285 Sills Road, Building 18, Patchogue, NY 11772
31 Main Road, Suite 3, Riverhead, NY 11901
2500 Nesconset Hwy, Building 20-A, Stony Brook, NY 11790
Phone (631) 475-1224 /  Fax (631) 475-1588

Meet Our Specialists

Our Physicians


Dr. KleemanBarry C. Kleeman, MD, FAAOS

Board-Certified Orthopedic Surgeon with
Subspecialty Certification in Orthopedic Sports Medicine
  • Sports Medicine/Arthroscopy
  • ACL and Meniscus Surgery
  • Joint Replacement Surgery
  • Rotator Cuff Repair
  • Pediatric and Adult Fracture Care
  • General Orthopedics

Dr. RitterRichard A. Ritter, MD, FAAOS

Board-Certified Orthopedic Surgeon with
Fellowship Training in Orthopedic Sports Medicine
  • Sports Medicine/Arthroscopy
  • ACL and Meniscus Surgery
  • Rotator Cuff Repair
  • Joint Replacement Surgery
  • Pediatric and Adult Fracture Care
  • General Orthopedics

Dr. FingerAlexander S. Finger, MD, FAAOS

Board-Certified Orthopedic Surgeon
  • Joint Replacement Surgery
  • Minimally Invasive Surgery
  • Arthroscopy/Meniscus Surgery
  • Pediatric and Adult Fracture Care
  • Ligament and Tendon Repair
  • General Orthopedics

Dr. SchwarzbardItchak Schwarzbard, MD, MS, FAAOS

Board-Certified Orthopedic Surgeon with
Subspecialty Certification in Surgery of the Hand
  • Hand, Wrist and Upper Extremity Surgery
  • Small Joint Arthroscopy and Joint Replacement
  • Endoscopic Carpal Tunnel and Cubital Tunnel Surgery
  • Ligament, Tendon and Nerve Repair/Microsurgery
  • Pediatric and Adult Fracture Care
  • General Orthopedics

Dr. ManoffEric M. Manoff, MD, FAAOS

Board-Certified Orthopedic Surgeon with
Subspecialty Certification in Orthopaedic Sports Medicine
  • Sports Medicine/Arthroscopy
  • ACL and Meniscus Surgery
  • Rotator Cuff Repair
  • Pediatric and Adult Fracture Care
  • Operative and Nonoperative Arthritis Treatment
  • General Orthopedics

Dr. KincaidBrian G. Kincaid Jr., MD

Board-Certified Orthopedic Surgeon with Subspecialty Certification in Surgery of the Hand
  • Hand, Wrist and Upper Extremity Surgery
  • Small Joint Arthroscopy and Joint Replacement
  • Carpal Tunnel Release and Cubital Tunnel Release Surgery
  • Ligament, Tendon and Nerve Repair/Microsurgery
  • Complex Upper Extremity Trauma
  • General Orthopedics

Dr. LanzoneAndrew Lanzone, DO

Board-Certified Primary Care Sports Medicine Physician
  • Diagnosis and Treatment of All Sports Related Injuries
  • Musculoskeletal Pathologies
  • Non-Operative Treatments and Modalities such as OMT, Musculoskeletal Ultrasound, and Injection Therapy
  • Diagnosis and Management of Concussion

Dr. KeaneKyle J. Keane, DO

Board-Certified Primary Care Sports Medicine Physician
  • Diagnosis and Treatment of All Sports Related Injuries
  • Musculoskeletal Pathologies
  • Non-Operative Treatments and Modalities such as OMT, Musculoskeletal Ultrasound, and Injection Therapy
  • Diagnosis and Management of Concussion

Our Physician Assistants


Nancy Tengelsen, PA-C

Physician Assistant, Certified

Nancy Tengelsen is a nationally board-certified Physician Assistant who joined Advanced Orthopedics in January 2013. She received her Master in Physician Assistant Studies at Touro College, in Bay Shore, New York in September 2012. Prior to obtaining her degree in Physician Assistant studies, she obtained a Bachelor Degree in Human Biology at the University at Albany in New York.

Nancy is an active member in American Academy of Physician Assistants (AAPA).

John Dalton, PA-C, ATC

Physician Assistant, Certified
Athletic Trainer, Certified

John Dalton is a nationally board-certified Physician Assistant who joined Advanced Orthopedics in July 2013. He received his Master’s Degree in Physician Assistant Studies at New York Institute of Technology in Westbury, New York in May 2013. Prior to obtaining his degree in Physician Assistant studies, he obtained a Bachelor’s Degree in Athletic Training at The State University of New York at Cortland. John worked with local high schools and colleges covering athletic contests, evaluating, and treating student athletes as a Certified Athletic Trainer before finding his calling as a Physician Assistant.

John is an active member in American Academy of Physician Assistants (AAPA) and National Athletic Training Association (NATA).

Steven R. Esposito, PA-C

Steven R. Esposito, PA-C

Physician Assistant, Certified

Steven Esposito is a nationally board-certified Physician Assistant who joined Advanced Orthopedics in August of 2014. He received his Master's in Physician Assistant Studies at Springfield College in Springfield, Massachusetts in May 2014. Prior to obtaining his degree in Physician Assistant Studies, he graduated cum laude with a Bachelor's Degree in Health Sciences at Springfield College.

Steven is an active member in the American Academy of Physician Assistants (AAPA).

Brian Powers, PA-C

Brian Powers, PA-C

Physician Assistant, Certified

Brian Powers is a nationally board-certified Physician Assistant who joined Advanced Orthopedics in September of 2017. He received his Master's in Physician Assistant Studies at Stony Brook University. Prior to obtaining his degree in Physician Assistant Studies, he graduated from University at Albany with a B.S. in Biology.

Brian is an active member in the American Academy of Physician Assistants (AAPA) and the New York State Society of Physician Assistants (NYSSPA).

Anthony Nunziato, PA-C

Anthony Nunziato, PA-C

Physician Assistant, Certified

Anthony Nunziato is a nationally board-certified Physician Assistant who joined Advanced Orthopedics in November of 2017. He received his Master's in Physician Assistant Studies at Touro College. Prior to obtaining his degree in Physician Assistant Studies, he graduated from Lander University in Greenwood, SC with a B.S. in Exercise Science and with Summa Cum Laude. Anthony was also a professional baseball player as the starting shortstop for the Washington Wild Things for two seasons. Anthony is also a Certified Strength and Conditioning Coach.

Anthony is an active member in the American Academy of Physician Assistants (AAPA).

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