About Us

About Alternative Psychology

Alternative Psychiatry has highly qualified psychiatrists, advanced registered nurse practitioners, psychotherapists and clinical resource liaisons. We care about providing the best quality mental health care to our Patients.

We know that our patients are entitled to the most convenient, affordable, and accessible psychiatric and psychotherapeutic services and strive to live up to that goal. Alternative Psychiatry offers a full range of services, including medication management. We help under or uninsured individuals, under-served populations, and the general public.

Our Team

Mark Sylvester, MD 

Mark Sylvester, MD, ABAM, was born and raised in Sarasota, Florida. He received his medical education at the University of Miami and training at the University of Florida College of Medicine. Dr. Sylvester received graduate education in Neuropsychopharmacology and Psychobiology. He is board certified in Psychiatry & Neurology as well as Addiction Medicine. In addition to caring for his patients with FCITT, Dr. Sylvester practices Functional Psychiatry and Integrative Health at Alternative Psychiatry.

Dr. Sylvester is an adjunct faculty member at Lake Erie College of Osteopathic Medicine (LECOM) where he lectures and clinically trains medical students. He is active in research and is published in the Journal of Biomechanics, Journal of Global Drug Policy, and American Journal of Psychiatry, on topics related to biomechanics, obesity/food addiction, professionalism, addiction in clinical practice, and psychiatric symptoms in end-of-life care.

Sandra Hatfield, MSN, APRN, PMHNP-BC

Sandra was born and raised in eastern Kentucky. Her nursing career began in 2000, and she received her Bachelor of Science in Nursing degree from Western Governor’s University. She completed her Master of Science in Nursing degree specializing in psychiatry from Frontier Nursing University in Kentucky.

Sandra is a board-certified Psychiatric Nurse Practitioner and licensed in FL, NC, SC, and IL.

In her spare time, Sandra enjoys playing her guitar or taking walks with her 15-year-old schnauzer, Daisy. She is a member of the American Psychiatric Nurses Association.

Lilyana Dobreva, MSN, APRN, PMHNP-BC

Lilyana Dobreva is a board certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with a Master of Science in Nursing (MSN) degree. She is passionate about providing integrative psychiatric care by addressing environmental toxins, thyroid health, micronutrients, and inflammation. She is offering sensitive testing and medical grade supplements to correct imbalances. Lilyana screens for ADHD, anxiety, depression, bipolar, and other mental health disorders, and treats with mindfulness of patients’ preferences. She possesses strong clinical skills and incorporates evidence-based practice blended with knowledge from her 12 years’ experience in nursing. She has lived in the Sarasota area for 16 years, and can assist you with referrals, testing, and navigating the local healthcare system so you can reach your goals and potential. Lilyana also provides supportive therapy centered in humanistic principles, with focus on the growth and self-actualization of each client.