The investigators' will test two hypotheses:
Hypothesis 1 (H1): Compared to usual care, adults with heart failure who receive the I-TRANSFER-HF intervention will have fewer 30-day readmissions, ED visits, and greater days at home. The four hospital-agency pairs will all begin the study with a baseline period of no intervention and then randomly selected to start the intervention phase at different points in time. Medicare claims data from each hospital-agency pair will be used to determine outcomes, and these data will be supplemented with national claims data for external controls not in the study to test the effectiveness of the I-TRANSFER-HF intervention.
Hypothesis 2 (H2): Compared to usual care, heart failure patients who receive I-TRANSFER-HF will have a higher proportion of timely first week HHC nursing visits (within 2 days of hospital discharge, plus 2 more) and outpatient visits (within 7-days of discharge). Given the rise of telemedicine, the study will test the association between the type of outpatient visit (in-person vs. virtual), its timing, and its association with outcomes. H2 requires conducting qualitative interviews with key stakeholders across the 4 hospital-agency pairs to identify barriers and facilitators that influence I-TRANSFER-HF's implementation. The study will assess the intervention's acceptability, feasibility, fidelity, and adaptation with interviews and Medicare claims data using a multi-methods approach and guided by the updated Consolidated Framework for Implementation Research (CFIR 2.0).