Meet the Team
Get to know more about our experienced team including education and credentials
Christopher Fischer , M.D.
Board Certified Psychiatrist
Education
Undergraduate: University of California, Berkeley
Medical School: University of California, San Diego
Adult Psychiatry Residency: University of California, Los Angeles
Child and Adolescent Fellowship: University of Southern California, Los Angeles
Forensic Psychiatry Fellowship: University of California, Davis
Academic Affiliation
Clinical Assistant Professor, Volunteer Clinical Faculty, University of California, Davis
Dr. Christopher Fischer is a triple board-certified Child, Adult, and Forensic Psychiatrist. He is a Clinical Assistant Professor (VCF) in the UC Davis Department of Psychiatry. Dr. Fischer has over 10 years of experience in treating treatment-resistant depression, anxiety, and post-traumatic stress disorder as well as many other mental health conditions.
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Dr. Fischer first became interested in ketamine-assisted psychotherapy when he realized the limitations that traditional oral anti-depressant medications can have in terms of effectiveness and side effects for some patients. After reviewing the evidenced-based research, it became clear to him that ketamine assisted-psychotherapy represented the most significant breakthrough in multiple decades for treatment-resistant mental health conditions.
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Dr. Fischer understands that ketamine therapy is a powerful treatment that must only be recommended after carefully evaluating an individual’s mental health history, indications, and potential for treatment responses. Prior to any treatment, Dr. Fischer conducts a comprehensive psychiatric consultation to understand a patient’s current symptoms, goals of treatment, and diagnoses as he strongly believes that successful treatment outcomes start with an accurate diagnosis and a collaborative treatment plan.
Dr. Fischer looks forward to meeting you in our Sacramento ketamine clinic and helping you recover from depression, anxiety, PTSD, and chronic pain.
Sofia Peeva, M.D.
Board Certified Anesthesiologist
Dr. Sofia Peeva is a Board-Certified Anesthesiologist. She has an expertise in airway management, anesthetic administration for a wide range of operations and medication infusion and titration.
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Dr. Peeva became interested in ketamine while she was a resident in Anesthesia. She has used the medication thousands of times to provide anesthesia in many different settings.
A pivotal moment in Dr. Peeva’s career came when she experienced her own burnout. She emerged from that with a renewed sense of self and a new professional focus in ketamine therapy.
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Dr. Peeva’s commitment to mental health led her to join forces with other like-minded physicians and together they created one of the cutting-edge centers for ketamine assisted psychotherapy called Propel Therapeutics. Witnessing the profound impact of mental health on individuals and their families, Dr. Peeva felt a calling to redefine the narrative surrounding mental well-being.
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In her pursuit of excellence, Dr. Peeva has been at the forefront of groundbreaking new approaches for treatment resistant depression, anxiety, PTSD and chronic pain. Dr. Peeva’s commitment to advancing mental health knowledge extends beyond her clinical practice, as she actively participates in conferences, lectures, and collaborations aimed at shaping the future of psychiatric care.
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Guided by a holistic approach, Dr. Peeva recognizes the symbiotic relationship between mental and physical health. Her integrative model of care acknowledges the importance of collaboration between psychiatric and medical professionals, emphasizing the interconnectedness of mind and body. In an era where mental health is gaining the recognition it deserves, Dr. Peeva stands as a trailblazer, dismantling stigmas and fostering a compassionate, inclusive approach to mental well-being.
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Her therapeutic approach blends evidence-based interventions with a personalized touch, acknowledging the uniqueness of everyone’s journey. Dr. Peeva’s commitment to creating a safe and judgment-free space has earned her the trust and gratitude of her patients. As a physician, researcher, and advocate, Dr. Peeva continues to illuminate the path toward mental well-being.
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Dr. Peeva looks forward to meeting you in our Sacramento ketamine clinic and helping you recover from depression, anxiety, PTSD, and chronic pain.
Education
Undergraduate: University of California, Berkeley
Medical School: Medical College of Virginia (MCV), Richmond
Anesthesia Residency: University of Southern California, Los Angeles
Mackenzie Trenner
Medical Assistant, Office Manager
Hello, my name is Mackenzie, though most people call me Mac, and I am the Medical Assistant and Office Manager at Propel Therapeutics.
I feel deeply honored to be part of a team that provides holistic, transformative care through ketamine-assisted psychotherapy.
Mental health and wellness are my true passions, and my mission is to bring empathy, respect, and unwavering support to every patient who walks through our doors. I understand that seeking therapy is a courageous step, and I am committed to being a trusted ally throughout your healing journey.
I love fostering meaningful, caring relationships and creating an environment where patients feel safe, supported, and seen. I also enjoy making patients laugh—and I like to think I’m quite good at it—because I know that healing is as much about connection, lightness, and joy as it is about treatment.
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At Propel Therapeutics, my role is to be here to guide, support, and walk alongside our patients, helping them feel empowered, cared for, and even uplifted with a smile every step of the way.
Andreina Cheema, LMFT, APCC
Therapist
Ketamine Assisted Psychotherapy
Somatic Therapy
Trauma informed Therapies
PTSD, Anxiety, Depression
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Hello, my name is Andreina Cheema, and I am a holistic psychotherapist. I am passionate about supporting individuals in finding meaning of their ketamine experience and developing awareness and insight gained during their infusion to promote their capacity for healing, growth, and creating positive lasting change in their lives through ketamine integration psychotherapy.
I have 11 years of experience working with individuals who have struggled with life transitions, anxiety, depression, trauma, grief, self-harm, low self-esteem/self-worth, and who solely want to improve their well-being. I take a holistic approach to psychotherapy, honoring the mind, body, and soul. I am trauma-informed and use a culturally sensitive lens. I practice through various modalities and work with individuals to find the approach that fits them best based on their individual needs.
I became interested in ketamine therapy when research showed significant positive outcomes when used to treat treatment-resistant depression, anxiety, PTSD, and chronic pain. My interest turned into excitement when I learned how ketamine supports the process of neuroplasticity in the brain, which increases our ability to change beliefs, thoughts, and behaviors. I realized that ketamine can be a catalyst for change and that with guidance, support, and action, individuals can learn how to propel that change forward to support their healing, growth, and progress during and after their ketamine treatment.
As your integration psychotherapist therapist, my intention will always be to hold a safe, compassionate, non-judgemental space, meet you where you are, and walk alongside you. I currently have the privilege of leading a ketamine integration group and am providing individual integration sessions.
Jackie Noble, RN
Infusion Nurse
Jackie Noble has dedicated her career to helping individuals not only heal physically but also reconnect with the emotional truths that guide their lives. As an infusion nurse and NAD+ specialist at Propel Therapeutics, Jackie brings a unique blend of medical expertise and deep empathy to every session. She believes that true wellness emerges when the body, mind, and heart are cared for together.
From the moment she meets a patient, Jackie creates a space of trust and presence. She listens without judgment and encourages those she works with to explore and honor their emotions, knowing that acknowledging what lies beneath the surface is a powerful step toward transformation. Whether she is administering ketamine or NAD+ infusions, Jackie’s approach is always grounded in the understanding that healing is more than a procedure—it is a journey.
Jackie’s path into infusion nursing was shaped by her fascination with the body’s capacity to heal and the mind’s capacity to change. She has completed specialized training in NAD+ therapy, learning how this innovative treatment can support cellular health, mental clarity, and emotional resilience. Her patients often remark not only on her technical skill but on her ability to make them feel safe, seen, and understood throughout their treatment.
Outside the clinic, Jackie is deeply committed to personal growth and emotional awareness. She regularly practices mindfulness and encourages her patients to explore tools for self-reflection and inner balance. Her approach reflects a belief that even small shifts in perspective can open the door to profound change.
Jackie’s mission is simple yet powerful: to help others reconnect with themselves, release what no longer serves them, and step confidently into their full potential. With her guidance, patients find more than relief—they discover the courage to explore their inner landscapes and embrace the possibilities that arise when body and mind are aligned.
At Propel Therapeutics, Jackie Noble is more than a nurse—she is a compassionate guide, a steady presence, and a partner in every patient’s journey toward healing, self-discovery, and renewed vitality.