818 — Other Antepartum Diagnoses with O.R. Procedures with CC

MS-DRG 818, Other Antepartum Diagnoses with O.R. Procedures with CC, is a surgical DRG in MDC 14 (Pregnancy, Childbirth and the Puerperium) under MS-DRG version 44.0, which applies to inpatient discharges from October 1, 2026 through September 30, 2027.

Its FY2027 relative weight is 1.2942, so Medicare's base payment for this DRG is about 1.29 times the average inpatient case, before hospital-specific adjustments. The geometric mean length of stay is 3 days and the arithmetic mean is 3.8 days.

It belongs to a 3-level severity family: DRG 817 (with MCC, weight 2.0534), DRG 818 (with CC, weight 1.2942) and DRG 819 (without CC/MCC, weight 0.7739). The highest-severity level carries 2.7 times the weight of the lowest, which is why documenting CC and MCC conditions matters.

1,964 ICD-10-CM diagnosis codes are part of this DRG's grouping logic; they are listed below.