& Legacy Heart Center Plano Address: 6601 Preston Rd, Plano, TX 75024 Clinic hours: 8:00am - 5:00pm Monday, Wednesday, Friday; 8:00pm - 7:00pm Tuesday and Thursday. Saturday, 8:00am - 12:00pm. No call SHIFT: Variable PRN (to be discussed in a formal interview). About Us Here & we promote the well-being of all individuals, families, and communities. And is the largest not-for-profit healthcare system in Texas that empowers you to live well.