CMS has released final OASIS-D1 data submission specifications ahead of Jan. 1, 2020 implementation.
The new version, V2.31.0, is effective for OASIS assessments with an M0090 (Date assessment completed) date of January 1, 2020 or later. 
Changes to this version are necessary for the transition to the Patient-Driven Groupings Model (PDGM) and include:
  • the addition of two existing items to the follow-up assessment instrument, and
  • the change of 23 items from required to optional data collection at certain time points.
Related link: Find the OASIS-D1 data submission specifications in the downloads section at the bottom of the OASIS Data Specifications webpage at