MS-DRG v44.0 · MDC 18: Infectious and Parasitic Diseases, Systemic or Unspecified Sites
857 — Postoperative or Post-Traumatic Infections with O.R. Procedures with CC
- Relative weight
- 2.1678
- Geometric mean LOS
- 5.3 days
- Arithmetic mean LOS
- 6.6 days
- Type
- Surgical
About MS-DRG 857
MS-DRG 857, Postoperative or Post-Traumatic Infections with O.R. Procedures with CC, is a surgical 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 2.1678, so Medicare's base payment for this DRG is about 2.17 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 5.3 days and the arithmetic mean is 6.6 days.
It belongs to a 3-level severity family: DRG 856 (with MCC, weight 4.4826), DRG 857 (with CC, weight 2.1678) and DRG 858 (without CC/MCC, weight 1.4036). The highest-severity level carries 3.2 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
It is subject to Medicare's post-acute care transfer policy, so payment can be reduced when a patient with a shorter-than-average stay is discharged to a skilled nursing facility, home health or another post-acute setting.
11 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 857 (11)
Chapter 11: Diseases of the digestive system
Chapter 14: Diseases of the genitourinary system
Chapter 19: Injury, poisoning and certain other consequences of external causes
- T80.22XAAcute infection following transfusion, infusion, or injection of blood and blood products, initial encounter
- T80.29XAInfection following other infusion, transfusion and therapeutic injection, initial encounter
- T81.40XAInfection following a procedure, unspecified, initial encounter
- T81.41XAInfection following a procedure, superficial incisional surgical site, initial encounter
- T81.42XAInfection following a procedure, deep incisional surgical site, initial encounter
- T81.43XAInfection following a procedure, organ and space surgical site, initial encounter
- T81.44XASepsis following a procedure, initial encounter
- T81.49XAInfection following a procedure, other surgical site, initial encounter
- T88.0XXAInfection following immunization, initial encounter
Common questions about DRG 857
What is the relative weight of DRG 857?
- 2.1678 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 857?
- The geometric mean length of stay is 5.3 days; the arithmetic mean is 6.6 days.
Is DRG 857 medical or surgical?
- DRG 857 is a surgical DRG.