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 over five thousand Virginians gain access to the benefits of medical cannabis.

Dr. Nicholas Marsh - Medical Marijuana Specialist

Our Founder, Dr. Nicholas Marsh, is a seasoned board-certified anesthesiologist with an impressive 36-year career. From Chairman of Anesthesia to chair of numerous medical committees, including Clinical Quality, Pharmacy and Therapeutics, and Medical Ethics, he is recognized as a leader and visionary. More recently, 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, a therapy he truly believes in. Combining his clinical experience and compassion with cutting-edge technology, he guides patients through the process of certification. 

Recognized by as an outstanding medical provider, Dr. Marsh strives to ensure 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 advanced degrees in Mental Health Counseling, Nursing, and Psychology. Mark has extensive 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 highly respected 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 physical and mental health. Dr. Marsh brings a wide breadth of knowledge and experience, and is committed to patient-centered care. His astute understanding of the therapeutic potential of medical marijuana in managing various conditions positions him as a sought-after expert in the field. Working hand-in-hand with Dr. Marsh is Mark Parker PMHNP-BC, a seasoned Mental Health Nurse Practitioner. 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. Together, with their expertise in pain management and psychiatric care, the team 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 shining example of exceptional care in the realm of telehealth and 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. Under their leadership, 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 numerous prominent medical cannabis organizations. They keep up-to-date with the latest developments and scientific information 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.