Via the CMS.gov MDS 3.0 Technical Information webpage:
February 05, 2019
A new version (V3.00.0) of the MDS 3.0 Data Specifications was posted. This version is scheduled to become effective October 1, 2019. Note that there are many significant changes, including the removal of eight item sets (NS, NSD, NO, NOD, SS, SSD, SO, SOD), the addition of two new item sets (IPA and OSA), and item additions in Sections A, GG, I, J, O and Z. These specs accommodate the utilization of the PDPM grouper, which also begins on October 1, 2019.
In addition, a new version (V1.04.0) of the MDS 3.0 CAT Specifications was posted. This version is also scheduled to become effective October 1, 2019. The specification for CAT 12 (Nutritional Status) has been updated in accordance with the changes in V3.00.0 of the MDS 3.0 Data Specifications.