Our Providers

Meet Our Providers, a team of licensed, highly qualified therapists and mental health professionals dedicated to delivering compassionate, evidence-based care tailored to your unique needs. Learn more about their expertise, experience, and commitment to helping you achieve lasting emotional wellness and a healthier, more fulfilling life.

Codie Jordan Vassar, MD, MS

Board-Certified Adult Psychiatrist & Medical Director

Codie Jordan Vassar, MD, MS, is a highly dedicated, board-certified adult psychiatrist and the founder and medical director of Raha Behavioral Health, a premier physician-led outpatient psychiatric practice serving patients across Texas. Throughout his diverse clinical career, he has specialized in delivering comprehensive evaluations, individualized medication management, and ongoing treatment planning to help adults navigate their most complex psychological landscapes.

Clinical Philosophy & Approach

Dr. Vassar’s practice is grounded in the belief that true healing occurs when a patient is met with absolute warmth, authenticity, and respect. Recognizing that entering psychiatric care requires profound courage, he prioritizes the creation of a secure, collaborative, and trauma-informed therapeutic alliance.

His clinical model is deeply culturally responsive, seamlessly blending advanced medical science with human empathy. Rather than offering “one-size-fits-all” prescribing, Dr. Vassar emphasizes careful listening, clear explanations, and shared decision-making. By integrating these frameworks, he ensures that patients deeply understand their clinical options, bridge the gap between diagnosis and treatment, and participate confidently in their own care.

Areas of Clinical Specialization

With a broad and rigorous clinical footprint spanning outpatient, integrated-care, addiction, emergency, consultation-liaison, and telepsychiatry settings, Dr. Vassar guides patients through a wide range of psychiatric challenges, including:

Diagnostic Clarification & Evaluation: Taking the time to accurately identify underlying conditions and systemic factors, ensuring that subsequent treatment plans are built on a precise and thorough medical understanding.
Anxiety and Mood Optimization: Providing targeted, evidence-based medication management to help patients break free from chronic worry, panic, and depressive cycles, thereby restoring emotional regulation.
Trauma & Stress-Related Care: Utilizing trauma-informed psychiatric principles to walk gently alongside individuals as they process acute or historical trauma and navigate profound life transitions.
Dual Diagnosis & Addiction Support: Drawing on his specialized background in addiction settings to safely and compassionately support patients managing co-occurring mental health and substance use challenges.

Empowering Modern, Accessible Care

Dr. Vassar’s exceptional clinical perspective is uniquely enriched by his academic background. He earned his Doctor of Medicine (MD) and completed his adult psychiatry residency at the Medical College of Wisconsin. Driven by a passion for improving how healthcare is delivered, he also earned a Master of Science in Clinical Informatics from the University of Wisconsin–Madison. This specialized technological expertise allows him to leverage modern, streamlined systems to make high-quality telepsychiatry more accessible and efficient for his patients.

Dedicated to breaking down barriers to treatment, Dr. Vassar is fully bilingual and proudly offers comprehensive psychiatric care in both English and Spanish. His ultimate objective is to equip his patients with the psychiatric stability, clarity, and internal resources necessary to step out of survival mode and into a state of authentic, lasting functional independence.

Hafsat Gambari, MSN, PMHNP-BC

Clinical Philosophy & Lifespan Advocacy

Hafsat Gambari, MSN, PMHNP-BC, is a highly accomplished, Board-Certified Psychiatric-Mental Health Nurse Practitioner with more than a decade of diverse clinical nursing experience. Throughout her distinguished career, Hafsat has dedicated herself to supporting the mental wellness of individuals across their entire lifespan, with a specialized focus on children, adolescents, and adults navigating complex psychiatric needs.

Hafsat’s clinical philosophy is rooted in compassion, collaboration, and evidence-based practice. Having served patients across some of the most challenging and high-acuity landscapes in medicine, she understands that mental health is not merely the absence of illness, but the presence of emotional resilience, functional stability, and personal growth. She approaches every patient without judgment, creating a therapeutic sanctuary where individuals feel deeply heard, clinically validated, and actively empowered on their path to recovery.

An Elite & Multi-Disciplinary Professional Journey

Hafsat’s academic foundation began at Western Governors University, where she earned her Bachelor of Science in Nursing (BSN). Driven by a passion for the complexities of brain chemistry and behavioral health, she pursued advanced clinical training at Walden University, graduating with her Master of Science in Nursing (MSN) specializing as a Psychiatric-Mental Health Nurse Practitioner.

Her professional trajectory is marked by an exceptionally rich and multi-disciplinary background. Hafsat has accumulated over ten years of clinical experience across inpatient, outpatient, and hybrid telehealth settings, as well as highly specialized domains:

High-Acuity & Forensic Psychiatry: Managing complex psychiatric presentations, stabilizing acute crises, and navigating the intersection of legal and clinical mental health.
Competency Restoration Services: Providing specialized, evidence-based interventions to restore cognitive and legal capacity for individuals within forensic systems.
Detox & Substance Use Medicine: Guiding patients safely through the physical and psychological complexities of withdrawal, detoxification, and long-term sobriety.
ECT Perioperative Support: Offering specialized clinical care and monitoring for patients undergoing Electroconvulsive Therapy (ECT).

Hafsat’s exceptional clinical acumen and leadership have earned her formal recognition, including a prestigious Certificate of Excellence for her outstanding performance in competency restoration services. Furthermore, her passion for systems-level improvement is reflected in her active participation in clinical advisory committees, where she collaborates to refine protocols, elevate safety standards, and improve patient outcomes.

Expertise & Clinical Focus

In her active practice, Hafsat integrates comprehensive psychiatric evaluations, meticulous medication management, and supportive, trauma-informed therapy. Her clinical focus includes:

Mood and Anxiety Disorders: Utilizing modern psychopharmacology to treat severe depression, panic, generalized anxiety, and bipolar presentations.
Trauma & PTSD Recovery: Implementing trauma-sensitive care models to help children and adults process profound emotional wounds and reclaim their lives.
Neurodevelopmental & Psychotic Disorders: Providing tailored support and pharmacological optimization for individuals managing ADHD, executive dysfunction, and schizophrenia-spectrum disorders.
Co-Occurring Substance Use Conditions: Designing dual-diagnosis treatment protocols that address both the underlying psychiatric illness and the cycle of addiction simultaneously.

A Lifelong Commitment to Clinical Excellence

As a board-certified Psychiatric-Mental Health Nurse Practitioner, Hafsat remains deeply committed to continuous professional growth and clinical excellence. She actively engages in advanced clinical training, monitors emerging neuropsychiatric research, and reviews evolving evidence-based modalities to ensure her practice remains at the absolute forefront of contemporary psychiatric science. Hafsat is dedicated to helping individuals and families build stronger emotional bonds, dismantle mental health stigma, and achieve lasting, sustainable recovery together.

Anwara Adjassa, PMHNP-BC

Board-Certified Psychiatric Mental Health Nurse Practitioner

With over eight years of frontline medical experience, Anwara Adjassa is a Board-Certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) dedicated to delivering thoughtful, highly personalized mental health care. Having successfully navigated the complexities of patient care across psychiatric units, high-acuity emergency departments, medical-surgical floors, telemetry, oncology, and long-term care facilities, she brings a robust clinical foundation and a deeply compassionate approach to every patient she serves.

The Whole-Person Clinical Philosophy

Anwara operates on the core belief that seeking mental health care is a profoundly personal and meaningful step. Drawing upon her extensive background in intensive medical settings, she possesses a rare, holistic vantage point. Having cared for patients facing severe physical illnesses, chronic pain, and acute medical emergencies, she understands exactly how physiological stress and physical trauma directly impact psychological well-being. This allows her to treat the whole person, seamlessly bridging the gap between physical health and mental stability.

Areas of Clinical Focus

Anwara deliberately moves away from rushed, purely clinical models of care, instead creating a welcoming, discreet, and judgment-free sanctuary. She specializes in guiding patients through a variety of psychological challenges, with a clinical focus that includes:

Mood & Emotional Regulation: Providing targeted, empathetic care to help patients manage anxiety, depression, and daily life stressors, restoring emotional balance.
Medical-Psychiatric Integration: Utilizing her extensive medical-surgical and oncology background to support individuals whose mental health is impacted by chronic illness, chronic pain, or severe physical trauma.
Life Transitions & Stress Management: Walking gently alongside patients as they navigate difficult life changes, helping them build confidence and internal coping mechanisms.
Comprehensive Diagnostics: Taking the time to deeply listen and accurately evaluate each patient’s unique mental health needs in a secure and respectful environment.

Collaborative Medication Management

In her psychiatric practice, Anwara believes that effective care requires more than just prescribing medication; it requires profound empathy and a true partnership. She combines rigorous, evidence-based psychopharmacology with active, attentive listening. Rather than dictating care, she collaborates directly with her patients, tailoring every treatment and medication plan to align perfectly with the individual’s unique lifestyle, values, and personal goals.

Empowering Lasting Resilience

Above all, Anwara is passionate about equipping her patients with the tools they need to transition from simply surviving to truly thriving. Her ultimate clinical mission is to ensure that every individual feels genuinely heard, respected, and valued. By fostering confidence and providing unwavering support, Anwara empowers her patients to achieve greater psychological clarity, reclaim their personal narrative, and move forward toward a healthier, more fulfilling life.

Elizabeth Kimani, APRN, FNP-BC, PMHNP-BC

Dual Board-Certified Advanced Practice Registered Nurse

With over 15 years of dedicated nursing experience and more than five years of advanced practice as a Nurse Practitioner, Elizabeth Kimani is a dual board-certified Advanced Practice Registered Nurse (APRN) specializing in both Family Practice (FNP) and Psychiatric-Mental Health (PMHNP). This rare and highly sought-after combination of credentials allows her to deliver truly integrated, holistic healthcare, bridging the critical gap between complex medical conditions and psychological well-being.

The Mind-Body Clinical Philosophy

Elizabeth Kimani operates on the foundational belief that mental and physical health do not exist in isolation. Psychiatric symptoms are often deeply intertwined with physiological issues, and vice versa. Drawing upon a robust background in family medicine, she possesses the unique clinical insight to identify when a medical issue may be masking as a psychiatric symptom, ensuring patients receive accurate diagnoses rather than just symptom management. This comprehensive perspective allows for the independent assessment, diagnosis, and management of patients across the entire lifespan from childhood through late adulthood.

Areas of Clinical Specialization

Providing accessible, high-quality care through both traditional outpatient and modern telehealth settings, Elizabeth specializes in treating a wide spectrum of psychiatric and psychological challenges. Her clinical focus includes, but is not limited to:

Mood & Anxiety Disorders: Providing targeted relief for major depression, generalized anxiety, panic disorders, and bipolar spectrum disorders.
Trauma-Informed Care: Offering a safe, sensitive approach to managing PTSD and stress-related conditions.
Complex Diagnostics: Managing psychotic disorders and co-occurring substance use disorders with clinical rigor and deep empathy.
Chronic Disease Management: Integrating the management of chronic medical conditions that directly impact mental health, well-being, and treatment efficacy.

Evidence-Based Medication Management

When it comes to psychopharmacology, Elizabeth Kimani is exceptionally thorough. She prescribes and monitors psychotropic medications with a strict focus on patient safety, evidence-based guidelines, and long-term stabilization. Rather than a “one-size-fits-all” approach, medication management is highly collaborative. Elizabeth takes the time to educate patients on their clinical options, ensuring they feel empowered and comfortable with their treatment plan, with the ultimate goal of maximizing symptom improvement while minimizing side effects.

Compassionate, Accessible Care

Extensively experienced in remote care delivery, Elizabeth Kimani utilizes modern telehealth platforms to break down barriers to access, bringing elite-level psychiatric care directly to patients in the comfort and privacy of their own homes.

Above all, Elizabeth is dedicated to providing compassionate, stigma-free, and highly individualized care. By addressing the whole person—mind and body—she equips patients with the medical stability, psychological clarity, and resilience necessary to thrive.