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Addiction Treatment Staff

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Zachary Ragan

Facility CEO

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Brian Fuller, MD

Medical Director

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Brandi Weber, FNP-C, PMHMP-BC

Clinical Nurse Manager

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Allison Price, LPC-MHSPN

Program Director

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Lauren Bentley, LCSW

Director of Clinical Operations

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Ashley Oldani, LPC- MHSP

Clinical Director

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Haley Valdez

Office Assistant

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Kayla Cothran

Admissions Manager

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Torrey Sellers

Admissions Specialist

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Kirsten Moussa, LPC- MHSP

Program Director

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Samantha Crites

Admissions Specialist

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David Ward

Transport Manager

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Dolly Southall

Receptionist

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Jennifer Mattio

Director of Business Operations

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Kelly Turner

Behavioral Health Manager

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Landon Collins

Business Operations Specialist

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Melissa Morgan

Equine Manager

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Millie Woods

Housekeeping Manager

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Reba England

Behavioral Health Manager

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Taylor Sullivan

Behavioral Health Manager

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Tonya Barber

Behavioral Health Manager

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Trinea Grimes

Director of Residential Services

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Zachary Ragan

Facility CEO

Zack is the Facility Chief Executive Officer for the Ranch Tennessee and P.A.T.H. Nashville. He is a Licensed Alcohol and Drug Abuse Counselor in Tennessee. He also holds a bachelor’s degree in psychology and his Master of Business Administration from Tennessee State University. Zack has worked in behavioral health for nearly a decade at all levels of care. His specialty is educating, training and developing staff to better serve clients dealing with addiction and mental health disorders. His treatment philosophy incorporates addressing the whole person, not just the disease of addiction or mental health, by treating the person’s body, spirit and soul.

Brian Fuller, MD

Medical Director

Dr. Fuller is board certified by the American Board of Psychiatry and Neurology. He completed medical school at the University of Tennessee Health Science Center and residency at Vanderbilt University. Additionally, he has completed the Nashville Advance Psychodynamic Psychotherapy Program, a two-year intensive program to better integrate traditional psychotherapy into his psychiatric practice. Dr. Fuller began his post-residency career in psychiatry running a psychotherapy-oriented private practice. Looking to help more people than he could working alone yet still provide treatment that emphasizes the importance and value of talk therapy, he joined The Ranch in 2017.


Dr. Fuller is passionate about helping people who have survived trauma and/or are struggling with addiction and strongly believes that the life we all deserve is within reach, no matter the adversity that one must overcome. He views medications as tools rather than solutions and his prescribing philosophy is to use the lowest dose necessary of non-addictive medications to help aid the process of recovery.

Brandi Weber, FNP-C

Clinical Nurse Manager

Brandi Weber, FNP-C is a certified family nurse practitioner providing acute and primary care for our clients. Certified through, and a current member of, the American Academy of Nurse Practitioners, Brandi graduated with her AD in Science from Volunteer State Community College and BSN degree from Tennessee State University. She participated in the nurse residency program at Vanderbilt working in the emergency department and level one trauma center. She obtained her master’s degree for Advanced Practice Nurse at Vanderbilt School of Nursing’s Family Nurse Practitioner program. Previous employment includes Northcrest Physician Services and family nurse practitioner in primary care in Robertson and Cheatham Co for over four years. She later worked for Urgent Team in Springfield, TN in both acute and primary care before coming to The Ranch. “I am very blessed and humbled to be a part of such a compassionate and caring establishment where the client comes first. I am honored to have the opportunity to help the client achieve optimal health during their time of healing and recovery.”

Allison Price, LPC

Program Director

Allison Price is a Licensed Professional Counselor with a Mental Health Service Provider designation. Allison received a bachelor’s degree in psychology from the University of Wyoming and a master’s degree in Community Mental Health Counseling from Chadron State College. She also has an endorsement in School Counseling. Allison has worked in a variety of environments and roles including substance use at all levels, director of social services, inpatient mental health, school counseling, and private practice. All of Allison’s experience has led her to develop a holistic approach to treatment.

Allison was born and raised in Western Nebraska and recently moved to Tennessee. Some of her greatest accomplishments are completing 4 half marathons.

Lauren Bentley, LCSW

Director of Clinical Operations

Lauren is the Director of Clinical Operations for the Ranch Tennessee. She is a Licensed Clinical Social Worker and received her master’s degree from The University of Tennessee College of Social Work. She has a passion for working with individuals who have experienced trauma and is trained in EMDR. Her philosophy includes treating the whole person, not just the disease of addiction or mental health, by treating the person’s body, spirit, and soul. In her spare time, Lauren enjoys practicing yoga, hanging out with her dogs, and traveling with her husband.