OUR PRACTIONERS
We want you to get the care that you deserve.
Everest Goldstein
Founder
M.Ed, MSN, PMHNP-BC, FMCP-M
Everest is a Board-Certified Psychiatric Nurse Practitioner also certified in Functional Medicine. She is the founder of Everest Functional Psychiatry and Wellness, one of the only Functional Psychiatry practices in Texas, as well as Evergreen Functional Collective, an integrative and educational collective. She serves as faculty for the Institute for Functional Nursing and is an internationally renowned speaker and educator. Everest is passionate about educating others on the mind-body connection and advancing conversations around mental health and holistic care.
She was born and raised in Dallas, Texas, and earned her B.A. in Psychology from Princeton University. After graduating from Princeton, she worked with Teach For America as a bilingual elementary school teacher, administrator, and curriculum developer. During this time, Everest earned her Master of Education from Southern Methodist University in Dallas, Texas.
While working in education, Everest saw firsthand the significant need for accessible mental health services in the community. This realization led her to pursue her passion for mental health care, and she went on to earn her Psychiatric Nurse Practitioner degree from Vanderbilt University. To further support her patients through a holistic lens, Everest also completed her functional medicine certification through the Institute for Functional Medicine.
Everest’s approach to care is rooted in the belief that the mind and body are deeply connected. By integrating lifestyle, nutrition, medication, and innovative technologies, she works with each patient to help them better understand their individual health, regain balance, and improve their overall wellbeing. She is passionate about reducing the stigma surrounding mental health and expanding access to care through education, advocacy, and compassionate treatment.
In her free time, Everest enjoys being outdoors at the beach or in the mountains. I love to waterski, hike, cook, travel, and spend time with friends and family.
Morgan Prejean
MPAS, PA-C, MBCE, RYT-200
Morgan is a board-certified Physician Assistant with a passion for helping people get to the root of their health concerns. With a background in both conventional and functional medicine, she takes a whole-person, personalized approach to care.
Her own health journey is what ignited her deep interest in functional medicine. After navigating complex health challenges herself, she became committed to helping others find answers and lasting healing—especially in the areas of hormones, gut health, detox, mold toxicity and nervous system support.
Morgan earned her Master’s degree from LSU Health Sciences Center and holds a 200-hour yoga teacher training, which influences her integrative perspective on health. She believes true health is not just the absence of symptoms but feeling empowered, energized, and at home in your body. She is honored to walk alongside her patients on their healing journey and create a space where they feel heard, supported, and inspired to thrive.
Michelle Shaffer
MSN, FNP
Michelle’s clinical interests include mental health, hormone optimization, metabolic health, gut health, longevity medicine, weight management, and women’s health. She enjoys partnering with patients to create personalized treatment plans that empower them to feel their best, restore energy, optimize performance, and improve overall quality of life. She believes that every patient deserves to be heard, understood, and cared for as a whole person—not just a diagnosis.
Her passion for mental health is deeply personal. Michelle lost her father to mental illness when she was just ten years old after he spent years living with schizophrenia, bipolar disorder, and depression. Watching someone she loved struggle profoundly shaped the way she views healthcare and inspired a lifelong commitment to helping others who face similar challenges. That experience taught her the importance of compassion, listening without judgment, and recognizing that every person’s story matters. It also reinforced her belief that mental health cannot be separated from physical health, hormones, nutrition, lifestyle, and the many factors that influence overall well-being.
Michelle Shaffer, MSN, FNP, is a board-certified Family Nurse Practitioner with a passion for helping patients achieve lasting wellness by looking beyond symptoms and addressing the root causes of disease. Her approach blends evidence-based functional medicine with compassionate, individualized care, recognizing that true healing happens when physical, mental, and emotional health are treated as interconnected.
This personal mission led Michelle to pursue advanced training in psychiatry, with the goal of integrating functional medicine and mental health into a comprehensive model of care. She is passionate about helping patients navigate anxiety, depression, burnout, stress-related conditions, hormone-related mood changes, and other complex health concerns by combining conventional medicine with evidence-informed lifestyle interventions whenever appropriate
Lyndsey Williams
MMSc, PA-C
Lyndsey Williams, MMSc, PA-C, is a board-certified Physician Assistant with over a decade of experience in both traditional and functional medicine. She is passionate about helping patients understand the “why” behind their symptoms, taking a thoughtful, root-cause approach to care. Her style is grounded in curiosity, collaboration, and truly listening. Lyndsey believes some of the most meaningful healing happens when patients feel seen, understood, and supported—and she strives to create that experience in every visit.
Lyndsey has a special interest in connecting the dots between physical and mental health, with a keen ability to recognize subtle patterns in her patients’ stories and symptoms. She is known for breaking down complex information in a way that actually makes sense, helping patients feel informed, confident, and actively involved in their care.
Lyndsey earned her Master’s degree in Physician Assistant Studies at Emory University in Atlanta, GA. She grew up in Florida but now considers herself a proud Texan. Outside of work you can usually find her chasing around her two kiddos, at a concert with her husband, or planning her next travel adventure.
Megan Catalani
Health and Nutrition Coach
Megan is a certified Health and Nutrition Coach with over a decade of experience supporting functional medicine patients in achieving lasting health goals. She specializes in gut health, hormonal balance, and weight loss through personalized, sustainable lifestyle changes. With a deep passion for daily movement and holistic wellness, Megan empowers clients to take charge of their health through nutrition, mindful habits, and evidence-based strategies. She is also a certified yoga instructor, integrating movement and mindfulness into her coaching for a well-rounded, functional approach to wellness.
What is Functional Medicine?
Functional medicine is “root cause” medicine. It looks at the whole person as an individual to identify and address the underlying causes of symptoms, rather than simply managing them. Instead of a one-size-fits-all approach, functional medicine considers the full picture of health — including gut function, hormones, inflammation, metabolism, immune health, toxin exposure, lifestyle, and cellular function. Through a personalized, multimodal approach, we aim to support true healing and help patients restore balance, optimize their health, and improve overall well-being.