Dr. Jill Casey Joins Ms.Medicine, Co-Founding Trillium Concierge Medicine in Edmonds, WA
Last Updated: July 2026
Dr. Jill Casey has lived and practiced medicine in the Edmonds community long enough that she runs into her patients at the farmer's market, at the gym, and on the sidelines of her daughters' soccer games. She chose family medicine because it meant staying with people across years and life stages, and she chose to stay in this community because it is where her own life is rooted. When she and Dr. Marci Nelson decided to build something new, there was never a question of where.
This fall, Dr. Casey is opening Trillium Concierge Medicine in the Edmonds area alongside Dr. Nelson, joining the Ms.Medicine network as a co-founding affiliate physician. Trillium is built around three clinical pillars that together describe a woman's health across her adult life: primary care, evidence-based menopause and hormonal care, and fourth trimester postpartum medicine. Dr. Casey's particular depth lives in that third lane, though her practice reaches across the full lifespan, from infants to end-of-life care, with no age restrictions and no patient population she turns away. And men, don’t worry--Dr. Casey will continue providing care to you!
Patients searching for Dr. Casey under either name, Jill Casey or Jillene Casey, will find her here and at msmedicine.com/seattle.
A Physician Who Chose to Stay Curious
Dr. Casey has wanted to practice medicine since childhood, drawn from an early age to science and the mechanics of the human body. Her background as an athlete and coach informs how she approaches youth sports health specifically, including injury prevention, conditioning, and return-to-play guidance that goes beyond the standard physical form. She earned her biology degree from the University of Portland and her medical degree from the University of Washington, then completed her residency in family medicine at Swedish First Hill.
She chose family medicine for a specific reason: it was the one specialty that would not require her to stop learning. Pediatrics, psychiatry, obstetrics, primary care, surgery, every rotation as a medical student deepened her interest rather than narrowing it, and family medicine was the only path that let her keep all of it. Seventeen years later, she still describes herself as a perpetual learner who reads about medicine in her free time, follows updates in exercise science, and stays genuinely engaged with diagnostic puzzles in a way that most people do not sustain for two decades.
Care for the Whole Family, From the Very Beginning
Once a family physician, always a family physician. Dr. Casey still uses that phrase, and it captures something real about how she practices. Seventeen years in, her clinical interest in pediatric and whole-family care has not faded into a subspecialty. She sees infants, children, adolescents, adults, and patients in their final years. She is as comfortable doing a well-child visit as she is managing a complex chronic condition in a 60-year-old.
At Trillium, that scope is a feature, not a side offering. A family can bring their newborn, their teenager, and themselves to the same practice, with physicians who know the full household context. Dr. Casey's pediatric preventive care includes well-child visits, developmental screenings, sports physicals, and vaccine management. Her background in athletic training informs how she approaches youth sports health specifically, including injury prevention, conditioning, and return-to-play guidance that goes beyond the standard physical form.
She has raised her own two daughters in this community and practiced here through their entire childhoods. She understands what families in this area need from a physician because she is living inside the same community her patients are.
From Obstetrics to Breastfeeding Medicine
After more than ten years practicing family medicine with obstetrics, Dr. Casey made a deliberate transition. She stopped delivering babies and pursued certification as an International Board Certified Lactation Consultant (IBCLC), becoming one of a small number of physicians in this region who holds that credential. The decision came directly from her own experience as a new mother navigating breastfeeding challenges without adequate medical support. She knew the gap was real because she had lived in it, and she had the clinical background to fill it in a way that non-physician lactation consultants cannot.
At Trillium, her breastfeeding medicine practice is comprehensive. She can begin working with patients prenatally, support them through the fourth trimester and the return to work, address pumping and weaning, and assist with induction of lactation. She is also trained in tongue-tie diagnosis and treatment, including scissor frenotomy, a procedure that makes a meaningful difference for families struggling with breastfeeding and one that very few primary care physicians in this area offer.
That clinical scope connects to a larger vision for postpartum care. The medical fourth trimester, the hormonal, physical, and emotional transition that follows birth, is largely unaddressed in the current healthcare system. The standard six-week OB visit does not cover it. Dr. Casey's practice is built around filling that gap and keeping the patient inside a primary care relationship that continues long after the postpartum period ends.
Why Trillium, Why Now
Dr. Casey's answer to why she left a large health system is uncomplicated. The system changed around her in ways that made good medicine harder to practice. More administrative pressure, more patients per hour, longer waits for appointments, fragmented care between urgent care and primary care, and insurance companies increasingly dictating clinical decisions. She was looking for a different structure, one that put the patient relationship back at the center.
The concierge model gives her that structure. At Trillium, she carries a small panel, which means appointments are long enough to cover what actually needs to be covered. Patients can reach her the same day or the next. They communicate with her directly between visits. She knows their families, their histories, and the context of their lives, which is the foundation her care philosophy is built on.
She also describes the two-physician structure at Trillium as something patients benefit from in a specific and practical way. In a solo concierge practice, coverage gaps happen. At Trillium, Dr. Casey and Dr. Nelson have practiced alongside each other for years and know each other's clinical judgment well. When one physician is unavailable, the other can step in with genuine familiarity, not as a stranger covering a chart.
A Practice That Belongs Here
Dr. Casey is raising her two daughters in this community, coaching their volleyball teams and showing up to their soccer games. She gardens, weightlifts, hikes, and snowboards. She cuts flowers from her own garden and brings them to friends and neighbors. She is here because this is where she lives, and Trillium is the practice she is building for the community she is part of.
Her clinical motto is listening first, caring always, and it has been how she has practiced for seventeen years.
Trillium Concierge Medicine opens this fall on the Edmonds/Shoreline border, accessible to patients throughout the north Seattle corridor. More information about the practice and membership is available at msmedicine.com/seattle.
To learn more about Dr. Casey's co-founder and Trillium's women's midlife health and menopause specialist, read Dr. Marci Nelson's announcement here.
