MS-DRG v44.0 · MDC 11: Diseases and Disorders of the Kidney and Urinary Tract
661 — Kidney and Ureter Procedures for Non-Neoplasm without CC/MCC
- Relative weight
- 1.0441
- Geometric mean LOS
- 1.7 days
- Arithmetic mean LOS
- 2 days
- Type
- Surgical
About MS-DRG 661
MS-DRG 661, Kidney and Ureter Procedures for Non-Neoplasm without CC/MCC, is a surgical DRG in MDC 11 (Diseases and Disorders of the Kidney and Urinary Tract) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.0441, so Medicare's base payment for this DRG is about 1.04 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 1.7 days and the arithmetic mean is 2 days.
It belongs to a 3-level severity family: DRG 659 (with MCC, weight 2.4399), DRG 660 (with CC, weight 1.302) and DRG 661 (without CC/MCC, weight 1.0441). The highest-severity level carries 2.3 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.
ICD-10-CM codes that group to DRG 661 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 661
What is the relative weight of DRG 661?
- 1.0441 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 661?
- The geometric mean length of stay is 1.7 days; the arithmetic mean is 2 days.
Is DRG 661 medical or surgical?
- DRG 661 is a surgical DRG.