Oasis Dental takes walk-ins and same-day emergencies, and it works a payer mix that includes PPO, Medicaid and Medicare Advantage. That combination produces the hardest version of the verification problem: high volume, low predictability, and plans that behave differently from one another. Verification was handled by two people at the front desk between patients, which meant it happened in whatever gaps the day allowed. On a busy day the gaps closed. Roughly 4 in 10 patients were being verified the morning of their appointment or while they were already sitting in the waiting room, and the team was starting each day with a list of unknowns rather than a schedule.