MS-DRG v44.0 · MDC 16: Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders
812 — Red Blood Cell Disorders without MCC
Source: CMS MS-DRG v44.0 and FY2027 IPPS final rule. Page updated September 29, 2026.
- Relative weight
- 0.9234
- Geometric mean LOS
- 2.8 days
- Arithmetic mean LOS
- 3.6 days
- Type
- Medical
About MS-DRG 812
MS-DRG 812, Red Blood Cell Disorders without MCC, is a medical DRG in MDC 16 (Diseases and Disorders of the Blood and Blood Forming Organs and Immunological Disorders) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 0.9234, so Medicare's base payment for this DRG is about 0.92 times the average inpatient case (below average), before hospital-specific adjustments. The geometric mean length of stay is 2.8 days and the arithmetic mean is 3.6 days.
It belongs to a 2-level severity family: DRG 811 (with MCC, weight 1.3988) and DRG 812 (without MCC, weight 0.9234). The highest-severity level carries 1.5 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
134 ICD-10-CM diagnosis codes are part of this DRG's grouping logic; they are listed below.
ICD-10-CM codes that group to DRG 812 (134)
Chapter 2: Neoplasms
- D46.0Refractory anemia without ring sideroblasts, so stated
- D46.1Refractory anemia with ring sideroblasts
- D46.20Refractory anemia with excess of blasts, unspecified
- D46.21Refractory anemia with excess of blasts 1
- D46.22Refractory anemia with excess of blasts 2
- D46.4Refractory anemia, unspecified
- D46.9Myelodysplastic syndrome, unspecified
- D46.ARefractory cytopenia with multilineage dysplasia
- D46.BRefractory cytopenia with multilineage dysplasia and ring sideroblasts
- D46.CMyelodysplastic syndrome with isolated del(5q) chromosomal abnormality
- D46.ZOther myelodysplastic syndromes
Chapter 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- D50.0Iron deficiency anemia secondary to blood loss (chronic)
- D50.1Sideropenic dysphagia
- D50.8Other iron deficiency anemias
- D50.9Iron deficiency anemia, unspecified
- D51.0Vitamin B12 deficiency anemia due to intrinsic factor deficiency
- D51.1Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria
- D51.2Transcobalamin II deficiency
- D51.3Other dietary vitamin B12 deficiency anemia
- D51.8Other vitamin B12 deficiency anemias
- D51.9Vitamin B12 deficiency anemia, unspecified
- D52.0Dietary folate deficiency anemia
- D52.1Drug-induced folate deficiency anemia
- D52.8Other folate deficiency anemias
- D52.9Folate deficiency anemia, unspecified
- D53.0Protein deficiency anemia
- D53.1Other megaloblastic anemias, not elsewhere classified
- D53.2Scorbutic anemia
- D53.8Other specified nutritional anemias
- D53.9Nutritional anemia, unspecified
- D55.0Anemia due to glucose-6-phosphate dehydrogenase [G6PD] deficiency
- D55.1Anemia due to other disorders of glutathione metabolism
- D55.21Anemia due to pyruvate kinase deficiency
- D55.29Anemia due to other disorders of glycolytic enzymes
- D55.3Anemia due to disorders of nucleotide metabolism
- D55.8Other anemias due to enzyme disorders
- D55.9Anemia due to enzyme disorder, unspecified
- D56.0Alpha thalassemia
- D56.1Beta thalassemia
- D56.2Delta-beta thalassemia
- D56.3Thalassemia minor
- D56.4Hereditary persistence of fetal hemoglobin [HPFH]
- D56.5Hemoglobin E-beta thalassemia
- D56.8Other thalassemias
- D56.9Thalassemia, unspecified
- D57.00Hb-SS disease with crisis, unspecified
- D57.01Hb-SS disease with acute chest syndrome
- D57.02Hb-SS disease with splenic sequestration
- D57.03Hb-SS disease with cerebral vascular involvement
- D57.04Hb-SS disease with dactylitis
- D57.09Hb-SS disease with crisis with other specified complication
- D57.1Sickle-cell disease without crisis
- D57.20Sickle-cell/Hb-C disease without crisis
- D57.211Sickle-cell/Hb-C disease with acute chest syndrome
- D57.212Sickle-cell/Hb-C disease with splenic sequestration
- D57.213Sickle-cell/Hb-C disease with cerebral vascular involvement
- D57.214Sickle-cell/Hb-C disease with dactylitis
- D57.218Sickle-cell/Hb-C disease with crisis with other specified complication
- D57.219Sickle-cell/Hb-C disease with crisis, unspecified
- D57.3Sickle-cell trait
- D57.40Sickle-cell thalassemia without crisis
- D57.411Sickle-cell thalassemia, unspecified, with acute chest syndrome
- D57.412Sickle-cell thalassemia, unspecified, with splenic sequestration
- D57.413Sickle-cell thalassemia, unspecified, with cerebral vascular involvement
- D57.414Sickle-cell thalassemia, unspecified, with dactylitis
- D57.418Sickle-cell thalassemia, unspecified, with crisis with other specified complication
- D57.419Sickle-cell thalassemia, unspecified, with crisis
- D57.42Sickle-cell thalassemia beta zero without crisis
- D57.431Sickle-cell thalassemia beta zero with acute chest syndrome
- D57.432Sickle-cell thalassemia beta zero with splenic sequestration
- D57.433Sickle-cell thalassemia beta zero with cerebral vascular involvement
- D57.434Sickle-cell thalassemia beta zero with dactylitis
- D57.438Sickle-cell thalassemia beta zero with crisis with other specified complication
- D57.439Sickle-cell thalassemia beta zero with crisis, unspecified
- D57.44Sickle-cell thalassemia beta plus without crisis
- D57.451Sickle-cell thalassemia beta plus with acute chest syndrome
- D57.452Sickle-cell thalassemia beta plus with splenic sequestration
- D57.453Sickle-cell thalassemia beta plus with cerebral vascular involvement
- D57.454Sickle-cell thalassemia beta plus with dactylitis
- D57.458Sickle-cell thalassemia beta plus with crisis with other specified complication
- D57.459Sickle-cell thalassemia beta plus with crisis, unspecified
- D57.80Other sickle-cell disorders without crisis
- D57.811Other sickle-cell disorders with acute chest syndrome
- D57.812Other sickle-cell disorders with splenic sequestration
- D57.813Other sickle-cell disorders with cerebral vascular involvement
- D57.814Other sickle-cell disorders with dactylitis
- D57.818Other sickle-cell disorders with crisis with other specified complication
- D57.819Other sickle-cell disorders with crisis, unspecified
- D58.0Hereditary spherocytosis
- D58.1Hereditary elliptocytosis
- D58.2Other hemoglobinopathies
- D58.8Other specified hereditary hemolytic anemias
- D58.9Hereditary hemolytic anemia, unspecified
- D59.30Hemolytic-uremic syndrome, unspecified
- D59.31Infection-associated hemolytic-uremic syndrome
- D59.32Hereditary hemolytic-uremic syndrome
- D59.39Other hemolytic-uremic syndrome
- D62Acute posthemorrhagic anemia
- D63.0Anemia in neoplastic disease
- D63.1Anemia in chronic kidney disease
- D63.8Anemia in other chronic diseases classified elsewhere
- D64.0Hereditary sideroblastic anemia
- D64.1Secondary sideroblastic anemia due to disease
- D64.2Secondary sideroblastic anemia due to drugs and toxins
- D64.3Other sideroblastic anemias
- D64.4Congenital dyserythropoietic anemia
- D64.81Anemia due to antineoplastic chemotherapy
- D64.89Other specified anemias
- D64.9Anemia, unspecified
- D74.0Congenital methemoglobinemia
- D74.8Other methemoglobinemias
- D74.9Methemoglobinemia, unspecified
Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
Chapter 19: Injury, poisoning and certain other consequences of external causes
- T80.30XAABO incompatibility reaction due to transfusion of blood or blood products, unspecified, initial encounter
- T80.310AABO incompatibility with acute hemolytic transfusion reaction, initial encounter
- T80.311AABO incompatibility with delayed hemolytic transfusion reaction, initial encounter
- T80.319AABO incompatibility with hemolytic transfusion reaction, unspecified, initial encounter
- T80.39XAOther ABO incompatibility reaction due to transfusion of blood or blood products, initial encounter
- T80.40XARh incompatibility reaction due to transfusion of blood or blood products, unspecified, initial encounter
- T80.410ARh incompatibility with acute hemolytic transfusion reaction, initial encounter
- T80.411ARh incompatibility with delayed hemolytic transfusion reaction, initial encounter
- T80.419ARh incompatibility with hemolytic transfusion reaction, unspecified, initial encounter
- T80.49XAOther Rh incompatibility reaction due to transfusion of blood or blood products, initial encounter
- T80.89XAOther complications following infusion, transfusion and therapeutic injection, initial encounter
- T80.910AAcute hemolytic transfusion reaction, unspecified incompatibility, initial encounter
- T80.911ADelayed hemolytic transfusion reaction, unspecified incompatibility, initial encounter
- T80.919AHemolytic transfusion reaction, unspecified incompatibility, unspecified as acute or delayed, initial encounter
- T80.92XAUnspecified transfusion reaction, initial encounter
- T80.A0XANon-ABO incompatibility reaction due to transfusion of blood or blood products, unspecified, initial encounter
- T80.A10ANon-ABO incompatibility with acute hemolytic transfusion reaction, initial encounter
- T80.A11ANon-ABO incompatibility with delayed hemolytic transfusion reaction, initial encounter
- T80.A19ANon-ABO incompatibility with hemolytic transfusion reaction, unspecified, initial encounter
- T80.A9XAOther non-ABO incompatibility reaction due to transfusion of blood or blood products, initial encounter
Common questions about DRG 812
What is the relative weight of DRG 812?
- 0.9234 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 812?
- The geometric mean length of stay is 2.8 days; the arithmetic mean is 3.6 days.
Is DRG 812 medical or surgical?
- DRG 812 is a medical DRG.