Maralys Colon Betancourt, MD

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Michael Russell is a licensed mental health counselor with extensive experience in the mental health field. Michael has worked directly with clients living with various mental health conditions. He attended Undergraduate and Graduate school in Queens, NY. Michael works on continuing to expand upon his experience and knowledge in the mental health field by attending trainings and receiving certifications in niche areas. Michael has been practicing for 6 years as a Clinical Mental Health Counselor, focusing on anxiety and mood disorders and life challenges, which may impact daily life. He likes to tailor treatment to each individual so that it fits that individual's specific needs. Michael uses an integrative approach with a foundation in Cognitive Behavioral Therapy and Person-Centered Therapy.

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?

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.

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Luna Sanchez Rivera, MD

Staff Psychiatrist

Dr. Luna Sanchez Rivera holds the position of Staff Psychiatrist at Talkiatry. After completing residency in 2016 at the Ponce Medical School Psychiatry Residency in Puerto Rico, she then moved to North Carolina to complete a subspecialty in Child and Adolescent Psychiatry at Duke University Health System. There, she transitioned into an assistant professor position, focused on structuring pediatric emergency psychiatric services, and helped support the consult and liaison pediatric service. Her years of experience have included working as an integrated care child psychiatrist within outpatient clinics at Duke University Health System, and she trained and worked as a staff psychiatrist at the Inpatient State Facility in North Carolina. She also served in the Dayton Children's Hospital outpatient clinics in Dayton, Ohio, the Appalachian Health System outpatient clinics in Linville, North Carolina, and more recently has been serving the Child and Adolescent inpatient population in Bangor, Maine. Dr. Sanchez Rivera has an approachable style aimed at providing a comprehensive evaluation for all age ranges and is comfortable managing various levels of diagnostic complexities. She provides supportive psychotherapy while using psychodynamic therapy skills to clarify her patient's constellation of symptoms, identify unifying themes and provide thorough psychoeducation throughout the process to drive positive outcomes. She integrates psychodynamic medication management approaches and is adept at family therapy interventions.

Lorraine Wharton-Mohammed, MD

Staff Psychiatrist

Dr. Wharton-Mohammed is double board certified in General Psychiatry as well as Child and Adolescent Psychiatry. She has worked in various settings with culturally diverse populations. Her primary focus has been caring for children in the outpatient programs. Dr. Wharton-Mohammed has spent over ten years as an administrative leader. She has chaired and co-chaired committees overseeing the practice of fellow Psychiatrists and served as the Discipline Chief. She has been teaching/ supervising Nurse Practitioner students and Physician assistant students. Dr. Wharton-Mohammed is experienced with a wide variety of psychiatric diagnoses and therapeutic modalities. She is a dedicated clinician who looks out for her patients. She views each patient and their caregivers' circumstance as unique. She takes a holistic approach with a collaborative approach to help patients understand their options. While the focus may be on psycho education and medication management with supportive and psychodynamic therapeutic interventions, there may be a need for additional therapy. She may ask that a therapist be added to your treatment team. She works towards establishing a meaningful trusting relationship and looks forward to working with you to help you achieve your goals.

Andrea Hamilton, LPC

Staff Therapist

Andrea Hamilton, LMHC, MBA is a Licensed Mental Health Counselor with over 20 years of experience providing compassionate and effective therapeutic care to individuals, families, and groups. Throughout her career, she has worked across diverse settings, including educational institutions, foster care systems, group homes, government agencies, and healthcare organizations. This extensive background has equipped her to address a wide range of mental health challenges, including anxiety, depression, trauma, relationship issues, and life transitions.

She holds a Master of Education and an MBA from Florida Atlantic University, along with a Bachelor of Science in Psychology with a minor in Criminal Justice. She is CFARS Certified, and a Qualified Supervisor in the State of Florida. Her commitment to professional growth is evident in her numerous certifications and specialized training in ethics, trauma processing, domestic violence, and online counseling.

In addition to her clinical expertise, Andrea Hamilton has served as an adjunct professor and leader in clinical operations, further demonstrating her dedication. She is committed to delivering accessible, high-quality care tailored to the unique needs of her clients.

Marsha Wheatley, MD

Staff Psychiatrist

What has motivated Dr. Wheatley over the course of her career as a caregiver? Dr. Wheatley is a native Houstonian who grew up in a working-class community. Through curiosity and hard work, she was able to attend a university that included people of vastly different life experiences. She was molded by both communities to appreciate the commonalities of humanity. That broad exposure extended her empathetic spectrum to grasp the needs of the American diaspora.

Dr. Wheatley uses a biopsychosocial approach to evaluate the patient. She gathers patient history with a mindset that considers the neuroscience that chemically shapes mood, thoughts, and behavior. She is able to uncover factors that can inhibit psychological growth and development. She has experience in seeing how the social conditions of the “then” can influence the resiliency of the “now”. Dr. Wheatley appreciates, and is proficient in, advances in technology, but prioritizes the analog relationship between doctor and patient.

Meeting people where they are. It is an old trope, but describes how one allows a patient to set the path forward. An open-ended interview is conducted with an open mind towards resolution. When being evaluated and treated by Dr. Wheatley, a patient can expect to be met in a cordial but professional manner. Treatments are discussed and considered based on the mental state of the patient and the clinical efficacy and scientific evidence of benefit. The patient is invited to ask questions and consider whether they wish to pursue the suggested treatment plan.

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Michael Fiori, MD

Staff Psychiatrist

Dr. Michael Fiori is Board Certified in Adult Psychiatry and Addiction Medicine. He has practiced general psychiatry for 37 years, and has also sub-specialized in Addiction Psychiatry for the past 20 years. Dr. Fiori's practice emphasizes Diagnostic Clarification, which is an ongoing process. He is highly trained and experienced in the biological and psychosocial underpinnings of psychiatric problems. He typically follows diagnostic evaluations with 30-minute follow up visits for medication adjustments and brief therapy. Dr. Fiori often enjoys collaborating with outside therapists when needed. Dr. Fiori graduated from Amherst College and received his medical degree from NY Medical College. He subsequently completed his residency in psychiatry at the Mount Sinai Medical Center in NYC. He excelled in Academic Psychiatry as both a teacher and a mentor. His practice has always combined medications with evidence-based therapies to alleviate suffering and maximize functioning. In addition to his work as a Board Certified Adult Psychiatrist, he has specialized in helping patients suffering from Substance Use Disorders. Dr. Fiori is Board Certified in Addiction Medicine, and helps patients understand the interrelationships between their Substance Use Disorders and their Psychiatric illnesses.

Nudedrose Guirand, LMHC

Staff Licensed Mental Health Counselor

LMHCNudedrose Guirand, also known as Rose Guirand, is a Licensed Mental Health Counselor in New York City who has been practicing since 2017. Rose has worked directly with clients of various demographics such as people with disabilities and neurodivergent people living with a variety of mental health conditions for 6 years. She graduated with a Master of Science in Education, Mental Health Counseling at Hunter College of The City University of New York. During her studies, she attended an internship at Boston Road Medical Center, Psychiatry Department in Bronx, New York. Rose's central approach to therapy is eclectic and based on the needs of each client. She frequently uses person-centered, Strength-based, and collaborative therapy. Also, she enjoys using CBT, ACT and DBT which draw upon the whole person and their intrinsic qualities and talents to forge a thriving way of life. Essentially, Rose likes to empower clients to find their passion and set their goals not only to survive but also to thrive in life. Rose enjoys helping people on their journey and sees the rewards of clients winning themselves back. Rose's work as a therapist comes from the heart and holistic space, and being there for her clients truthfully and inspiring them to become the expert of their lives.

Giselle Brito, MD

Staff Psychiatrist

Dr. Giselle Brito is board-certified in adult psychiatry and has been practicing for over 4 years. She received her medical degree from San Juan Bautista, School of Medicine in Puerto Rico and continued her medical education at Jackson Memorial Hospital & University of Miami Hospital for her 4-year psychiatry residency training program. After completing her training, Dr. Brito worked at the Miami Veterans Affairs Hospital and then the Orlando Veterans Affairs Hospital in the primary care mental health integrated model. Dr. Brito also holds certification in Perinatal Mental Health. Dr. Brito's practice focuses on medication management and supportive psychotherapy in typically 30-min follow up visits. At times, additional psychotherapy is needed and a therapist may be added to provide the best outcome.‍

Elizabeth Tiffany, MD

Staff Psychiatrist

Dr Elizabeth Tiffany is a compassionate psychiatrist who is boarded in psychiatry, addiction, and addiction medicine. She completed her residency in Psychiatry and Fellowship in Addiction Psychiatry at the University of Cincinnati in Ohio. Since completing fellowship in 2016, she has held several positions with the Department of Veterans' Affairs treating veterans with addictions and other mental health conditions. She has also worked for the University of Cincinnati providing psychiatric and addictions treatment to those admitted to the hospital for other medical concerns. She is passionate about education and was the addiction psychiatry fellowship director at both Oregon Health and Science University and University of Cincinnati, assisted in training general psychiatrists at both programs, and has given talks to physicians in various specialties to promote treatment of mental health concerns. While considered a well-rounded psychiatrist who enjoys working with patients from a variety of backgrounds and situations, she has extensive experience working with patients who have experienced trauma and those who have psychiatric concerns and may be using more alcohol or cannabis than they would prefer. Dr Tiffany is a personable, nonjudgmental psychiatrist who will collaborate with you to develop a personalized treatment plan that combines medication management with psychotherapeutic tools for a more whole person approach to your recovery.

Lauren Treharn, PMHNP

Staff Nurse Practitioner

Lauren is a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) who earned her Masters of Science in Nursing from Kent State University in 2020. Lauren has experience treating patients with depression, anxiety, psychotic disorders, bipolar, ADHD, OCD, PTSD and substance abuse.

Lauren’s approach integrates both medication management and psychotherapy, creating a balanced treatment plan. She takes the time to listen to concerns, creating a safe space for open dialogue. Lauren utilizes supportive therapy, motivational interviewing, and cognitive behavioral therapy in her sessions. Lauren knows that medication alone often isn't enough to fully address the root causes of distress. With a laid-back, non-judgmental, and empathetic approach, she collaborates with you to build a comprehensive treatment plan that may include talk therapy, lifestyle modifications, stress management, self-care, supplements, and social health. Every decision is rooted in evidence-based practices and patient-centered care, ensuring that your treatment is tailored to your unique needs and goals.

Lauren will conduct a thorough initial assessment, gathering detailed information about your mental and physical health history, lifestyle, symptoms, concerns, and goals. This information guides a potential diagnosis, which then serves as the foundation for creating a personalized treatment plan with regular follow-up appointments to track progress, make any necessary adjustments, and receive ongoing support.

Michelle Vasquez, LPC

Staff Therapy

Michelle E. Vásquez has been a Licensed Professional Counselor for over 27 years. She has been specializing in grief work since 2012. Many of her clients are living with the loss of loved ones or experiencing other types of non-death loss, such as divorce, job loss, and other significant life changes. Her primary goal is to truly listen to your experience and help you work through it, creating a plan of action together. It is your therapy, and your active involvement is crucial. When dealing with grief, you may still be in pain and need to talk about it long after others want you to stop talking. This is when therapy can be helpful. Your grief journey is at your pace. Michelle uses Cognitive Behavioral Therapy and Solution-Focused Therapy, along with other approaches that help you address loss and trauma in unique ways to begin to write your healing story. She has also worked with domestic violence survivors and child abuse survivors. Michelle works with clients both in English and Spanish and has experience with immigrant populations from many countries. Michelle graduated from Our Lady of the Lake University in 1993. She is currently studying Internal Family Systems Therapy to help her provide you with new ways to address the challenges that bring you to therapy.

Maralys Colon Betancourt, MD

Education and training

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