ATI's History

From a single clinic in Willowbrook, Illinois and guided by innovation, research, and a commitment to exceptional patient experiences, ATI developed industry-leading rehabilitation programs and expanded into one of the nation’s largest physical therapy providers while staying grounded in the principles that started it all.

Celebrating 30 Years of Champion Moments

 

In 2026, ATI Physical Therapy celebrates 30 years in the musculoskeletal and physical therapy industry. From our first clinic in Willowbrook, Illinois, to more than 850 clinics across 25 states, ATI has grown through innovation, collaboration, and a continued commitment to delivering exceptional care for the patients and communities we serve. Explore the moments that shaped our journey and continue to move ATI forward.

  • ATI, or Assessment Technologies Inc., is founded in Willowbrook, Illinois, focusing on functional capacity for injured workers
  • Early innovation, including the F.I.R.S.T.™ program, sets a new standard in rehabilitation
  • The ATI brand evolves into the Athletic Therapeutic Institute
  • ATI expands into physical therapy and opens its second clinic, establishing a strong foundation for growth

  • ATI expands its presence across Illinois while investing in innovation and patient access
  • ATIpt.com launches, alongside the ATI Foundation and new services like Women’s Health
  • Sports Medicine is introduced, and expansion into Wisconsin marks ATI’s first move beyond Illinois

  • ATI enters a new phase of rapid expansion through acquisitions and new clinic openings across three new states
  • ATI earns national recognition as “Best Physical Therapy Practice in the Nation”
  • Research, leadership development, and internal programs are introduced to support scale
  • ATI introduces a new brand identity featuring the apex, a symbol of helping patients reach new heights in healing and wellness

  • ATI expands into 12 new states through strategic acquisitions and partnerships, surpassing 500 locations nationwide
  • The company becomes the largest physical therapy provider under a single brand in the U.S.
  • New services and technology investments enhance patient care and operational scale
  • ATI Worksite Solutions (AWS) expands into six states to promote injury prevention, early intervention and health and wellness in workplaces
  • National sports partnerships and brand visibility strengthen ATI’s presence

  • ATI enters a new phase focused on enhancing patient and team experience through innovation and culture
  • ATI launches the first industry app for physical therapy, designed to complement in-clinic care
  • The ATI Way is introduced, defining a consistent, high-quality experience for both patients and team members
  • Strategic initiatives and investments strengthen operations and position ATI for long-term growth
  • In 2020, ATI launches CONNECT™, introducing a virtual care platform that expands how and where patients can receive treatment

  • Expansion of digital and virtual care enhances access and flexibility for patients
  • The Institute of Musculoskeletal Advancement (iMSKA) is launched to advance research and support clinical education and professional growth
  • ATI reinforces its commitment to people and culture through a renewed purpose, making every life an active life, and updated values centered on trust, patient care, excellence, collaboration, and innovation
  • ATI strengthens its impact through community and education, including the relaunch of the ATI Foundation and a partnership with Tufts University School of Medicine