Kristofer Joondeph-Breidbart, MD

Tiffany Chaille is a board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP) with nearly a decade of clinical practice and over 15 years of experience working in behavioral health. Her background includes inpatient and outpatient psychiatry, crisis-focused care, community mental health, integrated pain and psychiatry care, and telepsychiatry. She has a growing interest in functional and integrative approaches to mental health. Tiffany earned her Master of Science in Nursing as a PMHNP from Indiana University and her Bachelor of Science in Nursing from Indiana State University.

Tiffany believes mental health care is most effective when patients feel comfortable, supported, and truly heard. She takes a calm, compassionate, and nonjudgmental approach, meeting patients where they are. Her care focuses on practical, real-life treatment plans while considering sleep, stress, medical factors, and lifestyle influences. She values collaboration and aims for patients to feel informed, involved, safe, and confident throughout their care.

Tiffany begins by getting to know the person beyond the symptoms and understanding what brought them to care. She works collaboratively to develop individualized, realistic treatment plans using evidence-based medication management. Ongoing follow-up, thoughtful adjustments, clear communication, and a whole-person approach guide her work, with an emphasis on consistency and long-term support.

Dr. Allison Holt is an experienced, board-certified child, adolescent, and adult psychiatrist who has worked in mental health care in a variety of settings, including health care administration, academia, inpatient psychiatry, private practice outpatient care, forensic and disability evaluations, correctional psychiatry, eating disorder care, and ECT. Dr. Holt is dedicated to providing patients with a relaxed, trusting environment that encourages dialogue and instills the freedom to pursue healing and growth. With empathy, patience and an approachable style, she helps patients see their future with fresh eyes � and develop a plan that will accomplish their goals for change. While medical expertise forms the foundation of Dr. Holt's treatment, her warmth and a sense of compassion are often key motivating factors for patient change and success. Dr. Holt treats a wide variety of needs and illnesses in children, adolescents, and adults, including depressive disorders, bipolar disorders, anxiety disorders, substance-related and addictive disorders, attention disorders, trauma related disorders, and obsessive-compulsive disorders. Through a patient-centered mix of evidence-based treatments, including medication, psychotherapy, and patient education, she helps her patients understand their options and create appropriate treatment plans that empower them to move toward positive change. Dr. Holt received her medical degree from Ohio State University. She completed a General Psychiatry Residency Program (with extra emphasis in addiction and forensic psychiatry), and a Child and Adolescent Psychiatry Fellowship, at the University of Minnesota. Prior to joining Talkiatry, Dr. Holt was the Physician Chief of the Mental Health and Addiction Service Line at M Health Fairview, the largest provider of mental health care in Minnesota. At the same time she was the Vice Chair of Clinical Affairs at the University of Minnesota Department of Psychiatry. Dr. Holt has been awarded "Top Doctor" by Minneapolis-St. Paul Magazine every year from 2014 to 2022. She was president of the Minnesota Psychiatric Society 2020-2021, and was also the co-editor of the Minnesota Psychiatric Society's newsletter, Ideas of Reference, from 2010-2019.

Dr. Liu is board certified in Adult Psychiatry. She primarily focuses on medication management but integrates therapeutic support into her sessions. For more in-depth therapy needs, Dr. Liu encourages patients to have their own individual therapist. She received her undergraduate and medical degrees at the University of South Carolina in Columbia, SC. She then moved to Morgantown, West Virginia to complete her psychiatry residency. Dr. Liu has experience working with patients from different backgrounds in inpatient, outpatient, and partial hospitalization settings. She particularly enjoys working with young adults and in areas related to women's health, such as perinatal mental health. She welcomes people from all cultures and is LGBTQ+ friendly.

Penny Clark is a Licensed Professional Counselor, who earned her Master of Arts degree in Counseling Psychology at Monmouth University in West Long Branch, New Jersey in 2004. Penny also completed a one-year training to become a Certified Health Coach through the Institute for Integrative Nutrition in New York in 2017. Penny has more than 20 years of counseling experience and has worked with individuals, couples and families, beginning by working with 9/11 displaced workers and recovery workers, including police, firemen and EMTs, and then Hurricane Katrina and Superstorm Sandy families, after which she worked with bereaved military families, homeless veterans, and other homeless men. Penny has done individual, couples, career and relationship counseling. Penny has worked in various levels of care including inpatient, outpatient, intensive outpatient and partial care programs. Penny has answered the National Suicide Prevention Hotline 800-273-TALK, has worked in a psychiatrist’s office, and in her own private practice. Penny also worked at a drug and alcohol detox and rehabilitation program.  Penny has worked with individuals with Depression, Anxiety, PTSD, health and medical challenges, substance abuse, and the specific challenges that seniors face.

Penny provides a safe, therapeutic environment in which clients can share and process their thoughts and feelings, gain insight, and set and reach realistic and achievable goals. Penny’s primary goal is to develop a trusting relationship with her clients and helping them to improve their lives.

Penny uses Cognitive Behavioral Therapy, (CBT,) Positive Psychology, Psychodynamic Therapy, Solution Focused Therapy, Motivational Interviewing, and Psychoeducation while working with clients. Penny enjoys assisting clients in determining where they are and where they would like to be, the steps they need to take to get there, and in identifying and overcoming any obstacles that may be in their way.

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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 and later pursued a post-master’s certification in psychiatry to address the growing need for accessible mental health services. Margaret has extensive experience in both inpatient and outpatient settings, treating conditions such as depression, anxiety, PTSD, mood disorders, and substance use disorders.

She takes a collaborative, patient-centered approach to care, creating a safe and supportive environment where individuals feel heard and empowered. With a strong emphasis on holistic care, Margaret 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 goals. She then works closely with them to develop a personalized care plan that may include medication, therapy, and evidence-based lifestyle interventions. She prioritizes open communication, patient education, and ongoing collaboration to ensure treatment remains effective and evolves with each patient’s needs. Through her compassionate and evidence-based approach, Margaret is dedicated to helping individuals find balance and improve their overall quality of life.

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Dr. Swetha Mummini earned her medical degree from SUNY Downstate Medical Center and completed her psychiatry residency at the University of Maryland/Sheppard Pratt. She has worked across various clinical settings, including inpatient units, residential treatment centers, and substance use disorder clinics. Her clinical interests include mood disorders, OCD, women’s mental health, and eating disorders.

Dr. Mummini takes a holistic approach to mental health, recognizing that there is no one-size-fits-all solution. She thoughtfully integrates medication when appropriate, alongside lifestyle changes, sleep, and stress management. She prioritizes strong therapeutic relationships and uses 30-minute follow-up visits that often include elements of psychotherapy.

In the first appointment, Dr. Mummini gathers a thorough psychiatric history, explores current symptoms, and learns about the patient’s goals. She works collaboratively to develop personalized, evidence-based treatment plans, blending integrative psychiatry with ongoing support for long-term well-being.