Denominator	Patients 18 years of age and older who were diagnosed with acute myocardial infarction (AMI), coronary artery bypass graft (CABG) or percutaneous coronary interventions (PCI) in 24 to 12 months prior, OR who had an active diagnosis of ischemic vascular disease (IVD) in 12 months. (MSSP 2018)
Numerator	Received an influenza immunization OR who reported previous receipt of an influenza immunization between August 1, 2018 to March 31, 2019. (MSSP 2019)
Exclusion/Exception	• Documentation of medical reason(s) for not receiving influenza immunization (eg, patient allergy, other medical reasons). • Documentation of patient reason(s) for not receiving influenza immunization (eg, patient declined, other patient reasons). • Documentation of system reason(s) for not receiving influenza immunization (eg, vaccine not available, other system reasons). • Patients with hospice care in 12 months.