MS-DRG v44.0 · MDC 18: Infectious and Parasitic Diseases, Systemic or Unspecified Sites
864 — Fever and Inflammatory Conditions
- Relative weight
- 0.8551
- Geometric mean LOS
- 2.5 days
- Arithmetic mean LOS
- 3.2 days
- Type
- Medical
About MS-DRG 864
MS-DRG 864, Fever and Inflammatory Conditions, is a medical DRG in MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 0.8551, so Medicare's base payment for this DRG is about 0.86 times the average inpatient case (below average), before hospital-specific adjustments. The geometric mean length of stay is 2.5 days and the arithmetic mean is 3.2 days.
8 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 864 (8)
Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- R50.2Drug induced fever
- R50.81Fever presenting with conditions classified elsewhere
- R50.82Postprocedural fever
- R50.83Postvaccination fever
- R50.84Febrile nonhemolytic transfusion reaction
- R50.9Fever, unspecified
- R65.10Systemic inflammatory response syndrome (SIRS) of non-infectious origin without acute organ dysfunction
- R65.11Systemic inflammatory response syndrome (SIRS) of non-infectious origin with acute organ dysfunction
Common questions about DRG 864
What is the relative weight of DRG 864?
- 0.8551 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 864?
- The geometric mean length of stay is 2.5 days; the arithmetic mean is 3.2 days.
Is DRG 864 medical or surgical?
- DRG 864 is a medical DRG.