Our Experts

Daniel Angres, M.D.

Addiction Medicine Experts and Substance Abuse Counselors

The addiction experts at the Positive Sobriety Institute are a team of board-certified physicians, nurse practitioners, psychologists and addiction medicine clinicians who have contributed an astounding amount of research and thought leadership to the development of new addiction recovery approaches. They have spent countless hours delivering care to individuals from all walks of life and varying addictions. Through their clinical work, and their publications, they are successfully dispelling the myth of addiction as a disease that afflicts the weak and are paving the way to help individuals in their peer group and beyond to overcome this pervasive condition.

Our Team of Addiction Experts

  • Daniel H. Angres, MD

    Daniel H. Angres, MD

    Medical Director

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  • Dr. Anish John, MD

    Dr. Anish John, MD

    Associate Medical Director

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  • Kathy Bettinardi-Angres, APN

    Kathy Bettinardi-Angres, APN

  • Dominic Angres, MA, LCPC, CADC

    Dominic Angres, MA, LCPC, CADC

    Executive Director

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  • Michael Geraci, MA, LCPC

    Michael Geraci, MA, LCPC

    Clinical Director

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  • John Gardiner, MS

    John Gardiner, MS

    Program Director

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  • Robert “Bob” Chapelle

    Robert “Bob” Chapelle

    Director of Admissions

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  • Timothy D. Cullitan, M.S., LCPC, CADC

    Timothy D. Cullitan, M.S., LCPC, CADC

    Lead Therapist

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  • David Gasper, MA, LCPC

    David Gasper, MA, LCPC

    Family Therapist

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  • Emiley Strachan, CADC

    Emiley Strachan, CADC


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  • Pamela Boytim

    Pamela Boytim


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  • Sandy Brzakala

    Sandy Brzakala

    Office Coordinator

Insurance Accepted


  • Located in the heart of downtown Chicago, Illinois steps off of the Magnificent Mile and accessible via two international airports located just 30-45 minutes away.
  • Our Medical Director, Daniel Angres, MD, is triple board certified in addiction medicine, psychiatry and neurology and addiction psychiatry.
  • Positive Sobriety Institute offers partial hospitalization (PHP), intensive outpatient therapy (IOP), and addiction after care programs.
  • Positive Sobriety Institute specializes in expert-delivered addiction assessment, rehabilitation and recovery services to highly motivated professionals and others who fit our milieu.
  • Positive Sobriety Institute's amenities include exercise physiology, walking, yoga, and acupuncture.
  • Positive Sobriety Institute's convenient downtown Chicago location is conducive to serving a myriad of client ancillary clinical needs, such as eating disorder treatment, specialized treatment and 12 step programs for other compulsive behaviors and other behavioral problems.
  • Positive Sobriety Institute offers first-class dining and cuisine within walking distance to the program.

Get Help Now

The addiction recovery and rehabilitation experts at Positive Sobriety Institute are standing by 24/7 to answer your questions about our addiction treatment and rehabilitation program.