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American Addiction Centers National Rehabs Directory

Rimrock Foundation

1231 North 29th Street, Billings, Montana, 59101
Rimrock Foundation is the largest treatment center in the Yellowstone Valley region, offering comprehensive care for substance abuse and dual diagnosis, as well as sex addiction, eating disorders and codependency. The facility offers detox, residential, day treatment and outpatient services, all of which are designed to address each client’s emotional, physical, spiritual and social well-being. Evidence-based treatments are combined with 12-Step methodology to provide clients with a well-rounded recovery experience and the opportunity to achieve balance in their lives.

Facility Highlights

  • Specialty Programs


  • Medical Detoxification

    Drugs and alcohol have widespread effects throughout your body, including but not limited to the addiction and/or physical/psychological dependence that develops with substance abuse over time. Many organ systems are affected by addiction and will react to withdrawal. The term “medical detoxification” means that there is a trained and licensed medical professional onsite to monitor your vital signs and protect your physical and emotional health as your body goes through withdrawal.
  • Intensive Outpatient (IOP)

    Patients who undergo intensive outpatient treatment continue to live at home and sometimes go to school or work while participating in a highly structured treatment protocol that is focused on ending substance abuse. Programs vary in terms of how much treatment patients receive, how often and for how long. Some facilities design individualized intensive outpatient treatment programs.

Facility Settings

  • Lakeside

Meet the Staff

  • Lenette Kosovich, RN, MHA
    Lenette Kosovich, RN, MHAChief Executive Officer
    Lenette Kosovich has over 20 years of senior management experience in healthcare administration. Starting as a Pediatric Registered Nurse, and then acquiring a Master’s Degree in Healthcare Administration, her level of responsibility grew exponentially. She has a breadth and depth of experience in the healthcare field including serving as the Regional Director in the “cutting edge” industry of establishing Employer Based Clinics for a third party administrator and also provided leadership as Director of Human Resources to a major Montana healthcare system. Her commitment to learning is kept active through her work as an adjunct professor at Montana State University- Billings in the Healthcare Administration program. Lenette is also a member of the National Association of Addiction Treatment Providers (NAATP).
  • Coralee Goni, MS, MBA, MAC
    Coralee Goni, MS, MBA, MACChief Operations Officer
    Coralee Goni is the Chief Operations Officer at Rimrock. She holds a Master’s Degree in Psychology, a Master’s in Business Administration, and is licensed by the state of Montana as an Addiction Counselor. She also holds accreditation from the National Association of Alcohol and Drug Addiction Counselors as a Masters level Addiction Counselor and holds certification from CSAT (Center for Substance Abuse Treatment) for Motivational Enhancement Therapy for Adolescent Cannabis abusers. Coralee is responsible for managing the general operations at Rimrock, to include Adult treatment, Adolescent Treatment, Sober Housing, and the Treatment Court Programs.

Financial Details

  • Financing Available

Treatment Center Links

Treatment Center Details

Service Settings

Treatment Approaches

Payment Accepted

Special Programs

Type Of Care

Opioid Medications Used In Treatment

Type Of Alcohol Use Disorder Treatment

Type Of Opioid Treatment


Facility Operation

License/ Certification/ Accreditation

Assessment/Pre Treatment

Screening And Testing

Transitional Services

Ancillary Services

Other Addictions


Counseling Services And Education

Tobacco/Screening Services

Facility Smoking Policy

Age Groups Accepted

Gender Accepted

Exclusive Services

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Patient Reviews

Overall Ratings
  • 3.5
    Avg. score from 23 reviews
  • 3.5
    Accommodations & Amenities
  • 3.5
    Treatment Effectiveness
  • 3.6
    Meals & Nutrition
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  • Accommodations & Amenities
  • Treatment Effectiveness
  • Meals & Nutrition
I was very disappointed with Rimrock Treatment Center. My child was there for 22 days. It took 1 1/2 weeks to even get her admitted and even then we were not told she had a bed until we drove 500 miles to get there. She was released on New Year\'s eve in a city she did not know with no ID or money. My child was put on 5 different medications with absolutely no follow up. The staff would show up late and were unorganized for group meetings. Important medical notes from the counselor were not shared with our insurance company which had made the decision to end coverage for residential treatment. From beginning to end, our experience was very frustrating. I would not recommend this treatment center.
Ruth Michels
  • Accommodations & Amenities
  • Treatment Effectiveness
  • Meals & Nutrition
After getting use to the environment etc. our heath insurance said they would only cover first half of th e 28 days. Family and staff did not include me in the decision making to remain the entire time, (cost was enormous!) It became harder and harder for me in small group sessions. The Counselor did not hold same expectations for every individual, letting some members sleep during important presentations! Cliques were never discouraged by a majority of staff. Never saw staff observations by establishment supervisors.
    Do not send your kids to the adolescent house unless you personally know the staff. My son was refused treatment in less then 12 hours to accommodate a resident that wanted his own room. Rimrock charged me $1800 for less then 12 hours of "services". Do not send your kids to rimrock
    • Accommodations & Amenities
    • Treatment Effectiveness
    • Meals & Nutrition
    It worked for our family. structured atmosphere. inadequate exercise facilities.
    • Accommodations & Amenities
    • Treatment Effectiveness
    • Meals & Nutrition
    Treatment is never long enough. Staff experience and understanding. Aftercare was a weakness.