With the increase on quarters that are required to be submitted for EH eCQMs in CY2021 and forward, what is the guidance for EHs that switch EHR systems in the middle of the reporting year (between quarters or in the middle of the quarter)?

Can different vendors submit QRDA I files for the quarter, same facility?

Can different vendors submit files for different quarters,  same facility?

Some examples:

Facility uses EHR 1 during Q1/Q2 and EHR 2 for Q3/Q4. It wants to submit Q2 and Q3 data

Facility uses EHR 1 during Q1 and first half of Q2; EHR 2 for second half of Q2, Q3 and Q4. It wants to submit Q2 and Q3 data