
Meet the Experts Dedicated to Your Wellness

Founder & CEO
Colleen L. Marshall is a board-certified Family Nurse Practitioner (FNP-BC) and Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC), and the visionary Founder and CEO of Serendipity Behavioral Health. With over a decade of experience in healthcare and behavioral health, Colleen brings a unique blend of clinical expertise, research-driven practice, and compassionate care to her leadership and clinical work.

Board-Certified Psychiatrist
Dr. John Timko is a board-certified psychiatrist with more than 30 years of experience in adult and geriatric mental health care. Based in Berks County since 1995, he has built a longstanding private practice and serves as a consultant to multiple hospitals and senior living communities in the region.

Licensed Marriage and Family Therapy
Life experiences shape the way I help others. I believe that truly knowing yourself is the key to building deeper, more meaningful connections with those around you.

Our team is ready to support you on your journey to mental wellness.
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