Each month, contact every contractor and payer on the roster and confirm, for each Medrina entity: (a) whether any correspondence has been issued to us in the period, including Targeted Probe and Educate (TPE) notices, Additional Documentation Requests (ADRs), audit or medical review letters, overpayment or demand letters, appeal decisions, and revalidation or enrollment notices; (b) the status and due date of any open request; and (c) the correspondence address they have on file for us. Maintain a call roster of every MAC jurisdiction in which Medrina entities are enrolled, plus the relevant UPICs, state Medicaid agencies, and major commercial payers, including phone numbers, provider portal access where applicable, and the identifiers (PTANs, NPIs, TINs) needed to verify on each call.