TransmittalsPub. 100-20, One-Time Notification User Enhancement Change Request (UECR): Fiscal Intermediary Shared System (FISS) - Skilled Nursing Facility (SNF) Patient Driven Payment Model (PDPM) Reason Code 31849, Trans. 11649 (October 20, 2022) This document is only available to subscribers. Please log in or purchase access. Purchase Login