War-game a DRG validation ladder by proving each ladder step has a named owner, a measured age-out, and a reverse path before draft steps start governing every DRG claim.
DRG validation ladders fail when "validated" means a status without a decision artifact, when teams dual-count a draft step as both approved and live, and when high-risk DRG families still pin to one thin reviewer because the step inventory is incomplete. The review needs one written inventory of ladder steps, one owner who can deny a risky shortcut, and a documented consequence when a failed step ages past the deadline.
State the ladder in writing
State which DRG families the ladder covers, the effective date, which validation steps change, how versions are stored, and what happens to cases already in flight. Name the service lines that feel it first and the cash promises that depend on coherent DRG handling. If the memo mixes a DRG validation ladder with a case mix freeze and an eligibility check SLA, split them.
Write the decision you will make if the war game finds nothing new. Also write the reverse criteria: the missed step, cash gap, or payer deadline that would force a ladder rollback within a stated window.
Failure modes worth rehearsing
- A high-dollar DRG class stays soft while the aggregate validation dashboard stays green.
- Two teams claim the same step ownership and neither can force a freeze at week end.
- A restore has already left a case without a trusted DRG state.
- The primary DRG export lags beyond the planned observation window.
- An operator skips a ladder gate because a month-end cutoff is near.
For each failure mode, require detection time, cash impact, containment, and the authority to force a ladder rollback. Commands and export links belong in the runbook, not in a verbal promise that monitoring will catch it.
Run the ladder through adversarial passes
Feed Pingpong the ladder memo, the step exhibits, and seating briefs for revenue integrity, coding, claims, and finance. First pass steelmans the ladder. Later passes attack from those seats. Final pass turns surviving objections into phased step rules, mitigations, or a changed recommendation. Agreement across passes is not proof. Keep the objections that still have evidence gaps.
Pair with the revenue integrity lead seat, a case mix freeze, a coding query backlog stress test, and a denial writeback rule. More operating decisions live in the war-game decisions hub.
Ship the ladder only when approved and blocked step labels can be reproduced from stored DRG exports without a verbal override.