Our Team

Having worked together for several years, Kellie Abbee and Aaron Langford formed Advanced Psychiatry on the principles of trust, patient collaboration, and positive outcomes. 

Kellie Abbee

Kellie is a board-certified Psychiatric Mental Health Nurse Practitioner. She holds a Master of Science in Nursing from the University of Texas at Arlington and a Bachelor of Science in Nursing from Baylor University. She has extensive experience in both evaluating and treating a wide range of psychiatric disorders such as depressive disorders, mood disorders, anxiety disorders, attention deficit disorders, chemical dependency and insomnia. She has a particular passion for treating those individuals struggling with severe anxiety and/or severe depression. She established Advanced Psychiatry, PLLC in 2019 in order to provide comprehensive, inclusive, affordable and compassionate psychiatric care in the outpatient setting.

*Kellie works with ages 18-60



Aaron Langford

Aaron Langford is a board certified Psychiatric Mental Health Nurse Practitioner and Certified Addiction Nurse Practitioner. He holds a Doctorate in Nursing Practice and is adjunct and lead faculty for Maryville University’s Psychiatric Mental Health Nurse Practitioner program. He obtained his Baccalaureate and Master of Science in Nursing from the University of Texas at Arlington after initially obtaining an Associate of Science in Nursing from El Centro College. He has experience working in residential treatment facilities, home health, hospice, critical care, telemetry, post-surgery recovery, and inpatient psychiatric treatment units. Given his broad range of experience and dedication to the psychiatric nursing profession, he’s also worked as an expert witness with legal cases pertaining to psychiatric nursing care. He believes patients are the experts of their own lives and experiences and are able to create lives that they love and sometimes need help in doing so. Mutual respect and open communication are critical to treatment relationship, therefore Aaron Langford respects his patients’ time and values their input regarding their treatment plan.


*Aaron works with ages 18-60



Edith Mendoza

Edith is a board-certified Psychiatric Mental Health Nurse Practitioner. She holds a Master of Science in Nursing from the University of Texas at Arlington. She has been in the medical field since 1988, and a Registered Nurse since 1996. Her experience includes family medicine, neonatal intensive care, emergency room and case management. During each of these experiences, Edith noticed that many patients had mental health needs that went unnoticed, and these unmet needs often affected their medical outcomes. This gap in care led her into the field of psychiatry. She combines evidence-based practice with clinical experience, observation and listening in order to meet a patient “where they are” on their mental health journey. She believes that when patients feel heard and respected, they are empowered to view their practitioner as someone who partners with them as they work to improve their mental health. As she helps educate her patients about mental health, she finds that she learns things from her patients as well. This environment of communication and learning helps her find new ways to help others.

*Edith works with ages 18-60

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The team at Advanced Psychiatry knows how important it is to have a good support system in challenging times. Call today to schedule an appointment for yourself or a loved one.

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Advanced Psychiatry, P.L.L.C

2485 E. Southlake Blvd., Suite 100, Southlake, Texas 76092

Office Hours

Monday-Thursday from 7am - 4pm and closed on Fridays.