& Legacy Heart Center Plano Address: 6601 Preston Rd, Plano, TX 75024 Clinic hours: 8:00a - 5:00p Monday, Wednesday, Friday, 8:00am - 7:00pm Tuesday and Thursday, Saturday, 8:00am - 12:00pm. No call 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. Our Core Values are: We serve faithfully by doing what's right with a joyful heart.