
| DRG Type | Medical |
| Severity Level | MCC |
| Relative Weight | 1.4129 |
| Relative Weight (10% Cap Applied) | 1.4129 |
| Geometric Mean Length of Stay | 3.9 days |
| Arithmetic Mean Length of Stay | 5.2 days |
| Post-Acute Transfer DRG | Yes |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
88 diagnosis codes can drive assignment here: E08.00, E08.01, E08.10, E08.11, E08.618, E08.620, E08.621, E08.622, E08.628, E08.630, E08.638, E08.641 and 76 more.
From the CMS MS-DRG Definitions Manual (Appendices B and E). Assignment also depends on severity, discharge status and the rest of the claim.
Contextual Map
Every relationship of 637 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Major Diagnostic Category
- MDC 10 — Endocrine, Nutritional and Metabolic Diseases and Disorders[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (88)
- E08.00 — Diabetes mellitus due to underlying condition with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.01 — Diabetes mellitus due to underlying condition with hyperosmolarity with coma[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.10 — Diabetes mellitus due to underlying condition with ketoacidosis without coma[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.11 — Diabetes mellitus due to underlying condition with ketoacidosis with coma[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.618 — Diabetes mellitus due to underlying condition with other diabetic arthropathy[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.620 — Diabetes mellitus due to underlying condition with diabetic dermatitis[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.621 — Diabetes mellitus due to underlying condition with foot ulcer[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- E08.622 — Diabetes mellitus due to underlying condition with other skin ulcer[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 80 more
DRG family
- DRG 638 — DIABETES WITH CC[DRG family]: “DIABETES WITH CC — same CMS DRG family (637-639), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 637-639) · FY2027
- DRG 639 — DIABETES WITHOUT CC/MCC[DRG family]: “DIABETES WITHOUT CC/MCC — same CMS DRG family (637-639), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 637-639) · FY2027
Read from: CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v44. All data sources · How to read the labels · How MedCoder verifies its implementation
Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources