Maryal Concepcion, MD FAAFP
Dr. Concepcion is a board-certified rural family physician dedicated to serving patients in Northern California since 2012 and Calaveras County since 2015. Passionate about community-focused medicine, she provides comprehensive care for patients of all ages, from infants and expectant mothers to children and adults, including in-office procedures.
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After years as an employed physician, Dr. Concepcion chose to reclaim medical decision-making—prioritizing direct doctor-patient relationships over the constraints of insurance-driven care. Since 2020, she has been a vocal advocate for Direct Primary Care (DPC), hosting My DPC Story, a podcast that highlights physicians practicing under the DPC model.
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A national advocate for independent physician practice, Dr. Concepcion actively engages in healthcare policy discussions, speaking on Capitol Hill and at national conferences. She is also deeply committed to mentoring the next generation of medical professionals, guiding pre-med students, medical students, residents, and fellow physicians on their journeys in medicine.
Jeremiah Fillo, MD FAAFP
Dr. Fillo is a board-certified rural family physician who has been caring for patients in Northern California since 2012 and Calaveras County since 2015. Growing up in the close-knit community of Sierra City, CA, he developed a deep appreciation for rural life and knew early on that he wanted to practice medicine in a similar setting after residency.
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As a Direct Primary Care (DPC) physician, Dr. Fillo values the freedom to provide patient-centered care while also embracing his personal passions. A lifelong soccer enthusiast, he has been able to dedicate time to coaching in the local soccer league—an experience made even more rewarding when his very first team won their age group championship! Through both medicine and mentorship, he remains committed to strengthening the communities he serves.
Megan Mathews, RN
Megan is a Registered Nurse and is a native of Columbus, Indiana. After graduating from nursing school, Megan began work at a pediatric practice in Columbus where she worked for 21 years. While there she cared for patients from birth to college and enjoyed getting to know her patients and their families on a personal level. She left pediatrics to work in care-coordination for the elderly before joining the Direct Primary Care movement in October of 2021.
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Megan and her husband Zach have been married for 24 years. They have a young adult son and a teenage daughter. Megan is committed to providing exceptional care for each patient she comes into contact with. She is known for being dedicated to solving problems for her patients, be they medical or logistical in nature. She has loved getting to know the patients of Big Trees MD. Megan has been a great asset to our practice alongside Dr. C and Dr. Fillo in providing high-quality care through the Direct Primary Care model.
Outside of work you are likely to find Megan at Target, at a soccer game, enjoying the view from her back porch, or running errands for her family’s farm.
Veniper "Maro" Realon-Pamplona, RN
Maro is a dedicated Registered Nurse and certified healthcare virtual assistant with over 12 years of experience in hospital settings, primarily in emergency care. Her deep commitment to patient advocacy and wellness led her to transition into Direct Primary Care (DPC) virtual assistance, a role she has passionately embraced for the past three years. This shift has allowed her to maintain her dedication to patient care while also prioritizing time with her family, young son, and beloved dogs.
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Maro’s passion for healthcare is deeply personal—she has witnessed firsthand the challenges of managing chronic conditions such as diabetes and thyroid disorders, as multiple members of her family have been affected by Type 1 and Type 2 diabetes, as well as thyroid disease. This experience fuels her dedication to supporting both patients and physicians in delivering high-quality, personalized care.
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Outside of work, Maro enjoys unwinding with family and friends, whether it’s watching movies, sharing conversations, or simply spending quality time together. She takes great pride in her role as a patient advocate and is honored to contribute to a healthcare model that prioritizes meaningful doctor-patient relationships.
Insurance these days does not guarantee healthcare nor access to care when it is needed.
Big Trees MD is a Direct Primary Care clinic where our mission is simple:
we are here to provide the personalized healthcare that everyone deserves.
Our board-certified rural family physicians have the skills and resources to take care of your health needs.
Through Direct Primary Care, they have the time needed to address your health concerns appropriately. Our physicians strive to be inclusive of all human beings and pet children too.
As a patient at Big Trees MD, you pay your doctor directly just like you pay a gym membership. Go beyond the limitations of the insurance-driven world and pay for care directly; insurance does not dictate how we provide care.
Learn more about the practice today to see how we can help you get the care you deserve.
