MS-DRG v44.0 · MDC 07: Diseases and Disorders of the Hepatobiliary System and Pancreas
421 — Hepatobiliary Diagnostic Procedures with CC
- Relative weight
- 1.7121
- Geometric mean LOS
- 3.3 days
- Arithmetic mean LOS
- 4.3 days
- Type
- Surgical
About MS-DRG 421
MS-DRG 421, Hepatobiliary Diagnostic Procedures with CC, is a surgical DRG in MDC 07 (Diseases and Disorders of the Hepatobiliary System and Pancreas) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.
Its FY2027 relative weight is 1.7121, so Medicare's base payment for this DRG is about 1.71 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 3.3 days and the arithmetic mean is 4.3 days.
It belongs to a 3-level severity family: DRG 420 (with MCC, weight 3.0664), DRG 421 (with CC, weight 1.7121) and DRG 422 (without CC/MCC, weight 1.4255). The highest-severity level carries 2.2 times the weight of the lowest, which is why documenting CC and MCC conditions matters.
ICD-10-CM codes that group to DRG 421 (0)
This DRG is assigned by procedure, not by a diagnosis list.
Common questions about DRG 421
What is the relative weight of DRG 421?
- 1.7121 for FY2027 (MS-DRG v44.0), from the IPPS final rule Table 5.
What is the average length of stay for DRG 421?
- The geometric mean length of stay is 3.3 days; the arithmetic mean is 4.3 days.
Is DRG 421 medical or surgical?
- DRG 421 is a surgical DRG.