Thayanne Delima-Tokarz, DO

Staff Psychiatrist
Languages
English
Portuguese
Spanish
Conditions Treated
Anxiety
Bipolar Disorder
Depression
LGBTQIA+
Obsessive-compulsive disorder (OCD)
PTSD/Trauma
Perinatal Psychiatry
Postpartum Depression
Child/Adolescent

Education and training

• Nova Southeastern University, College of Osteopathic Medicine, DO

Get to know

Thayanne Delima-Tokarz, DO

Dr. Delima-Tokarz is double Board Certified in Psychiatry and Lifestyle medicine. She completed her psychiatry residency training at the University of Maryland/Sheppard Pratt, where she served as the chief resident. She has practiced in various settings over her career, including working for the Department of Defense, private practice, and community mental health. Dr. Delima-Tokarz is fluent in Portuguese, English, and Spanish. Dr. Delima-Tokarz has more than five years of experience treating patients with anxiety, depression, PTSD, Bipolar, OCD, ADHD, and other mental health issues. She employs pharmacotherapy along with supportive therapy and integrative approaches. Dr. Delima-Tokarz is currently working on completing her Ph.D. in Integrative Medicine and is passionate about a holistic and integrative approach to mental health. Her philosophy includes a healing-oriented approach that considers the whole person, including all lifestyle aspects. Dr. Delima-Tokarz aims to provide collaborative and comprehensive care, which may include medication management, lifestyle interventions, stress reduction techniques, and other integrative approaches. She believes building a strong therapeutic relationship where the patient feels empowered is the key to healing.‍

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Mary Phelps, DO

Staff Psychiatrist

Dr. Phelps is a board-eligible adult psychiatrist. She was elected chief resident by her residency program at the University of Central Florida. She obtained her medical degree at Nova Southeastern University. She graduated magna cum laude with a bachelor's degree in Kinesiology from Louisiana State University. Dr. Phelps believes in patient-centered care and a holistic approach to medicine. Her practice focuses on medication management, in conjunction with supportive therapy in 30-minute follow-up visits. If additional therapy is needed, she utilizes referrals to psychotherapists to enhance management of mental illness and provide the best treatment outcomes. Dr. Phelps has worked in a variety of medical settings with different patient populations, including outpatient, consult liaison, and inpatient psychiatry. Her primary focus is treating adults with depression, anxiety, ADHD, insomnia, and bipolar disorder. Dr. Phelps aims to build a strong therapeutic relationship and improve the quality of life of her patients.

Alexandra Baluna, MD

Staff Psychiatrist

Background and credentials  

Dr. Alexandra Baluna, MD, is board-certified by the American Board of  Psychiatry and Neurology. She received her medical degree from  LSUHC-Shreveport and completed her psychiatry residency training at  Montefiore/Albert-Einstein College of Medicine, where she served as chief of  the Consultation-Liaison (C/L) service. Following residency, Dr. Baluna  served as Senior Chief, during which she was honored with the Leo M. Davidoff  Award for Outstanding Achievement in the Teaching of Medical Students. Her  professional experiences include roles at Fordham University, Albert Einstein  Student Mental Health Counseling Center, and most recently, as an outpatient  psychiatrist at Maimonides Medical Center, where she enjoyed teaching and  supervising residents.  

 

Treatment approach  

Dr. Baluna emphasizes creating a warm, empathic, and nonjudgmental  therapeutic environment. She collaborates closely with patients to develop  personalized treatment plans that consider cultural, biological,  psychological, and social factors. With a strong interest in psychotherapy,  she frequently employs ego-supportive and insight-oriented therapy techniques  during follow-up sessions.  

 

What you can expect in a first visit    

During an initial visit, patients can expect a welcoming and supportive  atmosphere where Dr. Baluna conducts a comprehensive assessment. This  involves exploring the patient's history, current challenges, and individual  circumstances. The goal of the first session is to collaboratively build an  individualized treatment plan tailored specifically to the patient's unique  needs.  

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 speciualize in  medication management and collaborate with you on a treatment plan that fits  your needs and comfort level.

Catherine Cashman, DO

Staff Psychiatrist

Background and credentials    

Dr. Catherine Cashman is triple board-certified by the American Board of  Psychiatry and Neurology in Adult Psychiatry, Child & Adolescent  Psychiatry, and Forensic Psychiatry. She holds two Bachelor’s degrees: one in  Finance from New York University, and another in Biology from the University  of New Orleans. She earned her medical degree from Nova Southeastern  University and completed an Adult Psychiatry residency at LSU Health Sciences  Center in New Orleans. Dr. Cashman subsequently completed two fellowships:  the first in Child & Adolescent Psychiatry at LSU New Orleans, along with  a certification in Infant Mental Health (working with children ages 0–6 years  and their caregivers); the second fellowship was in Forensic Psychiatry at  the University of Rochester and the Rochester Regional Forensic Unit.    

Treatment approach    

Dr. Cashman brings an extensive and specialized skillset to psychiatry,  informed by her triple board-certifications. Her treatment approach  integrates clinical expertise from adult, child and adolescent, and forensic  psychiatry, emphasizing accurate diagnosis, risk assessment, and  evidence-based care. With specialized expertise in forensic psychiatry and  competency assessments, she employs rigorous evaluation methods to accurately  inform treatment planning and risk management, particularly in complex or  legally-involved cases.    

What you can expect in a first visit    

Patients visiting Dr. Cashman for the first time can expect a detailed and  comprehensive psychiatric evaluation. Given her forensic and clinical  experience, initial assessments are thorough, focusing on clear diagnostic  understanding, individualized risk assessment, and appropriate treatment  planning. Patients can anticipate a collaborative, professional, and  structured environment aimed at clarifying diagnoses and addressing their  unique mental health needs effectively.    

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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.

Brittney Colf, LMHC

Staff Licensed Mental Health Counselor

Brittney is a Licensed Mental Health Counselor in the State of New York. She attended SUNY Buffalo where she obtained a Bachelor's in Psychology and a Master's in Education with a Certificate of Advanced Study in School Counseling and a Certificate of Advanced Study in Mental Health Counseling. Brittney started her career as a School Counselor before transitioning full-time to Mental Health Counselor. Brittney is an empathetic and open-minded clinician, striving to meet her clients where they are, build trust, and maintain a safe, non-judgmental environment. She is experienced and passionate about working with teens and adults with various forms of trauma. Additionally, Brittney utilizes SPACE (Supportive Parenting for Anxious Childhood Emotions) for families impacted by anxiety and OCD to help them understand the impact these experiences have on their lives, ultimately finding the resolutions and outcomes they hope for. While EMDR therapy is her primary treatment approach for individuals, or SPACE for families, she also utilizes ACT, Parts Work, Motivational Interviewing, CBT, and others.

Margaret Ngumi, PMHNP

Staff Psychiatrist

Margaret Ngumi, MSN, APRN, FNP-C, PMHNP-BC, is a dual board-certified Psychiatric Mental Health and Family Nurse Practitioner with over 20 years of experience in healthcare. She began her career as a Family Nurse Practitioner before recognizing the urgent need for accessible mental health services. This led her to pursue a post-master’s certification in psychiatry, allowing her to provide comprehensive psychiatric care. Margaret has extensive experience treating patients in both inpatient and outpatient settings, addressing conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

Margaret believes in a collaborative, patient-centered approach to mental health care. She strives to create a safe and supportive space where patients feel heard and empowered to take an active role in their treatment. With a strong emphasis on holistic care, she considers all aspects of a patient’s well-being, including lifestyle, relationships, and overall health. Whether through medication management, therapy, or lifestyle modifications, she is committed to helping patients achieve meaningful and lasting improvements in their mental health.

Margaret begins with a comprehensive psychiatric evaluation to understand each patient’s history, concerns, and treatment goals. She then works closely with them to develop an individualized care plan that may include medication management, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure that treatment remains effective and evolves with each patient's needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping patients find balance and improve their overall quality of life.

Ann Landowne, MD

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Dr. Ann Landowne is Board Certified in Adult, Adolescent, and Child Psychiatry. She has over thirty-five years of experience helping people of all ages cope with a wide range of problems. Dr. Landowne received her medical and psychiatric training at Albert Einstein College of Medicine and advanced training in psychotherapy at the Psychoanalytic Association of New York where she is on the faculty. She focuses on medication management and is holistic in her approach to people and the difficulties they face in life. She has expertise in the treatment of children and adolescents with emotional and behavioral problems, and people struggling with anxiety, depression, bipolar disorder, obsessive-compulsive symptoms, and eating disorders.�

Mark Varela,MD

Staff Psychiatrist

Dr. Mark Varela is a board-certified psychiatrist joining Talkiatry directly out of residency. He focuses primarily on medication management, often accompanied by brief cognitive, motivational, or supportive therapy. He may request that you also meet with a therapist regularly for your benefit. Dr. Varela received his medical degree and general psychiatric residency training both from Texas Tech University Health Sciences Center in West Texas. He treats young adults and adults with a wide variety of mental health concerns, including ADHD, mood disorders, anxiety, OCD, and PTSD.

Jason Melia, LMHC

Staff Therapist

Jason is a Licensed Mental Health Counselor with a Master of Science degree in school counseling, a registered Yoga Instructor, Certified in Neuroscience and Yoga in the Treatment of Complex, Developmental, or Repeated Trauma. Jason has over 15 years' experience providing mental health; case management, social work, yogic practice and philosophy, meditation, mindfulness, holistic wellness and wellbeing.  Jason is deeply committed to helping individuals navigate the complexities of life, build emotional resilience, and find pathways to healing. Jason’s work is grounded in evidence-based practices, including Cognitive Behavioral Therapy (CBT), mindfulness techniques, and person-centered therapy to meet the unique needs of each individual.

Jason believes in the importance of building a therapeutic relationship based on trust and respect, where you feel heard and understood. Each session is tailored to your needs, and together we will set goals that align with your values and aspirations. Together we can begin helping you become the happy, joyous and free person you were meant to be.

Jason uses a holistic, client-centered approach that emphasizes understanding and growth, aiming to empower clients to develop coping skills and healthier thought patterns. Whether you are facing a specific challenge or seeking personal development, Jason’s goal is to support you in creating lasting change and enhancing your overall well-being.

Ioana Horotan-Enescu, DO

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Dr. Ioana Horotan-Enescu is a board-certified Psychiatrist. Before joining Talkiatry, she was an Active-Duty staff psychiatrist at Blanchfield Army Community Hospital, Fort Campbell, KY. Her military service also included roles such as Medical Director of Behavioral Health and Interim Clinic Chief for Embedded Behavioral Health Clinic. She completed her internship and residency at Walter Reed National Military Medical Center and earned her Doctor of Osteopathy Degree from the University of New England College of Osteopathic Medicine. Her clinical experience spanned from the inpatient to the outpatient setting and afforded her the opportunity to develop comprehensive skills in the treatment of PTSD, mood disorders, thought disorders, addiction and perinatal mood disorders. Her teaching experience spanned multiple institutions, where she has served as a preceptor and mentor for medical students, nurse practitioner and physician assistant students. In addition to medication management, she augments her practice by implementing mindfulness, psychodynamic and supportive therapy techniques in her everyday practice to enhance treatment and improve treatment response. Dr. Horotan-Enescu holds several certifications, including in Cognitive Behavioral Health Therapy for Suicide Prevention, Motivational Interviewing and Battlefield Acupuncture. She has delivered presentations at national and international conferences on various topics, reinforcing her commitment to advancing the field of psychiatry.

Sheena Mammen, LCSW

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Sheena Mammen is a Licensed Clinical Social Worker with seven years of experience in various aspects of mental health. She earned her undergraduate degree from Nyack College and her Master's from Stony Brook, which deepened her understanding of the field. She specializes in treating clients with anxiety, depression, ADHD, interpersonal issues, and perfectionism. Sheena employs culturally sensitive and person-centered approaches to tailor treatments for each individual. Her eclectic therapeutic style is rooted in Cognitive Behavioral Therapy, Dialectical Behavioral Therapy, and Attachment Therapy. She also incorporates communication skills, mindfulness, executive functioning, and social skills training into her sessions, fostering comprehensive support for her clients.

Shilpika Varma, MD

Staff Psychiatrist

Dr. Varma grew up in an immigrant family surrounded by aspiring doctors, and her passion for understanding the human mind and behavior blossomed early. This curiosity led her to pursue extensive medical training abroad, beginning at Kasturba Medical College in Southern India, followed by clerkships at the University of the West Indies in Trinidad and Tobago. She completed her Adult psychiatry residency at the University of Florida in Gainesville and specialized further with a child/adolescent fellowship at Brookdale University Hospital in Brooklyn, NY.

Dr. Varma believes in a holistic, integrative approach to mental health. Her philosophy centers on identifying the root causes of ailments rather than merely addressing symptoms. She views mental health care as a partnership, where the mind, body, and spirit work together to achieve wellness. Dr. Varma is committed to fostering a safe, confidential therapeutic alliance to help you explore your potential for healing.

Dr. Varma embraces integrative psychiatry, which combines the best of conventional Western medicine with complementary approaches. This involves a comprehensive biopsychosocial assessment tailored to each individual, incorporating psychopharmacology alongside lifestyle adjustments in diet, movement, and breathwork. She collaborates with therapists and other professionals to create a well-rounded treatment plan that honors your unique journey.

Lauren Mingle, LPC

Staff Therapist, Clinical Lead

Lauren Mingle is an outpatient therapist at Talkiatry. She is dually licensed in Colorado as a LPC (Licensed Professional Counselor) and LMFT (Licensed Marriage and Family Therapist). Lauren earned her master's degree in Marriage, Couples, and Family Counseling/Therapy from the University of Northern Colorado. Before joining Talkiatry, Lauren held roles in a diverse array of settings including community mental health, crisis services, and outpatient therapy. Her previous specialty focuses included youth, adolescents, adults, and couples. Lauren uses a variety of evidence-based approaches including, but not limited to, Cognitive Behavioral Therapy, Person-Centered Therapy, Dialectal Behavioral Therapy, and Motivational Interviewing to meet people where they are at and work with them to best reach their personalized therapy goals.

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