About The Team at

SANA Psychiatric Associates

About SANA

Guiding Your Mental Health Journey Forward

At SANA, we are more than a mental health clinic, we are a compassionate team of providers deeply committed to guiding individuals toward clarity, connection, and lasting emotional wellness. We walk alongside those who feel stuck, unheard, or overwhelmed by depression, anxiety, trauma, or life’s transitions.

We support individuals facing psychological struggles that leave life feeling fragmented, especially those who haven’t found relief through traditional methods. Many of our patients are battling treatment-resistant depression, chronic anxiety, OCD, or carrying the weight of trauma. Our purpose is to offer real hope through science-backed care, personalized support, and relationships built on trust.

Whether through innovative treatments like Transcranial Magnetic Stimulation (TMS), therapy, or medication management, our mission is simple: to help you reclaim your mind, reconnect with your purpose, and move forward with strength.

We don’t just offer services, we offer transformation. And we do it by honoring your story, not just your symptoms.

Dr. Alice A. Sanchez is a board certified psychiatrist with nearly two decades of clinical experience. She completed her residency at Maimonides Medical Center in New York and further specialized in geriatric psychiatry through a fellowship at NYU. For over 16 years, she’s practiced in Texas, working closely with individuals facing the complexities of the human condition, bipolar disorder, depression, anxiety, PTSD, ADHD, and more.

Fluent in English and Spanish, Dr. Sanchez approaches her work with both precision and empathy. She doesn’t treat symptoms in isolation, she listens, observes, and collaborates to understand the deeper patterns beneath the surface. Her work is a careful balance between structure and compassion, aimed at helping patients regain a sense of order, responsibility, and meaning in their lives.

E. Karina Villegas, MPAS, PA-C brings a wealth of experience and a unique skill set to the table. Exceptional in clinical expertise in diagnosing and treating a wide range of mental health disorders and has a track record of successful collaboration with physicians. Her diverse background spans from specialized psychiatric care at Texas Psychiatry Associates to general family practice at Fulshear Family Medicine. Whether it’s managing complex mental health disorders or navigating the intricacies of women’s healthcare, Karina has done it all.

Christienne Felice Callasan comes with rich experience in psychiatric care, having served as a Psychiatric Nurse Practitioner in locations in Frisco and McKinney, Texas. Her proficiency is rooted in conducting thorough psychiatric assessments, managing cases effectively, and creating considerate treatment plans that are customized for each patient’s unique needs.

Prior to specializing in psychiatry, Christienne dedicated nearly eight years to Texas Health Resources in Arlington. Her journey in mental health care began as a Mental Health Technician, transitioning to a Registered Nurse II, and eventually taking on the role of Charge Nurse in the Behavioral Health Unit. This diverse experience forms the foundation of her patient-centered approach.

Christienne is a proud alumnus of Walden University, where she earned a Master of Science in Nursing (MSN), with a focus on Psychiatric Mental Health (PMHNP). Additionally, her foundational nursing education was completed at La Consolacion College in Manila, where she obtained a Bachelor of Science in Nursing.

Nelson Chiakpo is a Board-Certified Psychiatric Nurse Practitioner graduated from the University of Texas at Arlington. Prior to becoming a PMHNP, he completed a critical care residency at Parkland Memorial Hospital in February 2017 and earned his Bachelor’s Degree in Nursing from the University of Texas at Arlington in June 2016. Nelson worked as a registered nurse in a variety of settings including the ICU, PCU, med-surg, psych, and ER. Nelson is also a veteran of the US Navy.

In his current role as a PMHNP, Nelson provides outpatient mental health care for patients with a range of diagnoses including depression, bipolar disorder, anxiety, sleep disorders, ADHD, and eating disorders. he is experienced in providing medication adjustments and therapy services as needed.

Calen Hawkins is a Licensed Professional Counselor and is certified in EMDR therapy. Calen has worked extensively with adults, teens, and children across a range of settings, including inpatient hospitals, partial hospitalization programs, and outpatient therapy. Her past roles include leadership and clinical positions at Ellie Mental Health, Changes McKinney, Mesa Springs, and MHMR of Tarrant County, where she served as Director of Intake & Access and Program Manager. Currently, Calen is a valued therapist at SANA Psychiatric Associates.

Calen holds a Master’s degree in Professional Counseling from Texas Wesleyan University and a Bachelor of Science in Psychology from Arkansas State University.

Citra Landa is a Certified Clinical Medical Assistant who always goes above and beyond providing patient care. She went to San Francisco State University and got her graduate degree from National Taipei University of Nursing and Health Sciences, Taiwan. Citra trained in various fields including Midwifery, Ob-Gyn, Internal Medicine, and Mental Health. She currently resides in Celina, Texas with her husband and two kids.

Originating from San Salvador, El Salvador, Julissa embarked on a medical career at the Evangelic University of El Salvador, achieving a Doctorate in Medicine. Beginning medical school in 2015, Julissa has shown a deep commitment to healthcare, initially serving as a primary care doctor in El Salvador. Julissa’s professional path includes three years of valuable experience in various hospitals and a significant tenure at a community clinic, where she provided comprehensive care to diverse populations. Currently residing in Carrollton, Texas, Julissa brings a wealth of medical knowledge and a compassionate approach to patient care in the community.

TESTIMONIALS

Patient Reviews

Hands down, Dr. Sanchez has been my absolute favorite mental health care practitioner. She is caring, kind, warm, funny, friendly and a delight to talk to. She came up with some great solutions for me and they worked really well.

M.K.
Patient

Nelson Chiakpo is very knowledgeable about what meditation/treatment routes to follow and has been a great help in my overall mental health success. He is a US veteran and understands struggles such as PTSD, depression, and severe anxiety.

S.R.
Patient

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We offer a wide range of mental health to help individuals and couples with a wide range of mental health issues and life challenges. We can meet face to face or via telehealth.

SANA Psychiatric Associates

Guiding Your Mental Health Journey Forward

Dr. Alice Sanchez

Edna Karina Villegas, PA

Christienne Felice Callasan, PMHNP

Onyebuchi Nelson Chiakpo, PMHNP

Calen Hawkins, LPC

Citra Landa

Julissa Rosales

Patient Reviews

Dr. Alice Sanchez

Nelson Chiakpo, PMHNP

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