812 MS-DRG: RED BLOOD CELL DISORDERS WITHOUT MCC
MS-DRG 812 groups Medicare inpatient hospital stays for: RED BLOOD CELL DISORDERS WITHOUT MCC. This is a medical MS-DRG. It falls under MDC 16 (Diseases and Disorders of Blood, Blood Forming Organs and Immunologic Disorders).
Payment & Classification Data
Official CMS values from the FY2027 IPPS Final Rule Table 5.
| Major Diagnostic Category | MDC 16 — Diseases and Disorders of Blood, Blood Forming Organs and Immunologic Disorders |
| DRG Type | Medical |
| Severity Level | None |
| Relative Weight | 0.9234 |
| Relative Weight (10% Cap Applied) | 0.9234 |
| Geometric Mean Length of Stay | 2.8 days |
| Arithmetic Mean Length of Stay | 3.6 days |
| Post-Acute Transfer DRG | No |
| Special Pay Transfer DRG | No |
Defining Codes (FY2027)
134 diagnosis codes can drive assignment here: D46.0, D46.1, D46.20, D46.21, D46.22, D46.4, D46.9, D46.A, D46.B, D46.C, D46.Z, D50.0 and 122 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 812 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 16 — Diseases and Disorders of Blood, Blood Forming Organs and Immunologic Disorders[MDC]— CMS MS-DRG Definitions Manual · FY2027
Defining diagnoses (134)
- D46.0 — Refractory anemia without ring sideroblasts, so stated[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.1 — Refractory anemia with ring sideroblasts[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.20 — Refractory anemia with excess of blasts, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.21 — Refractory anemia with excess of blasts 1[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.22 — Refractory anemia with excess of blasts 2[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.4 — Refractory anemia, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.9 — Myelodysplastic syndrome, unspecified[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- D46.A — Refractory cytopenia with multilineage dysplasia[Grouper diagnosis]— CMS MS-DRG Definitions Manual (Appendix B) · FY2027
- and 126 more
DRG family
- DRG 811 — RED BLOOD CELL DISORDERS WITH MCC[DRG family]: “RED BLOOD CELL DISORDERS WITH MCC — same CMS DRG family (811-812), split by severity.”— CMS MS-DRG Definitions Manual (DRG family 811-812) · 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