We are seeking a Accounting Contractor with experience in Patient Financial Services (PFS) / Revenue Cycle Management (RCM) to help supporting teams design and validate AI solutions for backend billing, denials, accounts receivable, payment reconciliation, underpayments, and self-pay workflows. Strong knowledge of CARC/RARC codes, payer contracts, fee schedules, appeal deadlines, 835/837 transactions, AR aging, COB, and write-off classification.