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Meet Our Residents

Elizabeth Bartman, ND

Dr. Elizabeth Bartman is a licensed naturopathic physician completing her second-year residency at NCNM. She received her doctorate of naturopathic medicine from NCNM in 2013. Dr. Bartman is a member of the American Association of Naturopathic Physicians and Oregon Association of Naturopathic Physicians and has training in naturopathic primary care and family medicine. Her interests include gastrointestinal health, endocrine imbalances, autoimmune disease management, mental health and geriatric medicine and healthy aging.

During her clinical training, Dr. Bartman completed a six-month rotation in naturopathic cardiology and pulmonary medicine under the guidance of Dr. Martin Milner and Dr. Jeremy Mikolai. She also spent extensive time working as a medical student in various community clinics, providing care to patients of various socio-economic status and backgrounds. While completing her studies in naturopathic medicine, Dr. Bartman sought several outside courses and seminars that enhanced her knowledge of botanical medicine and nature cure modalities.

Prior to becoming a naturopathic physician, Dr. Bartman earned a Bachelor of Science degree in cellular and molecular biology from Pacific University in Forest Grove, OR. Her work in research and in the nursing field brought her extensive experience working with geriatric and mentally ill populations, as well as exposure working with drug and alcohol rehabilitation. Nursing home and hospital work prompted her desire to promote preventative medicine within her community. Her desire is to guide patients to their optimal state of health through healthy diet and lifestyle choices, as well as using individualized, evidenced-based medicine to treat root causes of a patient's disease or illness.

In her spare time, Dr. Bartman enjoys exploring new recipes and cultivating her culinary skills, music performance, and enjoying the rich outdoor diversity the Pacific Northwest has to offer.


Nathaniel Bingham, ND

Dr. Nathaniel Bingham is currently completing his first year of residency as the heart and lung resident at NCNM and the Center for Natural Medicine with Dr. Martin Milner and Dr. Jeremy Mikolai. He received his bachelor's degree in business administration and economics from the University of Oregon in Eugene, OR and graduated form NCNM in June of 2013. His clinical interests include cardiology, dermatology and minor surgery.

Dr. Bingham has the unique experience of having a cardiovascular and pulmonary naturopathic residency. This opportunity allows him to focus on ECG and stress ECG interpretations in addition to prescribing therapeutic exercise and nutrition specific recommendations. An interest in cardiovascular and pulmonary conditions stems from his prior experience working in public health and see first-hand how diet, exercise and lifestyle modifications contribute to a person's health.

Outside of residency, Dr. Bingham is married and has one daughter. He enjoys spending time with his family, studying and improving his Spanish, climbing and snowboarding.


Lai Chim Chan, ND

Dr. Lai Chim Chan is a licensed naturopathic physician completing her first year of residency at NCNM. She graduated from NCNM in June 2014 with her Doctorate of Naturopathic Medicine. Prior to her studies at NCNM, Dr. Chan completed her bachelor’s degree in chemistry from Willamette University.

During her clinical training at NCNM, Dr. Chan completed numerous clinical rotations in naturopathic primary care. As a medical intern she also completed specialty naturopathic rotations in cardiopulmonary medicine, women’s health, physical medicine, homeopathy, minor surgery, IV therapy, and environmental medicine.

Dr. Chan is passionate about providing patient-centered health care and she believes being a naturopathic physician trained in both conventional and natural therapies allows her to provide individualized health care to fit each individual patient’s needs. She is committed to empowering and guiding her patients toward better health through education and helping them make their own informed decisions in their health care.

Dr. Chan enjoys offering a variety of treatment options to her patients but two of her favorite naturopathic modalities are physical medicine and homeopathy. She truly believes in the naturopathic principle of treating the whole person and using homeopathic remedies allows her to treat each person on the mental, emotional, and physical realms. As a medical student, she completed advanced coursework in constitutional homeopathy through the New England School of Homeopathy taught by renowned homeopaths Dr. Paul Herscu and Dr. Amy Rothenberg.

Dr. Chan has a broad primary care focus but her professional interests include cardiopulmonary medicine and diabetes management. She is passionate about providing naturopathic primary care to the medically underserved; and one of her goals as a physician is to make naturopathic medicine accessible to all. Dr. Chan is a current member of the American Association of Naturopathic Physicians and Oregon Association of Naturopathic Physicians.

When not working, Dr. Chan enjoys spending time with her family and friends, writing poetry, listening to music, and traveling.


Andrea Del-Olmo, ND

Dr. Andrea Del-Olmo is a licensed naturopathic physician entering her first year of residency at NCNM. She graduated from NCNM in 2013 with a doctorate in Naturopathic Medicine and a certificate in Natural Childbirth. While in school, Dr. Del-Olmo worked for four years as a teaching assistant in gross anatomy and assisted in over 75 live births in the greater Portland area. Her areas of concentration include women's health, homeopathy and minor surgery.

Dr. Del-Olmo received her baccalaureate from the University of California, Santa Cruz, graduating cum laude with a degree in community studies, emphasizing sustainable agriculture and permaculture. Prior to attending school at NCNM she studied botanical medicine at the Columbines School of Botanical Studies in Eugene, Oregon and ayurvedic medicine at the Dhyana Center in Sebastopol, California. She has also spent many years traveling and living abroad in countries across Asia, Africa, Europe, Central America and the Caribbean.

Dr. Del-Olmo has an integrative approach to health care, which addresses mental, emotional and physical needs while utilizing the best of both conventional and alternative medicine to provide safe and effective treatment. When not working she enjoys sailing, surfing, hiking, kayaking, wild-crafting, cooking and gardening.


Corina Dunlap, ND

Naturopathic physician committed to empowering patients to reach their optimum health and wellness by combining traditional healing wisdom and the most up-to-date research in conventional and natural medicine. Passions include identifying the root cause of health concerns, education, and prevention.

Dr. Corina Dunlap graduated with a Doctorate in Naturopathic Medicine and Master of Science in Integrative Medicine Research from the National College of Natural Medicine (NCNM). She is a first-year resident at A Woman’s Time and the NCNM Teaching Clinic, as well as a post-doctoral fellow at Helfgott Research Institute. Before NCNM, she received her B.A. from Smith College with an emphasis in Medical Anthropology and International Relations.

Prior to her graduate training, Dr. Dunlap spent several years as an Outward Bound educator and Wilderness First Responder. She traveled and worked abroad, including time spent with the WHO and UNICEF in northern India. Through her experiences and observations of various medical traditions, she was drawn to practice a model of healthcare that focuses on the whole person.

In addition to all aspects of primary care, special interests include women’s health, neuroendocrinology, reproductive endocrinology, overall hormone imbalances, environmental medicine, skin conditions, metabolic disorders, obesity, and chronic disease. Graduate research topics include infertility, cervical dysplasia, interstitial cystitis, biotherapeutic drainage, and Ayurveda.


Dr. Megan GolaniMegan Golani, ND

Dr. Megan Golani is a licensed naturopathic physician and midwife in her third year of residency at the National College of Natural Medicine focusing on family and community medicine. She graduated from NCNM in 2012 with honors and a certificate in natural childbirth.

During her studies, Dr. Golani completed a two-year clinical mentorship rotation in women’s health under the direction of Dr. Kimberly Windstar and a six–month internship focusing on chronic disease management and biotherapeutic drainage with Dr. Dickson Thom. Additionally, she completed a two-year apprenticeship in women’s health, midwifery, and pediatrics with Dr. Catherine Schaefer in her private practice. She also has trained with Tami Kent in holistic pelvic care.

Dr. Golani received her baccalaureate degree from the University of Michigan-Ann Arbor where she focused on developmental and transpersonal psychology, with an emphasis the mind-body connection.

Dr. Golani believes strongly in the holistic approach to medicine; integrating nutritional and lifestyle counseling, IV therapy, herbal medicine, and homeopathy to provide individualized patient centered care. She is passionate about supporting families through fertility counseling, prenatal and postpartum care, and pediatrics.

When not working, Dr. Golani is a Providence Hospice volunteer and enjoys camping, meditating, practicing yoga, and traveling abroad with her husband.


Katherine Lewis, ND

Dr. Katherine Lewis is a licensed Naturopathic Physician completing her first year residency at NCNM. She graduated with a doctorate in naturopathic medicine in 2014 from National College of Natural Medicine. During her time at NCNM she completed a one-year rotation at Center for Natural Medicine focused on cardiology, pulmonology, and chronic disease management. Her other clinic interests include primary care, physical medicine, IV therapy, minor surgery, homeopathy and diabetes management.

Prior to her naturopathic medical training she received her bachelor of science from Oregon State University in dietetics. Understanding the role nutrition can play in disease processes fueled her desire to learn even more about the root of disease and how to keep people healthy.

Through her experiences at NCNM Dr. Lewis learned the importance of setting a foundation for health, by addressing lifestyle, diet, exercise and emotional imbalances. She enjoys utilizing many forms of naturopathic medicine from deep breathing to IV therapy and has witnessed the resulting profound healing.

When Dr. Lewis isn’t busy being a doctor she continues her education via seminars and research. Her hobbies outside of medicine include knitting, hiking, climbing, bicycling and snowboarding.


Laura Lewman, ND

Dr. Laura Lewman is a licensed naturopathic physician completing her first year of residency at NCNM. She received her doctorate in naturopathic medicine from NCNM in 2014, graduating with high honors. Her clinical training at NCNM included a six-month internship in cardiopulmonary medicine, as well as extensive training with IV therapy and botanical medicine.

Prior to her time at NCNM, Dr. Lewman earned a Bachelor of Science degree in mathematics from the University of Alberta, graduating with distinction. She first become acquainted with natural medicine through her own healing journey, and quickly become passionate about pursuing a career in naturopathic medicine.

Dr. Lewman uses an integrative approach to formulating treatment plans, and chooses the best from the huge array of both naturopathic and conventional medical modalities to ensure optimum results. Educating patients is a pillar of her practice, and Dr. Lewman loves teaching patients about their bodies and empowering them to take charge of their health. She embraces the challenge of motivating and coaching her patients as they implement effective and lasting lifestyle changes to both treat and prevent disease. Although she has a general medicine practice, Dr. Lewman has a particular interest in treating athletes as well as managing diabetes, metabolic syndrome, and obesity.

When not busy doctoring, Dr. Lewman likes reading, spending time with her husband, and exploring Portland's food scene. She is a self-confessed gym rat, and loves weight-lifting, running, kettle bells, and any other physical challenge.


Dr. Jessica NagelkirkJessica Nagelkirk, ND

Dr. Jessica Nagelkirk is a licensed naturopathic physician completing her second–year residency at National College for Natural Medicine, where she received her Doctorate of Naturopathic Medicine. During her course of study, Dr. Nagelkirk completed an internship specializing in cardiovascular and pulmonary medicine. Dr. Nagelkirk offers primary naturopathic care and has a particular interest in chronic disease management, women’s health, and aesthetic medicine. Additionally, Dr. Nagelkirk is committed to providing comprehensive medical care that is shaped by evidence–based medicine to address the fundamental cause of illness. She is a member of the American Association of Naturopathic Physicians, Michigan Association of Naturopathic Physicians, and Oregon Association of Naturopathic Physicians.

Prior to becoming a naturopathic physician, Dr. Nagelkirk completed a Bachelors of Science degree in general science from the University of Oregon. She has worked actively in her community to support the medically underserved population and educate the general public about the importance of promoting and maintain health. 

In addition to working as a resident naturopath and writing educational articles, Dr. Nagelkirk enjoys spending time with her 10 year old rottweiler named Misha, gardening, hiking, mountain biking, skiing, cooking, and enjoying the company of friends and family.


Meghan Sperandeo, ND

Dr. Meghan Sperandeo is a licensed naturopathic physician completing her first year of residency at NCNM. She earned her doctorate in naturopathic medicine in 2013, graduating with high honors. During her internship, Dr. Sperandeo completed a six-month clinical mentorship in cardiopulmonary medicine.

Before attending NCNM, Dr. Sperandeo received her bachelor's degree in 2003 from McNeese State University in biological sciences and participated in the department's research program.

Dr. Sperandeo offers naturopathic primary care and has a strong dedication to providing comprehensive and individualized care to every patient. She believes strongly in the power of lifestyle counseling, nutrition, botanical medicine and homeopathy in managing both acute and chronic disease.