It’s a scenario that makes every private practice owner’s stomach drop. You pull your weekly remittance advice, expecting a healthy reimbursement for a complex patient session where you billed multiple units or multiple distinct codes. Instead, the payment that hits your account is a fraction of what you calculated. Your first instinct? Call it an underpayment, blame a payer glitch, and gear up for a timely filing appeal. But before you spend hours on hold or drafting appeal