OUR TEAM
Treatment Philosophy
Adam's ttreatment approach is rooted in the understanding that first, we are made in the image of God, second, that our biology, psychology, and spiritual state have been impacted by the Fall, and third, that the redemptive work of Jesus Christ on our psychology begins with salvation and continues through the faithful stewardship of our mind and body. We hold strongly that medication does not constitute a lack of faith in God’s ability to bring miraculous healing but that it may be prayerfully considered when appropriate and accepted with thanks as a gift from God.
Adam O'Neill, PA-C, DMSc
Psychiatric Physician Assistant
Owner
Adam began practicing Christian Psychiatry in Philadelphia in 2019 after graduating from Thomas Jefferson University with a Master of Science in Physician Assistant Studies. Prior to moving to Philadelphia, he attended Wheaton College in Illinois where he earned his Bachelor of Arts in Psychology. In 2025 Adam earned his Doctor of Medical Science in Behavioral Medicine. As a board certified PA-C, Adam is licensed in the state of Virginia to prescribe medications.
Adam is a lecturer at multiple universities teaching in Physician Assistant, Pre-Health, and Pre-Med graduate and undergraduate programs. Since beginning practice Adam enjoys holding lectures and Q&A events for churches across the United States discussing mental health topics from a Christian perspective.
Being in practice highlights for Adam the ways that even in the midst of deep suffering God's goodness and glory are revealed.
In his spare time he enjoys writing and has written three books: The Mind after Eden: Psychiatry in a Post-Fall World, The Patience of Hope: Encouragement for the sufferer through the life and preaching of George Matheson, and The Mind for His Glory: A Philosophy of Applied Christian Psychiatry. He also serves as the founder and executive director of the Faith & Medicine Foundation.
Adam is a member of Capitol Hill Baptist Church.
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Healther Robinette, NP
Endocrinology/Women's Health
Heather is a Certified Women’s Health Nurse Practitioner with a specialty certificate in endocrinology. She earned her undergraduate nursing degree at Eastern University, a program endorsed by the American Holistic Nurses Credentialing Corporation. She then earned her master’s degree in nursing at the University of Pennsylvania and worked for Trinity Health as an ob-gyn nurse practitioner before attending Duke University to further specialize in endocrinology. For the last several years she has worked in an outpatient endocrinology office caring for both male and female patients with an array of chronic diseases such as thyroid disease (hypothyroid, Hashimoto’s) diabetes mellitus (T1, T2, and atypical), metabolic syndrome, obesity, hormone imbalance, and cholesterol disorders. As a women’s health nurse practitioner in endocrinology she takes a comprehensive and holistic approach in caring for women with PCOS, irregular cycles, endometriosis, fertility concerns, and menopausal symptoms. She believes in the health and importance of a monthly menstrual cycle and is an advocate of natural family planning. She provides in-depth education to aide her patients in understanding their hormones and the integral role they play in optimizing health and well-being.
Heather is a wife to an active duty AirForce officer and a mother. In her free time she enjoys baking sourdough bread, brewing kombucha, hiking and walking, and sharing home cooked meals with family and friends. She is a member of Tenth Presbyterian Church in Philadelphia, PA.
Siyoung Jung
Biblical Counselor
Siyoung is an ordained pastor for the Presbyterian Church in America (PCA) with 6+ years of biblical counseling experience in the church context. He graduated from James Madison University with a Bachelor of Science in Health Sciences. While working bi-vocationally in government consulting and ministry, he earned his Master of Arts in Biblical Studies from Reformed Theological Seminary in Washington, DC. He has also received training in pastoral biblical counseling through the Christian Counseling & Educational Foundation (CCEF). He is passionate about walking with people through difficult seasons, helping them apply Scripture to their journey, trusting that God speaks through His Word to bring comfort, healing, and hope to each person’s unique struggles.
Siyoung enjoys quality time with his family, playing the guitar, reading, and connecting with friends. He currently serves as the Executive Pastor at Cornerstone Ministry in Fairfax.
Physician Collaborators
Dr. Bao Nguyen, DO
Nursing Staff
Wendy Zettersten, RN, BSN
Ruth Choi, RN, BSN
Administrative Staff
Kelsey Stuart