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Addiction Medicine Division

Reducing the world’s largest preventable cause of death through science, practice, education, and research.

Addiction Medicine at Hennepin Healthcare provides three main clinical services: an opioid treatment program, an office-based addiction treatment clinic, and inpatient addiction medicine consultation services. In addition to clinical care, our faculty excel in medical education for trainees and community providers.

Clinical Services

Clinical Services

Clinical services offered by the Division of Addiction Medicine include:

  • Federally licensed Opioid Treatment Program
  • Office-based addiction treatment clinic
  • Inpatient and emergency addiction consultation services
Education & Training

Education & Training

Fellowship training in addiction medicine is available through a tri-institutional program in collaboration with the University of Minnesota and the Minneapolis Veterans Affairs Medical Center. Ongoing and free training through our various addiction-related Project ECHO clinics is available to providers throughout the region.



Research in the Division of Addiction Medicine spans clinical pharmacology and pharmacogenetics, clinical trials for the treatment of psychostimulant use disorder, implementation science, and educational interventions. We serve as the lead for the NorthStar node of the National Institute on Drug Abuse Clinical Trials Network. We partner with other major research teams at Hennepin Healthcare including the Health, Homelessness, and Criminal Justice Lab and the Behavioral Health Equity Research Group. NorthStar’s external research partners include the Native American Community Clinic, all major health systems in Minnesota, the University of Wisconsin-Madison, the University of Iowa Health, the University of Missouri Kansas City, and Duke University.

Learn more about research at Hennepin Healthcare at:

Addiction Medicine Clinical and Research Faculty

Our faculty include physicians, physician assistants, and nurse practitioners with backgrounds in internal medicine, internal medicine/pediatrics, family medicine, and psychiatry with additional expertise in clinical pharmacology, population health, quality improvement, and psychosomatic medicine.

Bart Gavin ContactGavin Bart, MD, PhD, FACP, DFASAM

Professor of Medicine, University of Minnesota Medical School
Faculty, Graduate Program, Department of Pharmacology, University of Minnesota Medical School

Combined, the use of tobacco, alcohol, and illicit drugs is the largest risk factor contributing to early disability and death on the planet. Medical and scientific advances are improving the lives of those with substance use disorders and can decrease the associated risks of drug use. As Director of the Division of Addiction Medicine, I am involved in the strategic oversite of our opioid treatment program, office-based addiction treatment clinic, hospital-based addiction consultation service, and the development of our faculty and trainees. My clinical focus is on treatment of opioid use disorder in an opioid treatment program setting and I also work in our office-based addiction treatment clinic. My research primarily focuses on the biological and pharmacokinetic factors that influence addiction treatment response and outcome. Through education and research I am engaged in helping health systems and communities implement best practices in addiction care.

Education and training

  • PhD, Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN
  • Clinical Scholar, Laboratory of the Biology of Addictive Diseases, The Rockefeller University, New York City, NY
  • Internal Medicine Residency, Hennepin County Medical Center, Minneapolis, MN
  • MD, University of Minnesota Medical School, Minneapolis, MN
  • BA, University of California at Santa Cruz, CA

Recent Publications

View all publications (NCBI MyBibliography)


  • UG1DA040316 (NIDA): NorthStar Node of the Clinical Trials Network; 06/01/2020-02/28/2025; Principal Investigator
  • UG1DA040316-05S4 (NIDA): CTN-0098A Extended-release buprenorphine hospital initiation trial to enhance treatment engagement (EXHIT ENTRE); 6/1/19-2/28/24; Contact Principal Investigator
  • UG1DA040316-05S4 (NIDA): CTN-0098B Hospital-based Opioid Treatment Implementation (EXHIT ENTRE: HBOT); 6/1/19-2/28/24; Contact Principal Investigator
  • UG1DA040316-05S2+05S3 (NIDA): CTN-0095 (COMPUTE 2.0); 6/1/19-2/28/2024; Contact Principal Investigator
  • UG1DA040316 Supplement (NIDA): Suicide Prediction and Prevention for People at Risk for Opioid Use Disorder; 6/1/20-2/28/2022; Contact Principal Investigator
  • UG1DA040316 Supplement (NIDA): Reducing stigma toward people with opioid use disorder among primary care clinicians; 6/1/20-2/28/2021; Contact Principal Investigator
  • UG1DA040316 (NIDA): CTN-0112 Optimal Policies to Improve Methadone Maintenance Adherence Long-Term (OPTIMMAL); Co-investigator
  • UG1DA040316 (NIDA): CTN-0123 Facebook Intervention for Preventing Opioid Relapse among American Indian Women; Co-investigator
  • UG1DA040316 (NIDA): CTN-0124 Assessment and Design of a Cost-Effective Collaborative MOUD Delivery System; Principal Investigator
  • UG1DA040316 (NIDA): CTN-0127 Engaging African American Faith-Based Leaders in a Substance Use Learning Collaborative Companion; Contact Principal Investigator

Lauren Graber, MD, MPH

Assistant Professor of Medicine, University of Minnesota Medical School 

Education and training

  • MPH, Harvard University TH Chan School of Public Health, Boston, MA
  • Family Medicine Residency, Boston Medical Center, Boston, MA
  • MD, Yale University School of Medicine, New Haven, CT
  • BA, Wesleyan University, Middleton, CT

contact photo only brian grahan mdBrian Grahan, MD, PhD

Assistant Professor of Medicine, University of Minnesota Medical School

Medical Director, Office-Based Addiction Medicine Services, Hennepin Healthcare

Dr. Grahan’s clinical practice focuses on the care of people with substance use disorders as well as the social, medical, and psychiatric conditions that often occur together. His PhD work focused on the behavioral economics and outcome measurement issues related to substance use in adolescents and young adults. After spending a year learning advanced quality improvement and performance measurement techniques, he joined the faculty at HCMC to combine these efforts to improve the care for people who live in the Twin Cities community.

Education and training

  • Addiction Medicine Fellowship, University of Minnesota, Minneapolis, MN
  • Chief Resident in Quality and Patient Safety, Veteran’s Affairs Medical Center, Minneapolis, MN
  • Internal Medicine and Pediatrics Residency, University of Minnesota Medical School, Minneapolis, MN
  • MD-PhD, University of Wisconsin School of Medicine and Public Health, Madison, WI
  • Coro Scholar in Public Affairs, Affiliated with Carnegie Mellon University, Pittsburgh, PA
  • BA, Northwestern University, Evanston, IL

Heaney Kathleen Contact Kathleen Heaney, MD, DFAPA

Assistant Professor of Medicine, University of Minnesota Medical School

Dr. Heaney is an expert in working with patients who have psychiatric illness and substance use disorders. She collaborates with psychiatric and addiction medicine colleagues to provide the best care for each patient.


Education and training

  • Addiction Psychiatry Fellowship, Mayo Clinic, Rochester, MN
  • Psychiatry Residency, Hennepin – Regions Psychiatry Training Program, Minneapolis, MN
  • Psychiatry Internship, Mayo Clinic, Rochester, MN
  • MD, Jefferson Medical College, Philadelphia, PA
  • BA, College of St. Catherine, St. Paul, MN
  • RN, Mercy School of Nursing, Des Moines, IA

Reznikoff Charles ContactCharles Reznikoff, MD, FACP, FASAM

Associate Professor of Medicine, University of Minnesota Medical School

Physician, Addiction Medicine Division, Pain Consultation, and Hospital Medicine, Hennepin Healthcare

Associate Program Director, Internal Medicine Residency Program, Hennepin Healthcare

I am committed to treating people with addictive disorders regardless of their background or circumstance. I specialize in pharmacotherapy for opioid and alcohol use disorders. I have in-person and telemedicine clinics in Minneapolis and Lonsdale, Minnesota. I also consult to the Hennepin Healthcare Interventional Pain Clinic and am a hospitalist on a cardiology teaching service. I am an Associate Program Director of the Internal Medicine Residency and am passionate about teaching at all levels. In addition to the work in the hospital, I have been involved in public health advocacy helping to pass various laws to protect people who use drugs, such as the naloxone and fentanyl test strip laws. I sit on state committees that set the standards for appropriate opioid prescribing and work with national organizations to educate clinicians about opioids. I have proudly treated patients at Hennepin Healthcare since 2002.

Education and training

  • Addiction Medicine Fellowship, University of Minnesota, Minneapolis, MN
  • Chief Resident, Internal Medicine, Hennepin Healthcare, Minneapolis, MN
  • Internal Medicine internship and residency, Hennepin Healthcare, Minneapolis, MN
  • MD, University of Wisconsin School of Medicine and Public Health, Madison, WI
  • BS, Zoology, University of Wisconsin-Madison, WI

Recent Publications

  1. Physician Toolkit: Taking Responsibility: Reversing the Overdose Epidemic. Minnesota Medical Association (MMA), American Medical Association (AMA), and Providers Clinical Support System (PCSS). 2022
  2. Shearer RD, Bart G, Reznikoff C. Rethinking the Use of “Polysubstance” to Describe Complex Substance Use Patterns. J Gen Intern Med. 2022;37(12):3174-3175
  3. American Medical Association (AMA) Pain Care Task Force (including Reznikoff C). AMA substance use and pain care task force recommendations. 2021
  4. American Medical Association (AMA) Pain Care Task Force (including Reznikoff C). Addressing Obstacles to Evidence-Informed Pain Care. AMA Journal of Ethics. 2020: 22(8):E709-717
  5. Opioid Prescribing Work Group (OPWG) members (including Reznikoff C), et al. Minnesota's Opioid Prescribing Guidelines. First edition, 2018
  6. Reznikoff C. How acute pain leads to chronic opioid use. Cleveland Clinic Journal Medicine. 2018; 85(11):837-841

Teaching Activities

I have taught hundreds of lectures to every type of audience locally and nationally on the topics of addiction, opioids, cannabis, alcohol, stimulants, pain treatment and medical professionalism. In addition to invited lectures, I have taught multiple courses at the University of Minnesota including the Essentials of Clinical Medicine, Becoming a Doctor, Internal Medicine Clerkship lectures, and invited lectures for medical student interest groups. I develop and deliver addiction curricula for Hennepin Healthcare residencies as well as outside training programs. I have developed teaching materials for practicing clinicians through the Minnesota and American Medical Associations, the American College of Physicians, and Extension for Community Healthcare Outcomes (ECHO).

Other Key Professional Activities

  • Fellow and Laureate, American College of Physicians
  • Fellow, American Society of Addiction Medicine
  • Substance Use and Pain Care Task Force, American Medical Association
  • Governor’s Task Force for Medical Cannabis
  • Steve Rummler Hope Network Medical Advisory Panel
  • Opioid Agonist Therapy Clinic, Northfield Hospitals and Clinics, Lonsdale, MN

Addiction Medicine Advanced Practice Providers

Bauch Brenda ContactBrenda Bauch, MSN, CNP

I am an Adult Nurse Practitioner and have worked at Hennepin Healthcare in the Addiction Medicine Division since 2018. Before working in addiction medicine, I worked as a nurse and nurse practitioner in several acute care settings and internationally in disaster relief and infectious disease management. When I stumbled upon the specialty of addiction medicine, I knew almost immediately it was a good fit. I enjoy working at an intersection of individual health and public health where goals are patient-directed and always include mental health as well as physical health. I am humbled and inspired by the people we serve. 

Education and training

  • MSN, Metropolitan State University, Adult-Geriatric Nurse Practitioner, St. Paul, MN
  • BA, Nursing, Luther College, Decorah, IA

Czaja Marah ContactMarah Czaja, PA-C

Marah Czaja, PA-C

Earl Tournaiainen Catherine ContactCatherine (Kitty) Earl-Torniainen, PA-C

Lead Advanced Practice Provider
Interim Medical Co-Director of Interventional Pain Clinic
Lead of Addiction Medicine Inpatient Consult Service

Provider in the Addiction Medicine Division since 2016, primarily working on Inpatient Consult Service with some outpatient clinic.

Education and training

  • BS, Physician Assistant Program, University of Wisconsin, Madison, WI
  • BA, University of Minnesota Twin Cities, Minneapolis, MN

Recent Publications

Laes J, Earl-Torniainen C. Poster co-presenter, Inpatient Addiction Medicine Consult Service: A Quarter in Action, American Society for Addiction Medicine National Conference, April, 2017.


EXHIT ENTRE study, Northstar Node; 4/2021-5/2023; Medical Professional participant (recruited and enrolled patients)

Teaching Activities

Advanced Practice Provider preceptor for NP and PA students, residents, and fellows, Hennepin Healthcare, Minneapolis, MN, ongoing year round, 2018-present

Course in Addiction, guest presenter, University of Minnesota, Minneapolis, MN, 2/2020, 2/2021, 2/2022

Volunteer lecturer in medical professional pathway, Roosevelt High School, Minneapolis, MN,  March 2022

APP Grand Rounds, A day in the life of Addiction Medicine APP, Hennepin Healthcare, Minneapolis, MN, September 19, 2019

TCHP Lecturer, Continuing Education for APRN and PA-C providers in Hennepin County and Veteran’s Administration, Addiction Medicine Pharmacotherapies, Hennepin Healthcare, Minneapolis, MN, October, 2018 and March 22, 2019

Community Education lecture, Addiction Medicine Pharmacotherapies, Andrew Residence, Minneapolis, MN, March, 2019


Providers Clinical Support System (PCSS) -  X-Waiver Training Instructor, April 15, 2021.

Laes J, Weigand T, Earl-Torniainen C, Malcho J. Panelist, “When your patient on opioid agonist or antagonist therapy gets sick…”, American Society for Addiction Medicine National Conference, April 6, 2019.

Skroch Amy ContactAmy Skroch, DNP

Internal Medicine Outpatient Clinic Provider

I have been working at Hennepin Healthcare in the Addiction Medicine Division since October 2020. In April 2022, I started working with Internal Medicine at the Brooklyn Park Clinic building my own panel and practice in primary care. My clinical interests include underserved populations, particularly people experiencing homelessness, and working toward health equity in population health.

Education and training

  • VA Puget Sound Primary Care Nurse Practitioner Residency, Seattle, WA
  • DNP, Winona State University, Rochester, MN
  • BSN, The College of St. Scholastica, Duluth, MN