
Serving the New York, NY community, Michael P. Ast is a MD specializing in Knee Replacement, ACL Reconstruction, Meniscus Repair, Knee Arthroscopy, Cartilage Restoration. Michael evaluates and treats patients with knee injuries, arthritis, and conditions requiring surgical or non-surgical management. Dr. Michael P. Ast is Chief of the Knee Service, Chief Medical Innovation Officer, and Director of Ambulatory Surgery Center Strategy at Hospital for Special Surgery — the #1 ranked orthopedic hospital in the United States. He specializes in partial and total knee replacement, robotic-assisted surgery, and rapid-recovery outpatient joint replacement. Dr. Ast holds the John N. Insall Chair in Knee Surgery at HSS.
Board-certified Orthopedic Surgeons are specialists in the diagnosis, treatment, and surgical management of knee conditions. With 5 years of residency training and often additional fellowship specialization, they perform knee replacements, ligament reconstructions, meniscus repairs, and minimally invasive arthroscopic procedures.
Considering knee replacement? Call (201) 599-8056 to book a consultation with Michael P. Ast in New York, NY.
Total knee replacement (arthroplasty) replaces damaged cartilage and bone with metal and plastic components. The procedure relieves chronic pain and restores mobility for patients with severe arthritis or injury. Modern implants last 20-25 years with a 95%+ success rate.
ACL reconstruction replaces a torn anterior cruciate ligament using a tissue graft from the patient or donor. This arthroscopic procedure restores knee stability and allows return to sports and active lifestyles. Most patients return to full activity within 6-9 months.
Meniscus surgery treats tears in the cartilage that cushions the knee joint. Depending on the tear type and location, surgeons may repair the meniscus with sutures or remove damaged tissue (meniscectomy). Arthroscopic meniscus surgery is minimally invasive with quick recovery.
Knee arthroscopy is a minimally invasive procedure using a tiny camera and instruments through small incisions. It can diagnose and treat multiple conditions including cartilage damage, loose bodies, and inflammation. Patients typically go home the same day.
Cartilage restoration procedures regenerate or replace damaged knee cartilage to prevent or delay joint replacement. Options include microfracture, OATS (osteochondral autograft), ACI (autologous chondrocyte implantation), and newer scaffold-based techniques.



| Monday | 8:00 AM - 5:00 PM |
| Tuesday (Today) | 8:00 AM - 5:00 PM |
| Wednesday | 8:00 AM - 5:00 PM |
| Thursday | 8:00 AM - 5:00 PM |
| Friday | 8:00 AM - 4:00 PM |
| Saturday | Closed |
| Sunday | Closed |
| Procedure | Price |
|---|---|
| Total Knee Replacement | undefined |
| Partial Knee Replacement | undefined |
| Robotic-Assisted Knee Replacement | undefined |
| Knee Arthroscopy | undefined |
Prices shown are provided by the practice and may vary. Contact the office directly for a personalized quote.

Dr. Ast performed my total knee replacement and I had an excellent recovery. I never once needed opioid pain medications — just Tylenol. His rapid-recovery protocol is incredible. I was walking the same day.
After a 7 AM surgery, I was home and walking up 15 steps to my condo by 3:30 the same afternoon. Within 9 days there was no pain, no swelling, and no limp. Dr. Ast and his team at HSS are truly world-class.
I was walking 5 miles within weeks of my knee replacement. Dr. Ast explained every step of the process clearly before surgery and his team at HSS was outstanding from pre-op to physical therapy. Could not recommend him more highly.
As someone who was terrified of knee surgery, Dr. Ast put me completely at ease. He uses the latest robotic technology and the precision showed in my results. I am back to playing golf in 3 months. The man is a genius at what he does.
Excellent surgical outcome — my knee feels better than it has in years. The only downside was the wait time for appointments, but given he is Chief of the Knee Service at HSS and one of the busiest surgeons in the country, that is totally understandable. Worth every minute of the wait.
Average knee replacement in New York: $50,000 vs national average $45,000
Costs vary by provider, insurance, and case complexity. Contact Michael P. Ast at (201) 599-8056 for a consultation.