MS-DRG v44.0 · MDC PRE: Pre-MDC
989 — Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis without CC/MCC
- Relative weight
- 1.1044
- Geometric mean LOS
- 2.1 days
- Arithmetic mean LOS
- 2.7 days
- Type
- Surgical
About MS-DRG 989
MS-DRG 989, Non-Extensive O.R. Procedures Unrelated to Principal Diagnosis without CC/MCC, is a surgical DRG in Pre-MDC under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.1044, so Medicare's base payment for this DRG is about 1.10 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 2.1 days and the arithmetic mean is 2.7 days.
It belongs to a 3-level severity family: DRG 987 (with MCC, weight 3.3515), DRG 988 (with CC, weight 1.6477) and DRG 989 (without CC/MCC, weight 1.1044). The highest-severity level carries 3.0 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 989 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 989
What is the relative weight of DRG 989?
- 1.1044 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 989?
- The geometric mean length of stay is 2.1 days; the arithmetic mean is 2.7 days.
Is DRG 989 medical or surgical?
- DRG 989 is a surgical DRG.