Medical Staff

CeDAR is a UCHealth facility with licensed and credentialed clinicians who are dedicated to improving lives.

Contact us or call 720.848.3000 to speak with someone at CeDAR

Meet our Medical Team

Laura Martin, MD
Medical Director

Dr. Laura Martin is a board-certified addiction psychiatrist. She graduated from Wake Forest School of Medicine in 1997 and completed her Residency in Psychiatry at University of Denver School of Medicine in 2002. She is an Assistant Professor within the Department of Psychiatry's Division of Psychopharmacology at University of Denver School of Medicine. Dr. Martin has lectured extensively, authored numerous articles in peer review journals, and has been an investigator on research grants studying the effects of nicotine in the brain and tobacco cessation. She is also a member of the Colorado Psychiatric Society and the American Psychiatric Association.

Jon's Photo
Jonathan Ritvo, MD
Senior Medical Director

Dr. Jonathan Ritvo offers patients over 30 years of nationally recognized care. Trained at Harvard Medical School and the UCHealth Sciences Center, he is a board-certified addiction psychiatrist and one of metro Denver's Top Doctors (5280 magazine). Dr. Ritvo has held numerous leadership positions in the addiction psychiatry residency program at the University of Colorado Hospital. He also has served as chair of the American Psychiatric Association's committee on training and education. Dr. Ritvo is a Clinical Professor of Psychiatry at the University of Colorado School of Medicine.

“I work at CeDAR because I love the teaching and learning environment, the collegiality and professionalism of the staff and the opportunity to get to know and work with patient over an extended period of time.”

Patrick's Photo
Patrick Fehling, MD
Attending Psychiatrist

Dr. Patrick Fehling is a graduate of the University of Wisconsin Medical School. He completed his Residency and Addiction Psychiatry Fellowship training at UCHealth Sciences Center in Denver. He worked at CeDAR during his Addiction Psychiatry Fellowship training. His clinical interests include psychotherapy, personality disorders and motivation as it applies to recovery. Dr. Fehling plays the guitar, enjoys snowboarding and card games. Dr. Fehling is a Senior Clinical Instructor at the University of Colorado School of Medicine and Assistant Professor of Psychiatry.

Christian's Photo
Christian Hopfer, MD
Attending Psychiatrist

Dr. Christian Hopfer is Professor of psychiatry in the Division of Substance Dependence at the University of Colorado School of Medicine. Before coming to CeDAR he served as the Director of Adult Psychiatric Services at the Addiction Research and Treatment Services for 15 years. Dr. Hopfer is a distinguished Fellow of the American Psychiatric Association, member of the College on Problems of Drug Dependence, and past president of the Colorado Child and Adolescent Psychiatric Society. He has produced over 65 scientific publications on substance dependence and has been the principal investigator on multiple studies funded by the National Institute on Drug Abuse examining outcomes of adolescents with severe substance dependence and genetic influences on substance dependence. Dr. Hopfer is a Professor of Psychiatry at the University of Colorado School of Medicine.

Terese's Photo
Theresa Moore, BSN, CARN
Nurse Manager

Theresa “Trese” Moore has been working in the Mental Health Nursing field for over 25 years.  She graduated from the Carlow University Nursing Program Pittsburgh Pennsylvania in 1985 with a Bachelor of Science in Nursing.  Upon graduation, she received recognition for Leadership in Nursing as determined by the Nursing Professors of the Program.  Trese enlisted in the United States Army and was on active duty for 5 years.  During this time, she studied an Army sponsored Psychiatric-Mental Health Nursing Program and received her certification. Over the years that followed, Trese has worked in many different settings in Mental Health Nursing from acute inpatient settings to emergency departments.  She began work at CeDAR when its doors opened in 2005 as a staff nurse.  Trese has been certified as an Addictions Registered Nurse since 2010 through the International Nurses Society on Addictions.

“What I like about working in this area is watching our patients get well and get back to the person they truly are. Once their addiction is treated, the progress toward health is dramatic and remarkable.  Who wouldn’t want to work in a job like that?” 


Bari Platter, MS, RN, PMHCNSBC
Bari Platter, MS, RN, PMHCNSBC
Clinical Nurse Specialist

Bari Platter has a master’s degree is Psychiatric/Mental Health Nursing and has worked as a Clinical Nurse Specialist for over 25 years. She has written a curriculum, published by Hazelden, which integrates Dialectical Behavior Therapy and the Twelve Steps. In 2016 Ms. Platter won the Florence Nightingale Luminary Award for Innovation in Non-Traditional Practice in the state of Colorado.

In addition to facilitating several groups at CeDAR and providing individual therapy, Ms. Platter also teaches at the University Of Colorado College of Nursing in the graduate program, provides clinical supervision at the University Of Colorado Hospital’s Outpatient Psychiatric Clinic and presents at numerous local, regional and national conferences. Ms. Platter works at CeDAR because she is committed to providing excellent, evidence‐based care to people who have substance use disorders. It is rewarding to be able to help her patients begin to have a life worth living in recovery.

Juliana Wisher, MSN, RN, PMHCNS-BC
Clinical Nurse Specialist, Addiction Medicine Consult-Liaison Service

Juliana Wisher is a master’s prepared registered nurse and board certified psychiatric clinical nurse specialist with over 25 years experience in psychiatric nursing, addiction medicine and pain management. Her clinical passions include compassion fatigue and complex presentations of pain in patients with addictions. In her current role she sees hospitalized patients whose medical illnesses are complicated by their addictive disorders, develops comprehensive treatment plans utilizing evidence-based clinical interventions to ensure best possible outcomes, and provides training to hospital staff on patient substance abuse issues. Ms. Wisher received undergraduate and graduate degrees in nursing from Indiana University in 1990 and 1993. She is a former faculty member in the online graduate nursing program at Regis University and current Adjoint Instructor in the Department of Psychiatry at the University of Colorado.