Episodes spanning Jan. 1 get 60-day rate. You should be starting your ramp-up to the Patient-Driven Groupings Model already, experts agree. But just when do you need to plan to go live with the new model? New guidelines the Centers for Medicare & Medicaid Services reviewed in its Feb. 12 MLN Matters educational call on PDGM will tell you. Sixty-day billing and payment applies for: Thirty-day billing and payment applies for: Remember: The 30-day period applies only to billing. “Under the PDGM, recertification for home health services, updates to the comprehensive assessment, and updates to the HH plan of care will continue on a 60-day basis,” CMS said.