- Years caring for New Jersey
- 40
- Years caring for New Jersey
- Physicians and physician assistants
- 15
- Physicians and physician assistants
- Offices, including our state-of-the-art surgical center
- 6
- Offices, including our state-of-the-art surgical center
- Rating across 2,500+ Google reviews
- 4.9★
- Rating across 2,500+ Google reviews
Direct lines
- Appointments 201-791-4434
- Workers’ compensation 201-475-0016
- Pre-certification 201-475-0019
- Surgical scheduling 201-475-8940
- Medical records 201-791-4434 x1141
- Billing 201-791-4679
Fellowship-trained in all areas of orthopaedic surgery
For 40 years, Garden State Orthopaedic Associates has taken a highly personal approach to caring for our patients. We believe the most important aspects of providing quality care are listening to the needs of our patients, thorough testing, communication, patient education, and presenting treatment options.
The practice specializes in sports medicine, total joint replacements, rehabilitation, general orthopaedics, foot and ankle, hand, wrist, knee, shoulder, and spine surgery. This practice is unique in that we maintain a state-of-the-art surgical center for your convenience. We also offer six conveniently located centers in Fair Lawn, Mahwah, Clifton, Paramus, and Iselin. We look forward to having the opportunity to take care of you and to helping you achieve your best possible musculoskeletal health.
Our providers
Meet your dedicated orthopaedic team
Our fellowship-trained physicians and our physician assistants work together to deliver the highest quality of care.
Adam D. Bernstein, MDSports medicine, shoulders & knees
Ryan T. Cassilly, MDSpine
Douglas S. Holden, MD, MBAShoulders & knees
Noah Kirschner, MDSports medicine
Seth R. Queler, MDFoot & ankle
Steven B. Shamash, DOHand & wrist
Fani J. Thomson, DOSpine & sports medicine
Brian P. Van Grouw, DOGeneral orthopaedics
Renata V. Weber, MDHand & wrist
Erik C. Zachwieja, MDHip & knee
Long K. Bui-Le, PA-C, DMScPhysician Assistant
Jeffrey R. Lee, PA-CPhysician Assistant
Bryan D. Sheldon, PA-CPhysician Assistant
William G. Thomson, PA-CPhysician Assistant
Justin P. Van Grouw, PA-CPhysician Assistant
Patient stories
Orthopaedic care that puts patients first
“Dr. Noah Kirschner treated me for a torn hamstring. He is a brilliant doctor and so kind, compassionate and caring. I would recommend him to anyone in need of an orthopedist. Also the office staff in both Paramus and Fair Lawn locations are so efficient and friendly. GSOA is an outstanding practice!!”
Cornelia G. “The GSOA team was amazing. We were able to get my daughter in for evaluation immediately. The staff were all professional and the medical advice from Dr Shamash and Mrs Bui-Le was spot on.”
Stephen Q. “Recently saw Dr. Zachwieja for issues with my left knee as I was told he's the "knee guy." We agreed on a treatment plan to move to gel shots for my arthritis and lack of cartilage. He has an awesome bedside manner.”
Linda P. “I cannot speak highly enough about Dr. Weber. After years of unresolved pain due to soft tissue injuries caused by a car accident, she finally has been able to address the pain from the source... I wish there were more doctors like her around.”
Larry Z. “Staff is pleasant and helpful. Justin Van Grouw is very pleasant and thorough. He explained everything to me in a way I understood. I will recommend anyone who needs this service.”
Joanne F. “The doctor is very personable, patient, attentive, and a great listener and as a plus he speaks Spanish! The office staff were also very kind and friendly with me. Overall I had a wonderful time and will recommend to all my friends and family.”
Maria P.
Ready to be seen?
Request an appointment online and our team will call you back to schedule, or call us today.
Locations
Six convenient offices across New Jersey

Fair Lawn
Home of Garden State Surgical Center
28-04 Broadway
Fair Lawn, NJ 07410Mon–Thu 8–5 · Fri 8–4





Do you accept insurance?
Yes, we accept most major insurance plans across New Jersey. View our insurance list to check whether we accept your plan, or call us at 201-791-4434 for help confirming coverage.
Do you treat work-related injuries?
Yes. Work injuries are one of our core specialties. Injured workers, adjusters, and nurse case managers can call our dedicated workers’ compensation line at 201-475-0016.
Do you treat injuries from car accidents?
Yes. Please call us at 201-791-4434 before scheduling so we can confirm your coverage and payment arrangements. Please note that we don’t accept letters of protection.
Do I need a referral to see a GSOA orthopaedic specialist?
Many plans don’t require one, but some HMO plans do. If you have a referral from your primary care or family physician, bring it to your visit along with any X-rays, MRI, or CT reports.
What should I bring to my first visit?
Photo ID, insurance card, any referral, and recent X-rays, MRI, or CT reports.