Patient Portal Contact (972) 823-6505 . Biography Dr. Holt understands that prevention is the key to health and fosters compassionate care by building relationships with his patients. ... Boardwalk Physical Medicine - McKinney . 8080 State Hwy 121 Suite 210 . Mckinney, Texas 75070 . Driving Directions (972) 823-6505 . Boardwalk Physical ....