Our STaff


Constance J Alexander, MD

Dr. Connie Alexander graduated St. Georges University School of Medicine, and completed her residency program in adult psychiatry at The Medical University of South Carolina in 1999. She is Board Certified with the American Board of Psychiatry and specializes in addiction medicine and adult psychology.


Julia J Rodriguez, NP, APRN-BC

Julia Rodriguez is a board certified Psychiatric Nurse Practitioner who works with clients who suffer from depression, bipolar disorder, anxiety disorders, substance abuse, PTSD, and schizophrenia. Julia graduated from the Medical University of South Carolina with her Master’s in Nursing after completing an undergraduate degree in Anthropology from the College of Charleston and a Bachelor’s of Science in Nursing from the Medical University of SC. Julia has worked extensively with the Latino community, offering mental health care in Spanish to this underserved community. Julia is the only Spanish speaking provider in the low country area to offer medication management services in Spanish. Julia’s approach to care is tailored to the client’s needs and may include psychotherapy and/or medication. As appropriate, treatment may also incorporate nutrition as a treatment tool. Hablo Espanol y estoy ofreciendo servicios a la comunidad Hispana.


Leah D Yeager, LISW-CP

Life can sometimes be unpredictable and feel overwhelming. I am here to help you navigate your path when it gets difficult and causes anxiety, depression, relationship difficulties, self-esteem issues and maladaptive means of coping like substance abuse. Through an integrative approach utilizing Mindfulness-Based Cognitive Therapy, we will identify thoughts and behaviors that are not serving you. I have worked with adults, adolescents and couples struggling with life transitions, stress management, self-doubt, sexual issues, trauma and addiction. If you are seeking a non-judgmental, supportive environment where you can receive collaboration and guidance to make changes towards a more fulfilling, easeful life, please reach out.


Stephen M Boice, LISW -CP, CAC-l

Steve is a graduate of the University of South Carolina having retired from the US Air Force after 21 years.He has worked in the substance abuse and mental health field for over 19 years and specializes in treating substance abuse, sexual and on-line pornography addiction, depression, anxiety, and trauma. Steve also works with couples struggling with relationship issues, focusing on recovering trust, improving communication, and re-establishing intimacy.


Rosa DiMarco, LISW-CP, CAC-l

Rosa is a graduate of the College of Charleston and the University of South Carolina. She specializes in treating substance use disorders and is passionate about helping families and loved ones understand and cope with the disease of addiction. Rosa is also trained in treating psychiatric disorders and working with people who are experiencing anxiety and mood related issues. As a licensed independent social worker, Rosa has experience in a variety of needs and issues such as: infertility, depression, anxiety, bipolar disorder, trauma, self-esteem issues, family/relationship issues, grief and more.


Jennifer K Hayes, PA-C.

Jennifer K. Hayes is a board certified physician assistant. She received a Master of Medical Science degree from Salus University after completing a Bachelor’s of Science in psychology. Jennifer has worked under Dr. Alexander for many years and provides psychiatric assessments, psychotherapy, and medication management services. She works with a range of psychiatric needs as well as addiction. Jennifer incorporates a holistic approach and tailors treatment to the individual needs of each patient.


Harriett Grady-Thomas, LISW-CP

Harriett Grady-Thomas is a seasoned Psychotherapist and Clinical Psychiatric Social Worker.  After receiving a Bachelor of Arts degrees in Psychology and Sociology from Mercer University in Atlanta, Harriett went on to be awarded a Masters degree in Clinical Psychology from the University of West Georgia in Carrollton Georgia, and a Masters Degree in Clinical Social Work from the University of South Carolina in Columbia, S.C.  While earning her MSW, she was on faculty at Trident Technical College in Charleston, S.C., (her home for most of her life, being born and reared here.) While at TTC, Ms Grady-Thomas taught Psychology, Sociology, and Human Services, and served as coordinator of all three departments. She also developed a two year Human Services Program with an internship.  TTC still offers this program today.

In 1990, while teaching at TTC, Harriett opened a private practice for Psychotherapy at the urging of fellow faculty members and Harriett maintained this practice throughout the years while working other jobs in her field until joining Barrier Island Psychiatry.

Harriett also worked at the Medical University of S.C. in the Alcohol and Drug and Dual Diagnosis Program, taking care of in and out patients for individual, family and group Psychotherapy.

In addition to the Addiction field Harriett has experience in Geriatrics, Pain Management, HIV/AIDS, and is a Certified Dragon’s Way Qigong Instructor.  Qigong is an internal martial arts program that has been practiced in China for over 5,000 years and is a catalyst to awaken the body’s own healing mechanisms.