MS-DRG 815: RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH CC
MS-DRG 815 is reticuloendothelial and immunity disorders with cc, in MDC 16 (a medical DRG), at the with-CC (complication or comorbidity) level. Its FY2027 relative weight is 1.0444, so a case here pays more than the average Medicare inpatient stay (weight 1.0), with a geometric mean length of stay of 3.00 days. 137 ICD-10-CM principal diagnoses group into MS-DRGs 814–816 under the CMS definitions manual; the most-searched are listed below.
FY2027 payment factors
- Relative weight
- 1.0444
- Geometric mean LOS
- 3.00
- Arithmetic mean LOS
- 3.80
- Post-acute transfer
- No
Principal diagnoses that group to MS-DRGs 814–816
From the CMS MS-DRG definitions manual’s principal-diagnosis index: 137 ICD-10-CM codes route here, and the CC/MCC status of the secondary diagnoses decides which of 814–816 the case lands in. The 24 most-searched:
- R59.0Localized enlarged lymph nodes
- D72.829Elevated white blood cell count, unspecified
- D47.2Monoclonal gammopathy
- R76.89Other specified abnormal immunological findings in serum
- D75.1Secondary polycythemia
- R59.1Generalized enlarged lymph nodes
- R59.9Enlarged lymph nodes, unspecified
- D47.3Essential (hemorrhagic) thrombocythemia
- D72.819Decreased white blood cell count, unspecified
- D75.839Thrombocytosis, unspecified
- D80.1Nonfamilial hypogammaglobulinemia
- D83.9Common variable immunodeficiency, unspecified
- D84.81Immunodeficiency due to conditions classified elsewhere
- D84.9Immunodeficiency, unspecified
- D68.69Other thrombophilia
- D75.89Other specified diseases of blood and blood-forming organs
- D84.821Immunodeficiency due to drugs
- D89.89Other specified disorders involving the immune mechanism, not elsewhere classified
- R75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
- R76.0Raised antibody titer
- D68.59Other primary thrombophilia
- D72.820Lymphocytosis (symptomatic)
- D72.828Other elevated white blood cell count
- D89.9Disorder involving the immune mechanism, unspecified
113 more codes group here. Open any code above for its full hierarchy, or check a whole claim in the free DRG calculator.
The severity splits
Same base DRG, split by whether a secondary diagnosis is a CC or MCC. The last column is the weight change from MS-DRG 815.
| 814 | RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH MCC | 2.0729 | +1.0285 |
| 815 | RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITH CC | 1.0444 | |
| 816 | RETICULOENDOTHELIAL AND IMMUNITY DISORDERS WITHOUT CC/MCC | 0.7381 | -0.3063 |
All FY2027 MS-DRGs · MDC 16