The River Source - 12 Steps Holistic Drug & Alcohol Treatment Center
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Dr. Walmer Medical Director
Dr. Walmer
Medical Director

Dr. Mark Walmer has a passion for treating people with chemical dependency. He has education and vast experience to address all types of chemical addictions. One of Dr. Walmer's goals is to have people live a life free of chemical dependency. Certifications: American Board of Internal Medicine, diplomate, Certificate No. 113415; American Board of Addiction Medicine (formally American Society of Addiction Medicine); American Society of...

Dr. Dave Arneson Naturopathic Medical Doctor
Dr. Dave Arneson
Naturopathic Medical Doctor

Dr. Arneson started his education at the University of Texas at El Paso, where he received his Bachelor of Science degree in 1992 (with Honors) with a double major in Biology and Psychology. From 1994 to 1996, he continued his education at the University of Texas at El Paso and the El Paso Community College where his focus was on organic chemistry. In 1994 he received the necessary training to be certified by the American Board of Hypnotherapy in...

Dr. Terranella
Naturopathic Medical Director, Mesa Center

Naturopathic Physician with a primary care focus and strong background in integrative medicine. Passionate for finding integrative health care solutions to those in need. Special interests, training in diabetes, cardiovascular and addiction disease. Doctor of Naturopathic Medicine 2001-2006 Bastyr University Kenmore, WA Research
  • Methadone clinic treating patients for drug and alcohol addiction.
  • BCNH Retrospective chart analysis-...

Dr. Fred Arnold Natturopathic Medical Doctor
Dr. Fred Arnold
Natturopathic Medical Doctor

Fred Arnold, NMD, DC has treated patients for over 20 years and is one of the few physicians in the nation with both naturopathic and chiropractic degrees. He integrates conventional medicine and state-of-the-art holistic therapies to best meet the needs of each individual patient. Dr. Arnold attended Palmer College of Chiropractic and graduated in 1983. From 1983 to 1999, he had a private practice in Dallas-Fort Worth, Texas. He attended Southwest...

Dr. LaCoss N.M.D.
Dr. LaCoss
N.M.D.

Dr. LaCoss completed her undergraduate education in 2006 at Carroll College in Waukesha, Wisconsin, where she earned her Bachelor of Science with a major in Human Biology. As part of her studies at Carroll College, Dr. LaCoss initiated her own research project that looked at the effects of acute and chronic stress on the body. After graduating from Carroll College, Dr. LaCoss moved to Arizona to attend the Southwest College of Naturopathic Medicine...

Kris Berkner
N.M.D.

Kris Berkner N.M.D.is licensed in Arizona where she has lived for 45 years. She received her BS from the University of Arizona in 1988. While attending Southwest College of Naturopathic Medicine she did extensive training in drug and alcohol detox and rehabilitation. She combines her abilities to work well with the patients with her knowledge of botanical medicine, nutrition, homeopathy, bio identical hormones, weight loss, and acupuncture. Dr....

Liz Martin Vice President of Operations
Liz Martin
Vice President of Operations

Liz Martin received a Bachelor of Science in Business Administration from Central Washington University in 1999 with emphasis in Human Resource Management and Organizational Theory. She also has over 15 years of experience in the restaurant industry working at various operating levels throughout the Pacific NorthWest. Her own personal struggle with addiction is what brought her to The River Source several years ago. Today she has a new life filled with hope, faith and courage. Liz is...

Jenny Cilwa - Clinical Director Casa Grande
Jenny Cilwa
Clinical Director - Casa Grande

Jenny Cilwa has 10 years experience, personally and professionally, working extensively in the areas of addiction, chemical dependency, dual diagnosis, eating disorders, trauma, group and family therapy.
Jenny’s professional career includes working with families struggling with the impact of addiction and working with men and women in addictions, specific to substance abuse, co-dependency, and grief and loss. Jenny applies special...

Testimonials Dwne erro

" I am taking time to write to tell you of the progress that my mother has had after attending a month long re-hab session there. She now attends AA regularly, and has become overall a much more positive person. She is sober and able to go on trips to visit me without a whole mess of excuses and negativity. I think of you all often and want you all to keep doing what you are doing, and keep doing it the way you are doing it. I have attended AA with her on several occasions, and have really..."
Nicholas S. - October 2009
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Meet Our Staff

Liz Martin Vice President of Operations
Liz Martin
Vice President of Operations
Dr. Fred Arnold Natturopathic Medical Doctor
Dr. Fred Arnold
Natturopathic Medical Doctor
Dr. Dave Arneson Naturopathic Medical Doctor
Dr. Dave Arneson
Naturopathic Medical Doctor
Dr. LaCoss N.M.D.
Dr. LaCoss
N.M.D.
Dr. Walmer Medical Director
Dr. Walmer
Medical Director
Jenny Cilwa - Clinical Director Casa Grande
Jenny Cilwa
Clinical Director - Casa Grande