Significance of angiographic stenosis (may be quantitative or qualitative) on coronary angiography for treated lesion. 2. Appropriate Indication for Elective PCIz Percentage of patients aged 18 years for whom elective PCI is performed in a native coronary artery who have an appropriate indication for the procedure that suggests its overall benefits outweigh its risks. 3. Assessment of Candidacy for Dual-Antiplatelet Therapyy Percentage of patients aged 18 years for whom PCI is performed who have documentation in the medical record that an assessment of candidacy for initiation and duration of dual-antiplatelet therapy was performed prior to the procedure. 4. Use of Embolic Protection Devices in the Treatment of Saphenous Vein Bypass Graft Diseasez Percentage of patients aged 18 years for whom saphenous vein graft PCI is performed who received an embolic protection device during the procedure. 5. Documentation of Preprocedural Glomerular Filtration Rate and Contrast Dose Used During the Procedurez Percentage of patients aged 18 years for whom PCI is performed who have both preprocedural estimated glomerular filtration rate or an indication that the patient is on dialysis AND the administered contrast dose documented in the catheterization report or procedure notes. 6. Radiation Dose Documentationz Percentage of patients aged 18 years for whom PCI is performed who have the administered radiation dose documented in the catheterization report or procedure notes. 7. Postprocedural Optimal Medical Therapy Compositey Percentage of patients aged 18 years for whom PCI is performed who are prescribed optimal medical therapy at discharge. 8. Cardiac Rehabilitation Patient Referraly Percentage of patients aged 18 years for whom PCI is performed who have been referred to an outpatient cardiac rehabilitation / secondary prevention program. 9. Regional or National PCI Registry Participationy Participation in a national or multisystem geographic regional PCI registry that provides regular performance reports based on benchmarked data. 10. 