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UChicago Faculty Physicians

Nicholas Maassen, MD

Assistant Professor of Orthopedic Surgery and Rehabilitation Medicine

Nicholas Maassen, MD, is an expert orthopaedic surgeon who specializes in elbow and shoulder injuries. Dr. Maassen’s primary focus is treating patients suffering from soft tissue (muscle, tendon and ligament) injuries, shoulder/elbow arthritis, and fractures in the upper extremity.

Dr. Maassen combines his clinical expertise with on-going investigative research efforts in the hopes of pioneering techniques and therapies that improve care for patients with complex orthopaedic disorders and injuries. Currently, Dr. Maassen is evaluating repair techniques for rotator cuff tears and shoulder instability so he can offer a wide range of quality treatment options. He has also been published in a number of highly respected journals, including the Journal of Shoulder and Elbow Surgery, Arthroscopy, Journal of Orthopaedic Trauma and Journal of Bone and Joint Surgery.

Board Certifications

  • Orthopaedic Surgery

Memberships & Medical Societies

  • American Shoulder and Elbow Surgeons
  • Mid-America Orthopaedic Association
  • American Association of Orthopaedic Surgery

Practicing Since

  • 2014

Languages Spoken

  • English

Medical Education

  • University of Wisconsin School of Medicine and Public Health


  • University of Wisconsin Hospitals and Clinics


  • UW Health University Hospital


  • Beth Israel Medical Center

  • Aetna HMO (specialists only)
  • Aetna POS
  • Aetna PPO
  • BCBS Blue Precision HMO (specialists only)
  • BCBS HMO (HMOI) (specialists only)
  • Cigna HMO
  • Cigna POS
  • Cigna PPO
  • CountyCare *see insurance page
  • Aetna Better Health *see insurance page
  • Medicare
  • Multiplan PPO
  • United Choice Plus POS/PPO
  • United Options (PPO)
  • United Select (HMO & EPO) (specialists only)
  • United W500 Emergent Wrap
  • Aetna Medicare Advantage HMO & PPO
  • BCBS Medicare Advantage HMO & PPO
  • Humana Medicare Advantage Choice PPO
  • Humana Medicare Advantage Gold Choice PFFS
  • Humana Medicare Advantage Gold Plus HMO
  • United Choice HMO (specialists only)
  • University of Chicago Health Plan (UCHP)

Our list of accepted insurance providers is subject to change at any time. You should contact your insurance company to confirm UChicago Medicine participates in their network before scheduling your appointment. If your insurance company is not listed here, or if you have any other questions, please contact

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