Scott A. Sigman, M.D.

Dr. Scott A. Sigman is a board-certified orthopaedic surgeon providing comprehensive care to patients at Orthopedic Surgical Associates of Lowell since 1996.  Specializing in Sports Medicine, Dr. Sigman possesses the skills and experience to diagnose and treat sports injuries and conditions affecting the knee and shoulder.  In addition to his practice duties, he has served as the Team Physician for the US Ski Jump Team, and serves for the last 20 years as the Team Physician at UMASS Lowell, and is the past Chief of Orthopaedics at Lowell General Hospital.

Dr. Sigman graduated cum laude with his Bachelor’s degree in Biology from Tufts University, where he played varsity lacrosse and was President of the Alpha Epsilon Pi fraternity.  He then received his medical degree as a cum laude graduate of the University of Maryland School of Medicine and member of the prestigious Alpha Omega Alpha medical honor society.

Upon graduating with his medical degree, Dr. Sigman completed his postgraduate internship in General Surgery at St. Agnes Hospital, followed by a residency in Orthopaedic Surgery at Tufts Medical Center.  Dedicated to furthering his training, Dr. Sigman also completed a fellowship in Sports Medicine at the prestigious Kerlan-Jobe Orthopaedic Clinic, during which he was responsible for the orthopaedic care of the Los Angeles Lakers, Los Angeles Dodgers, LA Angels, LA Kings, Anaheim Mighty Ducks, LA Galaxy and USC football.

In addition to his extensive training and practice experience, Dr. Sigman has also contributed to numerous publications and research studies regarding advances in the field of orthopaedic surgery.  He takes great pride in remaining informed of the latest state-of-the-art arthroscopic techniques for both knee and shoulder surgery.  He also gives presentations and lectures and instructional courses to fellow surgeons throughout the world in new shoulder and knee surgery techniques.


  • American Academy of Orthopaedic Surgeons
  • Arthroscopy Association of North America
  • American Orthopaedic Society for Sports Medicine
  • Massachusetts Orthopaedic Association
  • New England Shoulder and Elbow Society


  • Patients’ Choice Award (2010 – 2012, 2014 – 2016)
  • Compassionate Doctor Recognition (2010, 2012, 2014, 2015)
  • On-Time Doctor Award (2015)

Kristen Proverb, MSN, RN, NP-C

Kristen Proverb is a certified nurse practitioner who has provided specialized orthopaedic care to patients of Dr. Scott Sigman since 2006.   At Orthopaedic Surgical Associates, Kristen assists in the diagnosis and treatment of a wide range of orthopaedic conditions, focusing primarily on sports medicine.  She has experience with x-ray, MRI, CT and other imaging exams, as well as pre- and post-operative care.

Kristen graduated with her Bachelor’s degree in Political Science at the University of Massachusetts before completing a Master of Science degree in Nursing at Northeastern University as part of the Direct Entry ANP Program.  Upon graduation, Kristen was certified as an Adult Nurse Practitioner.

Before joining Dr. Sigman’s team, Kristen served as a Clinical Nurse at Massachusetts General Hospital specializing in vascular surgery and critical care at North Shore Medical Center.  She is a member of the American Academy of Nurse Practitioners and the Massachusetts Coalition of Nurse Practitioners.


Dr. Scott Sigman uses EXPAREL to reduce opioid reliance and consumption.  EXPAREL can provide a non-opioid pain control in the first few days after surgery when patient’s postsurgical pain is the highest.  When using EXPAREL, there is no need for catheters, pumps, or other delivery devices.

Dr. Scott Sigman is a consultant for Pacira Pharmaceuticals, Inc., and has partnered with them on an initiative to use opioid alternatives in the surgical setting.