San Juan Health Partners Behavioral Health

Meet Our Team


Ariadna Sadziene-Bessinger, MD
Dr. Sadziene-Bessinger attended Vilnius University Medical College. She interned at the University of Medicine and Dentistry of New Jersey, and completed her residency Program at University of Pittsburgh Medical Center Western Psychiatry Institute and Clinics; and a fellowship at University of Pittsburgh Medical Center Western Psychiatry Institute and Clinics. 

She is board certified in General Psychiatry and Geriatric Psychiatry. 


Walter Standridge, MD
Dr. Standridge completed his undergraduate degree at Baylor University in Waco, Texas, where he majored in Chemistry and German. He attended medical school at the University of Arkansas for Medical Sciences in Little Rock. Dr. Standridge completed an Internship in Community Medicine followed by a Psychiatry Residency, both at the University of Colorado Health Sciences Center.

Dr. Standridge is certified by the American Board of Psychiatry and Neurology in Psychiatry. He also holds an Addiction Subspecialty board certification.

Ava Boswell, MD 
Dr. Boswell received a bachelor’s degree in Economics from the University of New Mexico. She completed UNM’s Pre-Medical Enrichment Program and graduated with her Doctor of Medicine from UNM’s School of Medicine. Dr. Boswell completed her residency at the University of New Mexico Hospital, Department of Psychiatry where she was the Chief of Inpatient, Recruitment and Medical Student Education. That was followed by a Fellowship in Child and Adolescent Psychiatry.

Dr. Boswell is a member of the American Medical Association and American Psychiatric Association, as well as a member of the American Academy of Child and Adolescent Psychiatry.


Giselle Ferreira, MD 
Dr. Giselle Ferreira attended Medical School at the University of Rio de Janeiro. Dr. Ferreira completed her General Psychiatry Residency at the University of New Mexico. That was followed by a Child and Adolescent Psychiatry Fellowship, also at UNM, where she was the Chief Fellow.

Dr. Ferreira is fluent in Spanish and Portuguese. Dr. Ferreira’s professional interests include trauma, attachment, severe mental disorders, psychosis, as well as psychodynamic therapy, mind-body interfaces, holistic approaches, and cultural diversity.


Jocelyne Klasen, Ph.D.
Dr. Klasen graduated summa cum laude from the University of New Mexico’s University Honors Program with a Bachelor of University Studies. She went on to achieve a Master of Arts in Counseling from Western New Mexico University followed by a PhD in Clinical Psychology with an emphasis in Depth Psychology from Pacifica Graduate Institute in Carpinteria, California. In addition, she has extensive experience teaching graduate level courses in counseling. Dr. Klasen is fluent in French.

Dr. Klasen’s clinical interests are focused in the tradition of the Object Relation theories, human development, trauma, interdisciplinary studies, cultural traditions in relation to the development of the human psyche, and the treatment of severe emotional disorders. She uses a combination of humanistic, psychodynamic and cognitive/behavioral approaches.


Emily Epstein, PMHNP-BC
Ms. Epstein received a Bachelor’s degree in Neuroscience from the Colorado College. She holds a Bachelor of Science in Nursing and Master of Science in Nursing from the University of Southern Maine.

Ms. Epstein speaks Spanish. She is a mindfulness practitioner and researcher and has developed mindfulness programs for both patients and healthcare employees. She is also a yoga instructor, with a focus on movement-based yoga for veterans with PTSD.




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