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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

Rehabs 360 Guide


Located in downtown Billings, Montana, Rimrock offers medical detox, residential treatment and outpatient care to adults struggling with substance use disorder. The facility also provides classes for DUI/DWI clients, which is a service offered by 45.8 percent of treatment facilities in Montana.


All clients receive a comprehensive assessment to determine the appropriate level of care. Treatment combines the 12-Steps with evidence-based methods.

The residential program includes psychiatric services, individual and group counseling, family therapy, spirituality sessions, and art therapy. This level of care also provides specialized treatment tracks for eating disorders and gambling disorder, the latter of which is a service offered by 58.3 percent of treatment facilities in Montana.

Outpatient options include day treatment, which offers up to 12 hours of treatment a day, an intensive outpatient program (IOP), and general outpatient care. Aftercare is available to all clients who successfully complete the residential or day treatment programs.


The treatment team includes a medical director and psychiatrist, as well as social workers, licensed addiction counselors, and master’s-level counselors. The 15 individuals surveyed about the staff to date indicated that their performance was slightly above average.

Staff Experience and Training: 3.7/5


There is currently no information provided by the facility regarding its living arrangements and related offerings. However, the 15 individuals surveyed about the facility's upkeep indicated it was slightly above average.

Cleanliness: 3.5/5


Of the five former clients surveyed by Rehabs.com to date, three gave the facility positive feedback, one gave the rehab mixed feedback, and one provided a negative review. Satisfied alumni raved about the staff and indicated that treatment was effective. "Well staffed, staff listens and counselors are available," K.M. wrote in a review representative of positive feedback.

Complains included bad food, a lack of treatment for co-occurring disorders, and the need for longer residential programs. "Mental health issues need to be addressed more and I believe there should be classes for this as well as drug/alcohol classes and groups. But 28 days is definitely not enough time for inpatient treatment," Elizabeth wrote in a review representative of less favorable feedback.

Rimrock earned an average rating of 3.3 out of five stars based on 27 Google reviews[1] and a 4.5 out of five-star rating based on the opinions of 42 people on Facebook, which the facility may manage[2].


Of the 14 loved ones polled by Rehabs.com at the time of this writing, eight offered positive feedback, four offered mixed feedback, and two gave a negative review. Loved who were happy with the rehab indicated that the treatment was effective, the staff were knowledgeable and compassionate, and the family services were helpful.

"As a family member, I can honestly say that I, too, am a better person as I was faced with really searching my own behaviors and how they affected the family dynamics," an anonymous loved one wrote in a review representative of positive feedback. Complaints included a lack of counseling and exercise options, as well as insufficient aftercare.

Overall, the 13 loved ones polled on more granular metrics moderately approved of the level of family participation and counseling options, while nine polled on the matter reported they'd recommend the facility.

Would Recommend: 4/5
Family Participation: 3.5/5
Counseling Options: 3.3/5


B.L., the one staffer polled by Rehabs.com to date, wrote: "I love working at Rimrock! Everyone here has such a big heart and truly care about all of the patients. I wouldn\'t want to work anywhere else."


The facility’s website indicates that some insurance and private pay are accepted, and financing options are provided through the healthcare loans company American Healthcare Lending. Overall, the 12 individuals polled on the matter gave mixed opinions concerning the facility's cost.

Affordability: 3.3/5

[1] GoogleReviews
[2] https://www.facebook.com/pg/RimrockFoundation/reviews/?ref=page_internal

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