No. Organizations may not use other data sources (e.g., supplemental or medical record data) when excluding members living long-term in an institution. The LTI flag in the Medicare Part C monthly membership file is the only source that may be used to identify this exclusion. NCQA was informed by CMS that all Medicare plans receive this file monthly and have access to this flag. NCQA plans to clarify this in the HEDIS 2018, Volume 2 Technical Update Memo, scheduled for release on October 2, 2017.
HEDIS 2018