Tri-County Orthopedics and Sports Medicine, PA in Cedar Knolls
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Office in Cedar Knolls
  • Areas of Practice:
  • Orthopedic Surgery

Tri-County Orthopedics and Sports Medicine, PA

About Us

Tri-County Orthopedics is the most preferred, recognized, and awarded orthopedic practice in the region. Our orthopedic surgeons and physicians are specialists dedicated to caring for your entire musculoskeletal system. That means our orthopedic doctors treat every injury, deformity, and disorder that can affect your bones, joints, muscles, spine, nerves, tendons, and ligaments. Every physician and surgeon in our world-class team is board-certified or fellowship-trained in their subspecialty. As experts in their fields, our team works together to provide you with the highest level of treatment in orthopedic surgery, nonsurgical sports medicine, and spinal care.

Located in northern New Jersey, our doctors provide services at our main location in Cedar Knolls with satellite locations in Jefferson, Bedminster, and Denville.

At Tri-County Orthopedics, our world-class team is your hometown choice for expert orthopedic care.

Our Doctor

Dr. Andrew A. Willis

Dr. Andrew Willis is a sports medicine surgeon specializing in athletic injuries and disorders of the shoulder, knee, elbow, wrist, and hand at the Sports Medicine Center and the Hand & Upper Extremity Center at Tri-County Orthopedics. Dr. Willis is dual-fellowship-trained and holds a subspecialty certificate of added qualifications in shoulder, knee, and hand surgery.

Dr. Willis specializes in advanced arthroscopic and minimally invasive surgery, ligament reconstruction, and cartilage restoration procedures as well as fracture care, tendon repair, and upper extremity joint replacement.

Dr. Willis currently serves as the associate team orthopedic surgeon for the New York Jets and is the head team physician for Drew University in Madison, New Jersey, and the Delbarton School in Morristown, New Jersey.

Education & Training
  • Bachelor of Arts: Dartmouth College, Hanover, NH
  • Doctor of Medicine: Columbia University Vagelos College of Physicians and Surgeons, New York, NY
  • General Surgery Internship: NewYork-Presbyterian/Weill Cornell Medical Center, New York, NY
  • Orthopedic Surgery Residency: Hospital for Special Surgery, New York, NY
  • Hand, Microvascular, and Upper Extremity Surgery Fellowship: Mayo Clinic, Rochester, MN
  • Congenital Hand Surgery Fellowship: Scottish Rite for Children, Dallas, TX
  • Sports Medicine and Shoulder Surgery Fellowship: Hospital for Special Surgery, New York, NY
  • Board Certifications
  • American Board of Orthopaedic Surgery
  • Hospital Affiliations
  • Morristown Medical Center
  • Lenox Hill Hospital
  • Morristown Medical Ambulatory Surgery Center
  • Surgical Center at Cedar Knolls, LLC
  • Honors and Awards
  • Dr. Willis is the author of numerous peer-reviewed original research articles as well as book chapters on sports medicine topics ranging from ACL and meniscal injuries in adolescents to Tommy John surgery in throwing athletes.
  • His research has been published in top peer-reviewed journals and also includes original work in the field of distal radius, flexor tendon, and distal radioulnar joint surgery.
  • As the recipient of the prestigious Charles S. Neer II Award, his research contributions in the field of shoulder surgery have been recognized and honored both nationally and internationally by the American Shoulder and Elbow Surgeons society.
  • Dr. Willis has been honored three times as one of America’s Top Orthopedists by the Consumers Research Council of America, and he was named a Castle Connolly Top Doctor for the New York metro area two times, most recently in 2020.
  • He has been selected as one of New Jersey’s favorite doctors by his patients, who selected him for the Patient’s Choice Award 2008 and 2009 as determined by uniformly outstanding patient reviews
  • has also been recognized as one of America’s Most Honored Doctors by The American Registry. Additionally, Dr. Willis has been named a Favorite Kids’ Doc in New Jersey Family magazine four times: 2016, 2017, 2018, and 2019.
  • Professional Memberships
  • American Academy of Orthopaedic Surgeons
  • American Orthopaedic Society for Sports Medicine
  • Arthroscopy Association of North America
  • American Society for Surgery of the Hand
  • Our Services
    • Advanced arthroscopic and minimally invasive surgery
    • Ligament reconstruction
    • Cartilage restoration procedures
    • Fracture care
    • Tendon repair
    • Upper extremity joint replacement
    Our Office
    Phone: (973) 538-2334
    Fax: (973) 267-6882
    Monday: 9:00 AM - 5:00 PM
    Tuesday: 9:00 AM - 5:00 PM
    Wednesday: 9:00 AM - 5:00 PM
    Thursday: 9:00 AM - 5:00 PM
    Friday: 9:00 AM - 5:00 PM
    Saturday: Closed
    Sunday: Closed