About

Our Vision

We at PRA (Park Rx America) believe that nature-rich areas should be accessible to all, and incorporated into our daily routines. Spending time in and around nature is the single most important first-step to improving both human and planetary health. PRA is committed to educating healthcare professionals and the public, and to providing the tools to meet each individual's unique needs.


Our Team

Dr. Robert Zarr, MD, MPH, Founder & Medical Director

Dr. Robert Zarr, MD, MPH
Founder & Medical Director

Robert is a physician researcher and public health pediatrician based at Unity Health Care, Inc. He has provided medical attention to BIPOC and immigrant populations for more than 20 years. Robert is also a certified nature and forest therapy guide. You will often find him walking or hiking on nearby trails and spending time near his neighborhood trees.


Dr. Stacy Beller Stryer, M.D., Associate Medical Director

Dr. Stacy Beller Stryer, M.D.
Associate Medical Director

Dr. Beller Stryer is a board-certified pediatrician working for the federal government and the Maryland task force Project Green Classrooms. She previously developed health promotion/disease prevention programs for the Indian Health Service and Revolution Health, an online healthcare website. She will find any excuse to be outside hiking, biking, or camping.


Matthew Scribner, Chief Technology Officer

Matthew Scribner
Chief Technology Officer

Matthew is a DC native "full-stack" developer with knowledge in both front-end to back-end software development. He believes in coding for a cause and finding ways to make technology easy and accessible.

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