Gerald Matthews, MD

Background and credentials    

Dr. Alexander Wittenberg is a board-certified adult psychiatrist. He received his undergraduate degree from Cornell University, majoring in Human Biology, Health, and Society. He earned his medical degree from the New York Institute of Technology College of Osteopathic Medicine, where he was a  member of the Psi Sigma Alpha Osteopathic Honor Society. As chief resident at  Mount Sinai Beth Israel, he gained extensive experience working in outpatient  settings and managing patient care at one of New York City's busiest clinics. Dr. Wittenberg has expertise in treating a wide range of mental health conditions, including depressive disorders, anxiety disorders, bipolar disorder, trauma and stressor-related disorders, and OCD.    

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Treatment approach    

Dr. Wittenberg offers highly individualized and empathic treatment, primarily focusing on medication management. He frequently recommends integrating therapy into treatment plans and may suggest collaborating with a therapist. Dr. Wittenberg prioritizes a holistic approach, emphasizing overall well-being alongside symptom relief. He encourages the incorporation of mindfulness, self-compassion, exercise, nutrition, and attention to interpersonal relationships into his treatment strategy.    

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What you can expect in a first visit    

During an initial visit with Dr. Wittenberg, patients can anticipate a collaborative, patient-centered, and non-judgmental environment designed to foster a meaningful therapeutic relationship. He will thoroughly discuss individual concerns and treatment goals, exploring potential therapeutic interventions, including medication management and holistic strategies to support mental health and overall wellness.

Why Talkiatry?    

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

Dr. Caitlin Gardiner is a board-certified psychiatrist specializing in child and adolescent psychiatry and psychotherapy. Dr. Caitlin Gardiner's practice is based on the biopsychosocial model and believes that the foundation of healing is in psychotherapy and human connection. She is known for incorporating therapy into her medication management practice. Typically she offers 30-minute follow-up visits for medication management with focused therapy based on individual needs. As a known helper, Dr. Gardiner started her career with a bachelor's degree in social work from Cazenovia College in Cazenovia, NY. After changing career paths, she received her medical degree from SUNY Upstate Medical University in Syracuse, NY. She stayed upstate to complete her general psychiatry residency, where she was chief resident at the beginning of the COVID-19 pandemic. Following this, she completed her child and adolescent psychiatry fellowship at Upstate due to the high quality of training. Dr. Gardiner has completed 3 years of advanced training in Dynamic Deconstructive Psychotherapy as well as specialized training in DBT. Dr. Gardiner is a well-rounded psychiatrist who enjoys treating youth and young adults during transitional phases of life while providing a safe and supportive environment. She believes strongly in reducing polypharmacy and providing high-quality medication management through a therapeutic and developmental lens.

Dr. Wellin is a double board certified psychiatrist specializing in child and adolescent psychiatry and adult psychiatry. She has been in private practice and worked in community clinics for over 44 years. Dr. Wellin's practice focuses on medication management in conjunction with supportive psychotherapy in 30-minute follow-up visits. She encourages a team approach involving psychotherapists, medical doctors, and parents and family when appropriate, to provide holistic care for optimal outcomes. Dr. Wellin received her medical degree from the Albert Einstein College of Medicine, in Bronx, NY. She did her residency in adult psychiatry at the Jacobi Hospital Department of Psychiatry in Bronx, NY. Her fellowship in child and adolescent psychiatry at Columbia University St Luke's-Roosevelt Hospital NYC followed. For the last 5 years, she has been an assistant clinical professor at the Adolescent Health Center at Mt Sinai Hospital NY. During this period she was also a consulting psychiatrist at the McShane Center for Psychological Services at Pace University. Dr. Wellin trained at the Psychoanalytic Institute at NYU. She was certified in hypnosis by NYSEPH in NYC and she has also received training in EMDR. Dr. Wellin worked at a NYC rehab for substance abusers and was the medical director of a private program for children of substance abusers and their families. Her primary current focus is on adolescents and college-aged patients.

Ashley Sharp is a Licensed Professional Counselor with Mental Health Service Provider
designation, who has experience working in multiple settings within the mental health
field including private practice counseling, school-based counseling, and in a behavioral
health hospital. This has allowed Ashley to work closely with individuals of various
demographics and a wide spectrum of mental health conditions. Ashley obtained her
undergraduate degree in psychology from Bryan College in Dayton, TN, and graduate
degree in clinical mental health counseling from Richmont Graduate University in
Chattanooga, TN.

Ashley has been working in the mental health field for 4 years and
focuses on mood and anxiety disorders, as well as personality disorders,
challenges in relationship dynamics, and difficult life transitions such as grief and
divorce. Ashley tailors her treatment modalities for the greatest benefit of the individual,
being considerate of the background and needs of each client.
Ashley uses an eclectic approach to therapy founded in Cognitive Behavioral Therapy
and incorporates elements of Dialectical Behavior Therapy such as mindfulness,
distress tolerance, and emotional regulation.

Andrea Roth is an LCSW in New York. Her recent work was at a community-based mental health clinic, where she worked with people of all ages and with various goals for counseling. She has 18 years of experience in human service and nonprofit organizations. She previously worked at a community organization in Syracuse that provides support to people with sensory loss, to maintain or establish independence. Additionally, she worked as a therapist with a Mobile Crisis team. Andrea received a Master's Degree in Social Work and a BA in Psychology from Syracuse University. She has also completed training in Conflict Resolution. Her therapeutic approach is client-centered and strengths-based, emphasizing collaboration and empowerment. She believes in creating a safe and supportive environment where clients can explore their concerns, gain insight, and develop skills to cope effectively with life's challenges. Her clinical approach is to utilize the treatment model that best fits the unique needs of each individual. She strives to be sensitive to the various factors that might impact a person's identity, such as culture, ethnicity, disability, neurodivergence, or being part of the LGBTQ+ community. Andrea's work is informed by several different modalities, including CBT, DBT, IFS, and Mindfulness-based interventions. She has experience treating many mental health conditions such as Anxiety, Depression, Bipolar disorder, Trauma, Anger, Grief, and PTSD.

Jeanine Foley is a board-certified Psychiatric-Mental Health Nurse Practitioner (PMHNP-BC) with over a decade of experience in both inpatient and outpatient settings. She holds a Doctorate of Nursing Practice from the University of Colorado Denver, an MSN from Vanderbilt University, and a BS from Boston University. Her career includes service as an active duty PMHNP in the U.S. Air Force and roles in the VA and private psychiatric hospitals. She also serves as Adjunct Clinical Faculty for a PMHNP graduate program.

Jeanine believes in patient-centered care built on trust, collaboration, and respect for each individual’s life story. She integrates medication management with therapeutic techniques and creates a safe, inclusive space that is trauma-informed and aligned with each patient’s values. Jeanine emphasizes genuine connection and strives to help clients explore root causes of distress—not just manage symptoms.

Jeanine begins with a comprehensive, collaborative assessment of each patient’s medical, psychiatric, and psychosocial history. She partners with patients to develop flexible, personalized treatment plans that support holistic mental health. Her approach combines psychopharmacologic and psychotherapeutic interventions, continuously adjusting plans based on feedback and progress.