For Healthcare Professionals

As one of the only physician-led medical cannabis companies in the United States, Vireo Health uniquely values collaboration with physicians and other healthcare professionals. Given the fact that the vast majority of healthcare professionals have no experience with cannabis in a medical setting we have chosen to dedicate a significant amount of resources to education. Our medical team regularly meets with healthcare professionals to increase their awareness about the benefits of medical-cannabis and to offer themselves as expert resources that can be relied upon for future consultation. If you are a healthcare professional interested in exploring the possibility of recommending medical cannabis to your patients with the appropriate qualifying conditions and have some questions you would like to discuss with one of our experts, please feel free to contact us for a consultation.

We collaborate with healthcare professionals to provide quality care to patients.

Our medical team regularly meets with healthcare professionals to increase their awareness about the benefits of medical-cannabis and to offer themselves as expert resources that can be relied upon for future consultation.

If you are a healthcare professional interested in exploring the possibility of recommending medical cannabis to your patients with the appropriate qualifying conditions and have some questions you would like to discuss with one of our experts, please feel free to contact us for a consultation.

Quick Question

Interested in how medical cannabis can impact your patients? Contact our medical team for a quick reply.

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Schedule A Consultation

Contact us today to schedule a consultation, in person or by phone, with one of our medical cannabis experts.

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Download the FREDOM Protocol

This first-of-its-kind draft protocol is being called FREDOM (Flexible Reduction and Expedited Discontinuation of Opioid Medications) and has been developed to offer a potential path for physicians to help patients struggling with chronic or intractable pain replace opioids with medical cannabis.

Download the paper here.

Meet Our Medical Team

Kyle Kingsley, M.D.

Chief Executive Officer & CHAIRMAN OF THE BOARD

Kyle Kingsley, M.D, is the Founder and Chief Executive Officer of Vireo Health, a board-certified physician, serial entrepreneur, and inventor. Dr. Kingsley believes that cannabis-based products are a safer, less-addictive alternative to opioids, alcohol, and tobacco. Dr. Kingsley is focused on building the cannabis company of the future by combining the best of medicine, engineering, and science.

Dr. Kingsley leads Vireo’s physician- and scientist-led team of more than 400 employees in creating best-in-class cannabis products and offering unmatched customer experience. Under Dr. Kingsley’s leadership, Vireo has experienced exponential growth. What began as a company operating exclusively in the state of Minnesota in 2014 has now emerged as one of the country’s leading multi-state operators, with licenses in ten states and Puerto Rico. In March 2019, Dr. Kingsley took the company public, and Vireo Health is now listed on Canadian Securities Exchange, under the stock symbol “VREO”.

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Dr. Kingsley received a Bachelor of Science degree in Biochemistry and a Bachelor of Arts degree in German from University of Minnesota in Duluth and received a Doctor of Medicine degree from the University of Minnesota, Twin Cities. Dr. Kingsley is co-author of the book Medical Cannabis Primer for Healthcare Providers, written to elucidate objective medical cannabis knowledge in the medical community. Using comprehensive, state-wide programs that integrate healthcare providers, Dr. Kingsley’s solitary goal is to make Vireo Health the safest, most reliable, and compassionate choice for the patients in all of the States in which the company operates.

Stephen Dahmer, M.D.


Dr. Stephen M. Dahmer is the Chief Medical Officer at Vireo Health and a board-certified family doctor whose passion for health and healing has taken him around the globe. A fellow of the Arizona Center for Integrative Medicine, for over a decade he has studied the relationships between plants and people, working closely with diverse cultures and documenting their uses of plants.

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Aspiring to understand ethnomedical systems, as well as the plants and traditional beliefs that support them, Dr. Dahmer has worked in divergent settings including Umbanda terreiros in the heart of Brazil’s second largest slum, Maori clinics in New Zealand, native healers on the Palauan Islands, and as a hospitalist to the Navajo (Dine) Tribe in Chinle, Arizona. Prior to starting full time work for Vireo Health of New York, Dr. Dahmer was most recently Assistant Clinical Professor of Family Medicine and Community Health at the Icahn School of Medicine at Mount Sinai where he passionately provided innovative primary care for over seven years in New York City where he lives and resides with his family.

Gary Starr, M.D.

Senior Vice President of Global Affairs & Chief Quality Officer

Gary Starr, M.D., is the Senior Vice President of Global Affairs & Chief Quality Officer for Vireo Health. Dr. Starr is board-certified emergency medicine physician who practices in Minnesota. In his role at Vireo Health’s international office in Montreal, Canada, Dr. Starr brings a wealth of knowledge as a result of his many years of experience at the intersection of medicine, business, manufacturing quality and politics. Dr. Starr currently serves in leadership roles in the American College of Emergency Physicians (ACEP), the Society of Cannabis Clinicians (SCC), and the Foundation of Cannabis Unified Standards (FOCUS). He also co-founded and has held multiple executive roles for other vertically integrated licensed medical cannabis manufacturers and consulted for multiple U.S. and Canadian companies engaged in cannabis-related bio-pharmaceutical and consumer product development. A veteran of the United States Air Force, Dr. Starr graduated from the University of Cincinnati College of Medicine and completed his residency in emergency medicine at the University of Chicago and his residency in family medicine at Saint Louis University.

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Joseph Westwater, M.D.

Chief Executive Officer of Minnesota Medical Solutions

Joseph (Jay) Westwater, M.D., J.D., is the Chief Executive Officer of Minnesota Medical Solutions, a subsidiary of Vireo Health. Dr. Westwater is a board-certified emergency department physician who has practiced in Minnesota for almost thirty years. A graduate of the University of Virginia School of Medicine and the Saint Thomas Physician Leadership College of Business, Dr. Westwater completed his residency at Hennepin County Medical Center and has held numerous medical staff and professional group leadership positions over the years. Prior to his career in medicine, Dr. Westwater received a law degree from the Georgetown University Law Center and practiced tax law and specialized in legislative affairs in Washington, D.C.

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Eric Greenbaum, JD

chief science officer

Eric Greenbaum is the Chief Science Officer of Vireo Health and has an impressive combination of scientific and legal expertise. Eric began his career working on stem cell and gene therapies for neurometabolic diseases. He went on to explore the role of protein folding in neurodegenerative diseases and led the team that performed the first biochemical characterization of the newly discovered E46K mutation responsible for a form of early onset Parkinson‘s Disease. After leaving academic science, Eric ran a boutique IP law firm where he crafted global patent strategies for biotech and pharmaceutical inventions. Since joining Vireo Health, Eric has been instrumental in developing our IP portfolio and driving our R&D efforts. Eric received a bachelors of science from Emory University in neuroscience; a masters of science from the University of Pennsylvania in pharmacology; and a JD from St. John’s University.

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Paloma Lehfeldt, M.D.

Director of Medical Education

Dr. Paloma Lehfeldt serves as a Medical Science and Patient Liaison for Vireo Health. Dr. Lehfeldt brings to Vireo more than ten years of experience in psychiatric research, community outreach, and teaching. She has expertise in neuroscience with a keen interest in pain management/analgesia in the endocannabinoid system. Her interest in cannabis as medicine is a direct result of working with patients and research participants unable to control chronic pain and their subsequent opioid dependence.

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At Vireo, Dr. Lehfeldt is the direct line of communication with providers and physicians and organizes outreach events, conferences and lectures for both providers and patients. She is passionate about the use of cannabis as medicine, and looks forward to advocating it's healing properties throughout her career.

Dr. Lehfeldt is a graduate of Ross University School of Medicine. She also has a Master in Biological Psychology from New York University.

Sarah Overby

Director of Medical Education

Sarah Overby has served the health care industry for more than 20 years. Her experience as a nurse extends across various disciplines including geriatrics, pediatrics, family medicine, cardiology, medical surgery and women’s health. As the Director of Medical Education for Minnesota Medical Solutions, Sarah spearheads outreach and education for healthcare professionals, patients and community groups. She is an expert in MinnMed’s operations, its products, current medical and scientific research and publications in medical cannabis. She has lectured on medical cannabis to hundreds of medical providers, while building and maintaining strong relationships. She also represents MinnMed at various conferences throughout the state. Sarah is an advocate for patients, witnessing and documenting countless inspirational and life-changing patient success stories. Sarah has also helped launch MinnMed’s very own patient support group and facilitates a patient follow-up program. Sarah was awarded the 2017 Vireo Innovative Award.

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We’ve Written The Books On Medical Cannabis. Literally.

The Medical Cannabis Primer for Healthcare Professionals, co-authored by Drs. Kingsley and Bultman, is designed for physicians and healthcare professionals interested in learning more about medical cannabis. This book is widely considered one of the most scientific, fact-based medical cannabis textbooks available today.

Available for purchase on

Cultivating Science & Weeding Out Lore: Medical Cannabis in Pediatric Neurology and Palliative Care, was edited by Dr. Bultman and authored by Marie-Helene Grzesiak. Filled with pictures, helpful tables, and at-your-fingertips information, this book is meant to be a quick yet complete pediatric medical cannabis reference guide for families and providers.

Available for purchase on

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