Dr. Marci Nelson Joins Ms.Medicine, Opening Trillium Concierge Medicine in Edmonds, WA
Last Updated: July 2026
Dr. Marci Nelson has practiced family medicine in the Edmonds community for nearly 25 years. She has delivered hundreds of babies, watched those children grow up, and in some cases begun caring for the families they've started. She knows what it looks like when a physician has enough time to actually practice medicine — and she knows what it looks like when the system squeezes that time to nothing. For the better part of several years, she has been living the second condition and building toward the first.
This Fall 2026, that changes. Dr. Nelson is opening Trillium Concierge Medicine in the Edmonds/Shoreline area as an affiliate of the Ms.Medicine network, co-founding the practice with Dr. Jillene Casey, a longtime colleague whose clinical focus is distinct and complementary. Together they are building something the North Seattle corridor does not currently have: a physician-led concierge primary care practice with a serious commitment to women's health across the adult lifespan.
A Career Built Around Knowing Her Patients
Dr. Nelson grew up around medicine — her father was a veterinarian, and the science of bodies and systems was part of her early life. The model for how she wanted to practice came later, in her twenties, when she found herself under the care of a family physician named Dr. Nattiv who did something too few physicians do: she listened, connected, and partnered with her patients toward shared goals. Shadowing her made clear what kind of doctor Dr. Nelson wanted to become.
Dr. Nelson earned her undergraduate degree from UCLA in political science and international relations, completed her pre-medical studies at Bennington College, and earned her medical degree from UC San Diego. She trained in family medicine at Swedish in Seattle and has practiced in this community ever since.
She is board certified in family medicine and holds the Menopause Society Certified Practitioner (MSCP) designation — a credential reflecting specific, examined expertise in menopause care, and one held by relatively few physicians in this region.
A Medical Home for the Whole Family, Across the Whole Life
Dr. Nelson chose family medicine because it let her do it all: women's health, obstetrics, pediatrics, orthopedics, dermatology, mental health, geriatric care. She has never wanted to narrow her scope because these are all part of our medical lifespan. Over 25 years, that breadth has produced exactly the kind of practice the word implies: patients who came to her as newborns are now adults. Patients whose children she delivered are now grandparents. She has been present for marriages, births, diagnoses, recoveries, and losses. A handful of families have trusted her with three and four generations.
At Trillium, that continuity is built into the structure. The practice takes patients from birth through older age with no age or gender restrictions — meaning a family can have one physician who knows all of them, understands how health runs in their particular history, and has the time to act on that understanding. Dr. Nelson describes this as the deepest privilege of her career: being invited into the important moments of a patient's life over years and decades. The concierge model finally gives her the conditions to do it without compromise.
For families in the Edmonds/Shoreline area, that means pediatric and adult care under one roof. Preventive care, developmental guidance, sports physicals, and sick visits alongside adult primary care, women's health, menopause transition, and chronic disease management — and the same physician who sees a child through adolescence can remain that patient's doctor into adulthood.
A Focus That Grew From Both Sides of the Exam Table
Over the last five years, Dr. Nelson's clinical focus has deepened significantly around perimenopause and menopause care. Some of that came from watching the pattern in her own practice: patients in the midlife transition arriving with symptoms that had been dismissed, normalized, or undertreated by providers who received little formal training in the field. Some of it came from her own experience navigating peri and postmenopausal health challenges. She has been on both sides of this conversation, and it shows in her empathy.
That work has extended beyond the clinic. For several years, Dr. Nelson has run a menopause education and coaching program called Comfort & Confidence in Menopause, helping patients outside her practice navigate the information and misinformation that surrounds this stage of life. That program is now transitioning into Trillium, where the clinical and the educational aspects live within the same patient relationship.
Why She Built Trillium
Corporate medicine made the decision easier than it might have been. The steady pressure to see more patients in less time, to hit billing targets and appointment quotas, left less and less room for the kind of care she had spent her career trying to deliver. The concierge model is a structural fit for a practice philosophy she has held for 25 years.
At Trillium, she carries a much smaller panel of patients. Appointments are long enough to cover what actually needs to be covered. Patients have same-day or next-day access and can reach her directly between visits. She can review a full history before a patient walks in the door, ask about what is happening in their life, and build the longitudinal understanding that makes diagnosis and treatment accurate rather than reactive.
She has described knowing a patient within the context of their family and relationships as one of the most clinically useful tools a physician can have. Trillium finally gives her the conditions to do it consistently.
Trillium in the Edmonds Community
Dr. Nelson and her husband have raised their two sons in the Edmonds community, and she and her family are strongly committed to this community. Outside of the clinic, she enjoys mountain biking, backpacking in the beautiful PNW, skiing in winter, travel, gardening - and she maintains a serious personal fitness practice that directly informs how she talks with patients about building active, sustainable lives. She has been part of this community for decades and is building her practice here because it is where she belongs.
Trillium Concierge Medicine's office is located on the Edmonds/Shoreline border, easily accessible to patients throughout the North Seattle corridor. The practice opens this Fall 2026.
For patients searching for Dr. Nelson, or for anyone in the Edmonds area looking for a primary care physician who has the time to actually know them and their family, more information about Trillium and membership is available at msmedicine.com/seattle.
To learn more about Dr. Nelson's co-founder and Trillium's fourth trimester and breastfeeding medicine specialist, read Dr. Jillene Casey's announcement here.
