Medical Marijuana Cards in VA - Rethink-Rx


At ReThink-Rx, we believe in legitimate medical applications for cannabis and are committed to providing the highest quality care in an easy and affordable format.


Our providers are highly trained and experienced specialists, all registered with the Virginia Board of Health Professions to issue written certifications for medical cannabis use. Our office staff is caring and supportive.


Together, we have helped thousands of Virginians gain access to the benefits of medical cannabis.

Medical Marijuana Experts in Virginia
Dr. Nicholas Marsh - Medical Marijuana Specialist

Our Founder, Dr. Nicholas Marsh, is a seasoned board-certified anesthesiologist with an impressive 36-year career. Dr. Marsh has taken an unconventional turn in his medical journey. Embracing the evolving landscape of alternative therapies, he now dedicates himself to certifying patients for medical cannabis.

As the founder of ReThink-Rx, a groundbreaking online medical practice, Dr. Marsh combines his vast expertise with cutting-edge technology to guide individuals seeking relief through the therapeutic potential of cannabis. With his distinguished background, Dr. Marsh stands at the forefront of a medical revolution, challenging traditional norms and empowering patients to explore new horizons in healthcare.

Recognized as an outstanding medical provider by, Dr. Marsh strives to assure that each patient is cared for with dignity and kindness.

Mark Parker, PMHNP-BC, MSN

Mark Parker, PMHNP-BC, MSN is a board-certified Psychiatric Mental Health Nurse Practitioner with over 30 years of experience in healthcare. Mark holds degrees in Mental Health Counseling, Nursing, and Psychology. Mark has experience working with patients across the lifespan and specializes in Cognitive and Solution Focused Therapy.

Mark is a US Navy veteran and is a pivotal member of the ReThink-Rx clinical team.  For Mark, every patient contact is an opportunity to help someone find the relief they need. 

In the ever-evolving landscape of healthcare and cannabis legislation, ReThink-Rx emerges as a pioneering online medical practice, spearheading the path to excellence in patient care for those seeking medical marijuana certification in Virginia. Led by the dynamic team of Dr. Nicholas Marsh and Mark Parker PMHNP-BC, ReThink-Rx represents the harmonious fusion of decades of medical expertise and a compassionate approach to mental health.

Dr. Nicholas Marsh, a distinguished board-certified anesthesiologist with an impressive 36 years of experience, brings a wealth of knowledge and a commitment to patient-centered care to the forefront of ReThink-Rx. His astute understanding of the therapeutic potential of medical marijuana in managing various conditions positions him as a sought-after expert in the field. Dr. Marsh’s dedication to staying abreast of the latest research and advancements ensures that patients receive the highest level of care when seeking a Virginia medical marijuana card.

Working hand-in-hand with Dr. Marsh is Mark Parker PMHNP-BC, a seasoned Mental Health Nurse Practitioner with 30 years of healthcare experience. Mark’s compassionate nature and deep understanding of mental health intricacies make him a vital asset in the ReThink-Rx team. With a focus on mental wellness, Mark provides comprehensive assessments and personalized treatment plans to patients exploring the benefits of medical marijuana for conditions such as anxiety, depression, and PTSD. His expertise in psychiatric care ensures that patients receive the tailored support they need throughout their certification process.

At ReThink-Rx, the patient experience is paramount. Every step of the journey, from the initial consultation to ongoing care, is meticulously designed to prioritize comfort, convenience, and confidentiality. Through the user-friendly online platform, patients can seamlessly connect with our medical providers, allowing for virtual consultations and secure communication. The streamlined process ensures that patients can obtain their Virginia medical marijuana card with ease, eliminating the barriers that often accompany traditional medical practices.

ReThink-Rx stands as a beacon of exceptional care in the realm of medical marijuana certification in Virginia. Dr. Nicholas Marsh and Mark Parker PMHNP-BC’s unwavering commitment to empowering patients and improving their quality of life shines through in every interaction. With their combined expertise and compassionate approach, ReThink-Rx is redefining the landscape of online medical practices, providing a seamless and patient-centric experience for those seeking the benefits of medical marijuana


ReThink-Rx medical providers are fully licensed, board-certified in their specialties and maintain active membership in various prominent medical cannabis organizations. They keep up-to-date with the latest developments and scientific information about cannabis therapy and will explain things in terms you can understand. 

We consider it a privilege to be part of your care and look forward to helping you get the relief you deserve.