Nilsa De Jesus Rosario, MD

More Clinicians

Dr. Christine Reyes is a bilingual Spanish-speaking adult psychiatrist with 25 years of experience. She completed her residency in Adult Psychiatry at Saint Vincent's Hospital and Medical Center in New York City and subsequently completed a Child Psychiatry fellowship at the University of Pennsylvania in Philadelphia. Dr. Reyes has extensive experience practicing in outpatient and community mental health settings.

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Treatment approach

Dr. Reyes provides compassionate psychiatric care using pharmacotherapy combined with supportive psychotherapy. She specializes in treating anxiety, depression, bipolar disorder, post-traumatic stress disorder (PTSD), and numerous other psychiatric conditions. Additionally, Dr. Reyes emphasizes nutritional counseling, assisting patients in achieving and maintaining a healthy weight as part of their overall wellness plan.

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What you can expect in a first visit

Patients can expect a compassionate and thorough initial assessment aimed at understanding their psychiatric symptoms, personal health goals, and lifestyle considerations. Dr. Reyes combines medication evaluation with supportive psychotherapy and may discuss nutritional guidance as part of a holistic treatment plan. She prioritizes creating a supportive environment for bilingual (English/Spanish) patients to openly discuss their mental health concerns.

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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.

Karelis Sierra-Cintron, MD

Staff Psychiatrist

Dr. Sierra-Cintron is board-certified in adult psychiatry by the American Board of Psychiatry and Neurology and has been in practice for 12 years. Dr. Sierra-Cintron focuses her practice on medication management. She also engages in supportive therapy in a comprehensive way, focusing on the patient as a whole and not just the symptoms. Dr. Sierra-Cintron has a broad understanding of vitamin support as an adjunctive treatment to traditional medication. She has broadened her understanding of second-line treatment, having been certified in Electroconvulsive Therapy (ECT), conducting clinics in Clozapine and Long-Acting Antipsychotics (LOA), and even conducting assessments for patients interested in weight loss surgery. Dr. Sierra-Cintron has a comprehensive approach to treatment, and might consider the addition of therapy, either by referral or collaborating with an existing therapist for a more rounded approach and improved outcome. Dr. Sierra-Cintron received her medical degree from the Universidad Central del Caribe located in Bayamon, Puerto Rico. Upon graduation, she relocated to Philadelphia, where she started her residency program at Einstein Medical Center. After completing her training, she worked for 8 years in a community mental health clinic, treating an underserved population in all modalities of psychiatric care. In her 12-year career, Dr. Sierra-Cintron has treated both adult males and females, including seniors. This has led to varied and wide-ranging diagnoses during the length of her career. After leaving the community clinic setting, she started working for an outpatient clinic in a suburb of Philadelphia. Dr. Sierra-Cintron's current areas of focus are adults with Mood Disorders, Anxiety Co-Occurring Substance disorders, as well as patients with varied concomitant medical problems.‍

Shelley Sellinger, MD

Staff Psychiatrist

Dr. Shelley Sellinger is a board-certified psychiatrist who has been in practice for 25 years. Her career has been devoted to serving both her local community as well as high-risk and underserved patients. As a pioneer and advocate for the use of telepsychiatry years prior to the pandemic, she has presented at the American Telehealth conference as well as at grand rounds. Dr. Sellinger's practice focuses on medication management as well as supportive and insight-oriented psychotherapy. She believes that a combination of therapy, as well as the use of medications, helps provide a patient with the best outcome. Her goal is to help patients live their best and most fulfilling lives. In addition to general psychiatry, she has a keen interest in mood disorders, helping creatives achieve their goals and the LGBTQ community.‍

Nereida Gonzalez-Berrios, MD

Staff Psychiatrist

Background and credentials

Dr. Nereida Gonzalez-Berrios is a general psychiatrist fluent in English and Spanish. She earned her bachelor’s degree in Microbiology from the University of Puerto Rico and her medical doctorate from Ponce School of Medicine (now Ponce Health Sciences University). She completed her General Psychiatry Training Program at the University of Puerto Rico Medical Sciences Campus, graduating in 2008. After practicing privately in Puerto Rico, she relocated to Texas, where she worked for over five years at the Michael E. DeBakey VA Health System, providing mental health care to veterans. She has also gained extensive experience in telemedicine, working both within the VA system and as a locum tenens provider.

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Treatment approach

Dr. Gonzalez-Berrios has extensive experience treating a wide range of psychiatric conditions, including mood disorders, anxiety disorders, psychotic disorders, intellectual impairment, ADHD, eating disorders, PTSD, and personality disorders. She integrates traditional psychiatric treatment with a holistic wellness approach, drawing on her background as a motivational speaker, wellness coach, certified personal fitness trainer, nutrition coach, and weight-loss specialist. Her approach emphasizes improving overall mental and physical well-being through personalized treatment plans that incorporate psychiatric care, wellness strategies, and lifestyle modifications.

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What you can expect in a first visit

Patients can expect a comprehensive psychiatric evaluation where Dr. Gonzalez-Berrios carefully assesses their symptoms, medical history, and personal wellness goals. She takes a collaborative and patient-centered approach, ensuring that treatment is tailored to each individual’s mental and physical health needs. As an experienced telemedicine provider, she offers accessible and flexible mental health care, combining medication management and holistic wellness strategies to help patients achieve lasting well-being.

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Why Talkiatry?

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Keri Lemmond, MD

Staff Psychiatrist

Dr. Keri Lemmond is a board-certified adult psychiatrist with over 25 years of experience. Her practice focuses on medication management and ongoing supportive therapy during a 30-minute follow-up visit. Dr. Lemmond is a graduate of the Texas A&M Health Science Center and completed her residency training in adult psychiatry at Warren Alpert Medical School of Brown University. She previously held a faculty position with the University of Colorado School of Medicine and was a staff member at the Colorado State University Health Network. ‍In addition to her work with young adults in the college setting, she has had additional experience working with adults with co-occurring ADHD, substance use, PTSD, OCD, and premenstrual dysphoric disorder. Dr. Lemmond has been recognized for her approachable, empathic style when meeting individuals for the first time and throughout their work together. When necessary, she will recommend specific therapy modalities with a collaborating therapist for the best outcome. In her free time, Dr. Lemmond enjoys spending time with her family, traveling, and gardening.

Jami Jacobson, LMHC

Staff Licensed Mental Health Counselor

Jami Jacobson, MA, LMHC is a psychotherapist at Talkiatry. She achieved her Bachelor of Science in Psychology from the University of New Orleans in 2014, and her Master of Arts in Mental Health Counseling and Wellness from New York University in 2017. Jami has experience as both a mental health professional and as a social worker in a variety of settings in New York City. She has worked with individuals, families and the LGBTQIA+ community in hospitals, educational training centers, community outreach and housing programs, and family services. Her specializations include treating Phobias, Trauma, and Anxiety Disorders: specifically Obsessive Compulsive Disorder, Generalized Anxiety and Social Anxiety. She utilizes techniques from Cognitive Behavioral Therapy (CBT) and Dialectical Behavior Therapy (DBT). She has also completed Phase One training in Brainspotting, which specializes in addressing traumas in the subconscious and unconscious mind. Jami believes therapy should be a wholistic approach that incorporates both the body and the mind. She has a warm demeanor and seeks to create a safe, comfortable, and judgement-free zone, personalized for each client's unique needs. She seeks to educate her clients on the ties between feelings, thoughts, and behaviors, as well as how our environment and our past can have an influence on our day-to-day lives. ‍

Barbara Pack, LPCC

Staff Therapist

Barbara (Barb) Pack is a Licensed Professional Clinical Counselor with the Supervision Endorsement and a Licensed Independent Chemical Dependency Counselor, Clinical Supervisor Endorsement who has been providing mental health treatment for over 24 years and addiction treatment for over 27 years. Barb utilizes a combination of approaches in working with her clients, including person-centered, cognitive behavioral therapy, motivational interviewing, solution focused techniques, and a variety of other techniques. She has experience in several different types of treatment settings and treatment modalities in both Ohio and Florida. Barb enjoys working with individuals who also have co-occurring disorders, both mental health and substance use. Barb has experience working with a wide range of age groups and mental health issues including but not limited to depression, anxiety, trauma, stress management, grief, relationship issues, and a wide range of substance use issues. She will assess individuals' needs in their first few visits and work with them to develop an individualized treatment plan. Barb works to provide the empathetic listening and emotional support that her clients need to reach their goals. Her dream has been to work herself out of a job, as she wants to help her clients find healing and happiness. Barb attended the University of Akron for graduate school in a Community Counseling Program and attended Malone College, now University, and majored in Psychology.

Chelsea Karson, MD

Staff Psychiatrist

Dr. Chelsea Karson is a board-certified psychiatrist who completed her residency training at Advocate Lutheran General Hospital where she was Chief Resident of her program. Dr. Karson is passionate about patient care, believing in caring for the whole person. While completing her residency training, she led an interprofessional team to bring miniature-therapy horses to the inpatient psychiatry unit and thereby forge a relationship between the organization and all of Advocate Aurora Healthcare. Dr. Karson partnered with a mental health counselor to create a virtual therapy program of resources, the Bridge Project, to close the gap between inpatient and outpatient care that is now used throughout the Advocate Aurora network. At graduation Dr. Karson received the 2024 Advocate Lutheran General Hospital Ruggie Humanitarian Award. The Ruggie Award selects and honors a graduating resident or fellow who displays academic excellence, commitment to the education of others, professional bearing, and a concern for the patient within the light of Human Ecology. Dr. Karson attended undergraduate at Elmhurst University, a biology major with minors in chemistry and medical humanities. She went to medical school at Rosalind Franklin University and was chosen to join the Gold Humanism Honor Society for her dedication to compassionate patient care.

Raquel Weinum, LCSW

Staff Licensed Clinical Social Worker

Raquel Weinum is a licensed clinical social worker. Her career in the field has spanned over 20 years and includes work with adults, adolescents, and children from diverse populations and experiences. She has treated a wide range of symptoms and challenges, including but not limited to, depression and other mood disorders, anxiety, chronic stress, trauma, difficulty with relationships, family conflicts, and loss. ‍Her style is warm and engaging. She considers the role of the therapist to be collaborative. As a therapist she aims to create a safe non-judgmental space for self-exploration, discovery, and healing. The goals in the therapeutic process may involve developing new skills to cope with emotional pain, learning to set new boundaries in relationships, or finding more meaning in life. She utilizes a wide range of approaches, including cognitive behavioral therapy, motivational interviewing, narrative therapy, relational and psychodynamic approaches, and mindfulness and embodiment work. Regardless of the modality, her work is always trauma informed and strength-based. ‍Ms. Weinum received her Master's degree in Social Work from Fordham University and her BS in psychology from Brooklyn College. She has worked in varied settings including hospitals, community mental health/substance abuse clinics, and home-based crisis intervention services. She has provided individual and group psychotherapy, and has served in supervisory/administrative roles throughout her career.‍

Jeffrey Niles, DO

Staff Psychiatrist

Dr. Niles (he/him) holds the position of Staff Psychiatrist at Talkiatry. He has four years of experience in outpatient psychiatry and is board-certified for adult psychiatry. He has received training in the use of cognitive behavioral therapy, supportive therapy, motivational interviewing, psychodynamic therapy, and dialectical behavioral therapy skills. He uses his training in therapy in tandem with medicine management to provide holistic, person-centered care. During his undergraduate studies at the University of Pittsburgh, while completing his pre-medical classes, he also pursued certification in the history and philosophy of medicine. Additionally, he studied the effect of culture and ethics on healthcare. He earned a Bachelor of Science in Psychology with a minor in Chemistry. He attended medical school at the West Virginia School of Osteopathic Medicine. His psychiatry residency training was completed at Charleston Area Medical Center. While in residency, he worked to improve cultural awareness in the outpatient setting. Dr. Niles is interested in treating patients with a wide variety of diagnoses. He treats mood disorders, anxiety disorders, trauma-related disorders, personality disorders, OCD, comorbid addiction, mild eating disorders, neurodevelopmental disorders such as autism spectrum disorder, and more. He also strives to provide care that affirms LGBTQIA+ identities and underwent additional training in transgender mental healthcare.

Rajesh Gaddam, MD

Staff Psychiatrist

Dr. Rajesh Gaddam is a Board Certified Psychiatrist who provides compassionate and empathic care. Prior to his formal training, he worked in clinical psychiatric research at Northwell, gaining experience in evidence-based medicine. He completed his adult psychiatry residency at Bergen New Bridge Medical Center, followed by Child & Adolescent Psychiatry Fellowship at The University of Chicago, where he served as Chief Fellow. Dr. Gaddam treats children, adolescents, and adults for a range of conditions including anxiety, depression, bipolar disorder, trauma, OCD, ADHD, and substance use disorders. Dr. Gaddam emphasizes a collaborative and comprehensive approach to understand a person's life, their circumstances, and what has contributed to their symptoms. He recommends including a family member or close friend in at least one session to get a sense of challenges from a different perspective. Besides using elements of supportive and psychodynamic psychotherapy, Dr. Gaddam will refer and work with your psychotherapist to foster self-reflection and growth. He also greatly values a holistic approach to treatment, emphasizing the importance of nutrition, physical activity, sleep hygiene, mindfulness, and a support system to well-being. He wishes to provide a safe space to promote healing and wellness, so individuals can prosper in their lives.

Cerra Guins, LMHC

Staff Therapist

Cerra Guins is a licensed clinical mental health counselor and certified dialectical behavioral therapist. She has worked with various ages, mental health disorders, and culture backgrounds. Cerra attended undergraduate school in Summerdale, PA, graduate school in Altamonte Springs, FL, and attended an internship in Apopka, FL. Cerra has been practicing for 4 years as a Clinical Mental Health Counselor, focusing on mood disorders, psychosis, and crisis intervention. Cerra prioritized tailoring treatment around each individual in an effort to provide the most beneficial services by using a treatment modality that fits the individual's personal concerns. Cerra uses a Dialectical Behavioral approach with a foundation in Cognitive Behavioral Therapy.

Nilsa De Jesus Rosario, MD

Education and training

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