About Keith M. Rinkus, MD, MS

Dr. Keith Rinkus is a Fellowship trained Orthopaedic Spine Surgeon specializing in treatments of the Lumbar, Thoracic, and Cervical regions of the Spine. At Orthocenter, Dr. Rinkus performs both surgical and nonsurgical treatments for his patients. Dr. Rinkus is affiliated with hospitals in the Hackensack Meridian, Saint Barnabas, and Mount Sinai Health Systems.

Dr. Rinkus is an expert in both surgical and nonsurgical treatments of the Spine including minimally invasive and outpatient spine procedures, disk replacements, decompressions as well as complex Adult Spinal Reconstruction and deformity correction procedures.

Before turning to medicine and surgery, Dr. Rinkus studied civil and environmental engineering, earning both a B.S. and an M.S. in Engineering. He later received his Medical Degree at Wake Forest University School of Medicine in Winston-Salem, NC. During medical school, Dr. Rinkus was the recipient of the Wake Forest Medical Alumni scholarship and was granted a National Institutes of Health Young Investigators Research Fellowship. 

In Dr. Rinkus’ pursuit of excellence, he completed an Orthopaedic Internship and Residency at Penn State College of Medicine in Hershey, PA where he received the Pfizer Scholars in Pain Management Award. He also completed a Fellowship in Orthopaedic Spine Surgery at Emory University Orthopaedics and Spine Hospital in Atlanta, GA. Dr. Rinkus is Certified by the American Board of Orthopaedic Surgery. He is an active member of the American Association of Orthopaedic Surgeons as well as the North American Spine Society. 

In addition to performing surgeries and treating spinal conditions, Dr. Rinkus enjoys hiking, biking, teaching, studying the spine and writing. He has written numerous scholarly articles and chapters about spinal disorders and Orthopaedic care.

About Qasim M. Husain, MD

Dr. Qasim M. Husain is a Board-Certified Orthopaedic Spine Surgeon at the Orthocenter. He received advanced training in the surgical and non-surgical management of the entire range of spinal disorders from degenerative conditions to complex spinal deformity. Dr. Husain has also undergone training in minimally invasive techniques, such as 'micro' surgery and percutaneous instrumentation, to address a variety of spinal disorders.

Dr. Husain received his undergraduate degree in Neurobiology from Cornell University and went to the Renaissance School of Medicine at Stony Brook University for his medical education. There he graduated with an M.D. degree with Recognition in Research and stayed on-board to complete his Surgical Internship as well as his Residency in Orthopaedic Surgery. As a junior resident he received the "Outstanding Resident" of the year award and was appointed as the Chief Administrative Resident in his final year.

Following residency, Dr. Husain was accepted to the NYU Hospital for Joint Diseases to complete his Fellowship training in Spine Surgery. There he was trained in the surgical and non-operative management of the full spectrum of spinal conditions by several of the pioneers in the field. Throughout his career, Dr. Husain has been actively involved in research and academics. Dr. Husain has multiple publications on a variety of topics related to spine surgery in peer-reviewed journals as well as textbooks.

Dr. Husain is a Diplomate of the American Board of Orthopaedic Surgery, a Fellow of the American Academy of Orthopaedic Surgeons, and an active member of the North American Spine Society.

Dr. Husain in the News

https://www.hackensackmeridianhealth.org/patient-perspectives/her-spinal-answer

Dr. Husain recently returned from a one-week long surgical mission trip to Honduras.

*Visit Dr. Husain's Profile on Healthgrades

Research and Publications

• Husain QM, Ewer J. Journal of Neurobiology. 2004 May;59(2):181-91. Use of targetable gfp-tagged neuropeptide for visualizing neuropeptide release following execution of a behavior.
• Husain QM, Korpi A, Krukenkamp IB. P2Y12 Receptor Inhibition Provides Cardioprotection Similar to Ischemic Preconditioning. Poster Presentation at the 2005 Scientific Sessions of the American Heart Association (AHA) in Dallas, Texas.
• Husain QM, Landry C, Carrion W. Intraoperative alpha-2 Adrenergic Agonists (Intravenous Dexmedetomidine and Epidural Clonidine) Aid Early Mobilization and Shorten Length of Stay (LOS) Following Posterior Spinal Fusion (PSF) for Adolescent Idiopathic Scoliosis (AIS). Poster displayed at the 17th Annual (2010) IMAST (International Meeting on Advanced Spine Techniques) in Toronto, Canada
• Husain QM, Spivak, JM. Surgical Management of Degenerative Spondylolisthesis. Textbook Chapter: Comprehensive Manual of Spine Care (Errico/Varlotta/Cheriyan)
• Husain QM, Toombs C, Lonner B, Sponseller P, Shufflebarger H, Shah SA, Samdani AF, Betz RR, Cahill PJ, Yaszay B, Newton PO. Spine Deformity. 2015 Jul;3(4);318-326. Body Mass Index in Adolescent Spinal Deformity: Comparison of Scheuermann’s Kyphosis, Adolescent Idiopathic Scoliosis, and Normal Controls.
• Husain QM, Poorman C, Passias P, Lonner B. The Inter and Intra-observer Reliability of the Risser Sign versus the Sanders Classification for the Estimation of Skeletal Maturity with Regards to Predicting Scoliotic Curve Progression. Poster Display at the American Academy of Orthopaedic Surgeons Annual Conference-2014
• Husain QM, Vira S, Jalai C, Paul J, Poorman GW, Poorman C, Yoon RS, Looze C, Lonner B, Passias PG. Journal of Pediatric Orthopaedics. 2017 Jun;37(4)246-249. The Interobserver and Intraobserver Reliability of the Sanders Classification Versus the Risser Stage.
• Ewer J, Campo M, Clark A. Journal of Neuroscience.  2004 April, 24(17):4283-92. Neuroendocrine Control of Larval Ecdysis Behavior in Drosophila: Complex Regulation by Partially Redundant Neuropeptides.
• Brennan, BJ. Ethology: International Journal of Behavioural Biology. 2007 July, 113(7): 692-702. Abdominal Wagging in the Social Paper Wasp Polistes dominulus: Behavior and Substrate Vibrations

Professional Memberships

• Diplomate American Board of Orthopaedic Surgeons
• Fellow of the American Academy of Orthopaedic Surgeons
• Active Member of North American Spine Society

Courtney Ellenberger, NP-C, MSN, RN, RNFA is a Certified Family Nurse Practitioner through the American Academy of Nurse Practitioners and Registered Nurse First Assist. She completed her undergraduate nursing education at Seton Hall University and continued on to earn her Masters Degree in Nursing at Monmouth University. She began her nursing career as a Registered Nurse in the Operating Room at Monmouth Medical Center where she did a majority of her work in Orthopedic Surgery.

Steve Paragioudakis, MD, is an experienced orthopedic spine surgeon at the Center for the Functional Restoration of the Spine, with locations in Shrewsbury, Toms River, and Edison, New Jersey.

Dr. Paragioudakis received his Bachelor of Arts from Johns Hopkins University and his medical degree from the Rutgers School of Biomedical and Health Sciences (RBHS), formerly the University of Medicine and Dentistry of New Jersey. Dr. Paragioudakis completed his internship and residency program at the RBHS in the Rutgers New Jersey Medical School Department of Orthopaedics.

Dr. Paragioudakis has received recognition for his research throughout his career, and his clinical science paper received the International Volvo Award for Low Back Pain Research in 2000. He is a member of the American Board of Orthopaedic Surgery, as well as the National Board of Medical Examiners.

In addition to serving patients at the Center for the Functional Restoration of the Spine, Dr. Paragioudakis provides care at Orthopaedic Spine Specialists of NJ.

CLICK HERE TO READ MORE ABOUT DR. PARAGIOUDAKIS

Marc Menkowitz, MD, is a fellowship-trained, board-certified orthopaedic spine surgeon who specializes in the operative and nonoperative treatment of adult and pediatric spinal disorders. He provides care to patients at the Center for the Functional Restoration of the Spine in Shrewsbury, Toms River, and Edison, New Jersey.

Dr. Menkowitz started his education at The Hill School, a prestigious secondary boarding school in Pottstown, Pennsylvania. He went on to graduate from the University of Pennsylvania in Philadelphia and earned his medical degree from the Lewis Katz School of Medicine at Temple University, also in Philadelphia. He completed his orthopaedic surgery training at the Monmouth Medical Center, one of the oldest programs in New Jersey. Afterward, Dr. Menkowitz completed his spine surgery fellowship at The New York Spine Institute at Beth Israel Deaconess Medical Center. 

Upon completing his fellowship, he moved back to Monmouth County, New Jersey, and together with another fellowship-trained spine surgeon, they established the Center for the Functional Restoration of the Spine. Concurrently, he was appointed to the academic committee of the Monmouth Orthopaedic Surgery program. He is also an assistant professor at Drexel University College of Medicine.

Dr. Menkowitz has co-authored several articles pertaining to spinal surgery, which have been presented at international meetings. His areas of expertise include the operative and nonoperative treatment of adult and pediatric spinal deformity, disc herniations, degenerative conditions of the spine, tumors, and sports-related injuries.

CLICK HERE TO READ MORE ABOUT DR. MENKOWITZ

David Dickerson, MD, is a highly trained, board-certified orthopaedic surgeon at Performance Orthopaedics and Sports Medicine in Wall Township, Toms River, and Shrewsbury, New Jersey. He specializes in an integrative approach to treating and managing sports injuries and pediatric injuries, as well as joint reconstruction.

A native of Louisiana, Dr. Dickerson graduated summa cum laude from the University of Louisiana, Lafayette, with a bachelor’s degree in biology. He then went on to earn his Doctor of Medicine from Louisiana State University’s School of Medicine in Shreveport, Louisiana. After completing his internship in Greenville, South Carolina, Dr. Dickerson completed a residency in orthopaedic surgery at Monmouth Medical Center in Long Branch, New Jersey. 

Dr. Dickerson’s training didn’t stop there. He continued honing his craft, narrowing in on sports medicine while studying at the Orthopaedic Foundation for Active Lifestyles in Connecticut and New York. 

In his professional career as an orthopaedic surgeon, Dr. Dickerson mainly specializes in arthroscopic and reconstructive procedures of the shoulder, knee, ankle, elbow, and hip. He also performs comprehensive total joint replacement and helps his adult and child patients manage traumatic bone and joint injuries. 

Throughout his career, Dr. Dickerson has developed many close personal relationships with patients who are eternally grateful for his compassion and personalized care. 

When he’s not in the office treating patients, Dr. Dickerson leads an active lifestyle, participating in car racing, running, and golf.

John P. Nolan, Jr., MD, is board-certified in both orthopaedic surgery and sports medicine. He is one of the founders of Mercer-Bucks Orthopaedics, with offices in Hamilton, and Lawrenceville, New Jersey, and Langhorne, Pennsylvania. 

Dr. Nolan grew up in Huntington Valley, Pennsylvania, and attended La Salle University. He earned his Doctor of Medicine at Thomas Jefferson University in Philadelphia, Pennsylvania. 

He completed his residency in orthopaedic surgery at the Medical College of Pennsylvania, where he earned an appointment as a clinical instructor and completed additional post-residency training in sports medicine at Temple University and the University of Pennsylvania. 

Dr. Nolan was appointed clinical instructor at the orthopaedic division of Laser Centers of America, where he developed laser instruments for use in arthroscopy. 

He has served on the medical executive committee of Capital Health (2002), the Board of Directors at Mercer County Surgical Center (2001-2012), and was the founding director of Ortho​​paedic Trauma at St. Mary Medical Center from 2012-2016. 

Dr. Nolan was one of the first surgeons in the Mercer Bucks area to perform outpatient total hip and knee replacements, as well as the use of computer navigation and robotic-assisted joint replacements. 

He currently serves on the medical advisory board of the Wellness Center at RWJ Hamilton.

Thomas Bills, MD, PhD, is a board-certified orthopaedic surgeon specializing in adult reconstructive surgery and general orthopaedics at Mercer-Bucks Orthopaedics in Hamilton, and Lawrenceville, New Jersey, and Langhorne, Pennsylvania. He is one of the founders of MBO.

Dr. Bills grew up in Trenton, New Jersey. He earned his bachelor’s degree in biology from Syracuse University in New York. He then moved to Thomas Jefferson University in Philadelphia, Pennsylvania, to complete a PhD in pharmacology and a Doctor of Medicine from Jefferson Medical College, now the Sidney Kimmel Medical College in Philadelphia.

He received advanced training in pediatric orthopaedics at Children's Hospital in Philadelphia; Trauma at Robert Wood Johnson Trauma Center in New Jersey; Joint Replacement at the Hospital for Special Surgery; Osteoporosis at Cornell Medical School; and Bone Tumor at Memorial Sloan Kettering Cancer Center in New York City, New York.

Dr. Bills is an active staff member of Capital Health Systems and Robert Wood Johnson University Hospital in New Brunswick, New Jersey, and an active attending staff at Lawrence Rehabilitation Center in Lawrenceville.

He is an associate staff member at St. Mary Medical Center in Langhorne, Pennsylvania. He serves on the research staff as a visiting scientist at The Hospital for Special Surgery in the Department of Orthopaedic Research at Cornell Medical School in New York City, New York.

He is a consulting staff physician at the Metabolic Bone Disease Service and Osteoporosis Center in the Hospital for Special Surgery at Cornell Medical School in New York City.

Dr. Bills is a member of the National Osteoporosis Foundation and a recognized Certified Fracture Liaison. He is a member of the International Osteoporosis Foundation and the International Society of Clinical Densitometry, where he maintains special certification as a Clinical Densitometrist.

Dr. Bills’s work is supported by the multiple honors and awards he has earned, his membership in various professional organizations, and an extensive bibliography and speaking engagement history.

Frank Colarusso, DO, is board-certified in physical medicine and rehabilitation at Mercer-Bucks Orthopaedics in Hamilton, Lawrenceville, and Princeton, New Jersey, and Langhorne, Pennsylvania. 

Dr. Colarusso maintains double-board certification, having recently recertified with both the American Medical Association, the American Board of Physical Medicine & Rehabilitation, and the American Osteopathic Association. With an attention to detail and passion for continuing education, Dr. Colarusso is proud to provide comprehensive non-operative musculoskeletal, spine, and sports medicine. 

He specializes in MSK neck and back pain, EMG services, acute and chronic pain syndromes with medication management, dry needling, Osteopathic Manual Manipulation treatments as well as ultrasound-guided injections, nerve blocks, and biologics.

After receiving honors at Rider University in Lawrenceville, New Jersey, and Philadelphia College of Osteopathic Medicine in Pennsylvania, Dr. Colarusso remained in Pennsylvania to intern at St. Barnabas Health Care System. He later was the chief resident in Physical Medicine and Rehabilitation at Boston University Medical Center in Massachusetts. 

Previously serving as one of three attending physicians at the 15th largest rehabilitation hospitals in the United States, Dr. Colarusso is proud to serve new and returning patients from the Mercer-Bucks Orthopaedics offices. 

David S. Eingorn, MD, is a board-certified ortho​​paedic surgeon specializing in adult reconstructive surgery and general orthopaedics. He is one of the founders of Mercer-Bucks Orthopaedics, with offices in Hamilton, and Lawrenceville, New Jersey, and Langhorne, Pennsylvania. 

Dr. Eingorn graduated with his bachelor's degree in biology from LaSalle University in Philadelphia, Pennsylvania, and received his medical degree from the Temple University School of Medicine in the same city. 

His internship in surgery was carried out at the Presbyterian University of Pennsylvania’s Medical Center and followed by his orthopaedic residency at Thomas Jefferson University Hospital. 

Dr. Eingorn has received recognition as a "top doc" in the region and holds the Universal Halo patent, which is used internationally for fractured spines. He also invented a hip jig for the DePuy Total Hip system. 

Dr. Eingorn continues to stay on top of the newest technologies in the field of ortho​​paedics. He is one of the few surgeons in the area that has trained and performs robotic-assisted surgeries. His hospital staff appointments include active staff status at Capital Health Systems at Hopewell and Regional Campuses in Trenton, New Jersey, and Robert Wood Johnson University Hospital at Hamilton in Hamilton, New Jersey. 

He also serves as an associate staff member at St. Mary Medical Center in Langhorne, Pennsylvania, a consultant for Lawrence Rehabilitation Center in Lawrenceville, New Jersey, and a research consultant for Zimmer Orthopaedics Corporation. 

Dr. Eingorn pioneered outpatient joint replacements in the area and developed an outpatient total joint replacement program at the Mercer County Surgery Center. Membership in several professional organizations, publications, and research are part of Dr. Eingorn’s ongoing professional development and success. 

His professional history spans a variety of experiences and responsibilities, including volunteer surgery duty during the 9/11/01 attacks of the World Trade Center in New York City.

Fredric Kleinbart, MD, is a board-certified orthopaedic surgeon working closely with patients at Mercer-Bucks Orthopaedics, with offices in Hamilton, Lawrenceville, and Princeton, New Jersey, and Langhorne, Pennsylvania. 

He was the former director of sports medicine and was an active member at Hahnemann University Hospital in Philadelphia, Pennsylvania. Additionally, he is an associate professor of orthopaedic surgery at Drexel University College of Medicine. 

He has a Certificate of Added Qualification in Sports Medicine, and for the last five years, he has been an associate master instructor of arthroscopy at the Ortho​​paedic Learning Center, which allows him to teach arthroscopies nationally. 

A graduate of the University of Pennsylvania School of Medicine, Dr. Kleinbart completed his residency training in orthopaedic surgery at Kingsbrook Jewish- Beth Israel Medical Centers and his sports medicine fellowship at Temple University Hospital. 

Dr. Kleinbart’s USA Olympic experience includes serving as the orthopaedic surgeon at the San Diego Olympic training center, as a ringside physician for USA Boxing, and a ringside physician for the Olympic boxing trials. 

He was the head orthopaedic surgeon and co-team physician for Drexel University. He was also the orthopaedic consultant for the American Repertory Ballet and the Princeton Ballet School and has a long history as a team physician for various collegiate and high school teams. 

Dr. Kleinbart has been instrumental in creating specialty sports clinics, including the Arts Medicine Center, the Women’s Sports Medicine Center, and the Pediatric Sports Medicine clinics at Hahnemann University Hospital and the Drexel University College of Medicine. 

Dr. Kleinbart established the Hahnemann University Hospital and Drexel Sports Medicine Arthroscopy lab and is an associate master instructor for various national arthroscopy courses. Currently, he is the Medical Director at Mercer County Surgery Center. 

He frequently lectures on such varied topics as “The Weekend Warrior,” “The Female Athlete," and “Common Orthopaedic Injuries”. He has a special interest in shoulder and knee reconstruction and the Female Triad.

Paul W. Codjoe, MD, is a skilled, board-certified orthopaedic surgeon at Mercer-Bucks Orthopaedics in Hamilton, Lawrenceville, and Princeton, New Jersey, and Langhorne, Pennsylvania. He is currently the President of Mercer-Bucks Orthopaedics. 

Dr. Codjoe joined Mercer-Bucks Orthopaedics after spending a year in private practice and another year in fellowship training at the world-renowned Hughston Clinic in Columbus, Georgia. During his fellowship, Dr. Codjoe specialized in arthroscopic surgery and minimally invasive joint reconstructive procedures of the knee and shoulder. Board-certified by the American Academy of Orthopaedic Surgeons, Dr. Codjoe enjoys treating general orthopaedic and sports medicine patients. 

Born in Accra, Ghana, Dr. Codjoe came to the United States in 1989. He earned his bachelor’s degree from Rutgers University in New Brunswick, New Jersey, and subsequently earned his medical degree at Rutgers’ Robert Wood Johnson Medical School. He finished his internship in general surgery and residency in orthopaedic surgery at Temple University Hospital in Philadelphia, Pennsylvania. 

During his training, Dr. Codjoe served as team physician for several high schools and a semi-professional hockey team. A presenter and author on various medical subjects, Dr. Codjoe is a proud member of several organizations, including the American Academy of Orthopaedic Surgeons, the American Orthopaedic Society for Sports Medicine, the New Jersey Orthopaedic Society, and the Pennsylvania Orthopaedic Society.

Dr. Codjoe looks forward to welcoming new and returning patients to the Mercer-Bucks Orthopaedics offices. 

Marc Zac Handler, MD, is an acclaimed lecturer and a board-certified academic dermatologist at Kessel Dermatology in Hamilton Square, New Jersey. He is a member of Alpha Omega Alpha Honor Medical Society. Dr. Handler is also an assistant clinical professor in dermatology at Rutgers University New Jersey Medical School. 

He served as a Fellow in the United States House of Representatives and crafted cost-neutral legislation to combat HIV infection. He has received the Congressional Recognition Award three times from bipartisan House members for his work on health care policy and was named a Nebraska Admiral, by the Governor of the State of Nebraska, in recognition of service to the community. He has experience with medical news production, having worked with Sanjay Gupta, MD, at CNN’s medical unit, assisting with medical programming. Additionally, he has been a medical contributor for the Discovery Health program, “Dr. G: Medical Examiner.”

Dr. Handler is a recipient of the prestigious Tatotsu Imaeda, MD, PhD, Academic Scholar Award for his extensive academic work, which includes greater than 30 peer-reviewed publications and five book chapters. Dr. Handler is the only person to be the first author of back-to-back cover articles in the Journal of the American Academy of Dermatology, the leading American journal specializing in dermatology.

Focused on improving health care access both locally and abroad, Dr. Handler has provided volunteer medical care with Project MediShare in earthquake-stricken Port-au-Prince, Haiti. His experience in Haiti led to an invitation to assist the House Foreign Affairs Committee, in Washington, DC, on USAID expenditures. He has since been a volunteer physician at the HIV hospital in Accra, Ghana, and a volunteer Emergency Medical Technician (EMT) in Hoboken, New Jersey. 

Dr. Handler has been an invited guest lecturer around the globe, including Montenegro, New York, Miami, Kuwait, Iran, and Jordan. Dr. Handler holds a Bachelor of Science from the University of California, San Diego, and received his Doctor of Medicine from the University of Nebraska. Dr. Handler completed a research fellowship in pediatric dermatology at the University of Miami with department chairman Dr. Lawrence Schachner, author of Pediatric Dermatology. He completed his residency in dermatology at Rutgers University with Dr. Robert A. Schwartz, providing needed care for the underserved patients of Newark, New Jersey, and military veterans at the East Orange Veterans hospital. He was selected to serve as the program’s Chief Resident during his senior year. He completed a Mohs micrographic surgery and procedural dermatology fellowship at Skin Laser & Surgery Specialists of NY and NJ under the direction of Dr. David J. Goldberg.

Paul Codjoe, MD, is a board-certified orthopedic surgeon at Mercer-Bucks Orthopaedics, serving patients in Hamilton, Princeton, and Lawrenceville, New Jersey, as well as in Langhorne, Pennsylvania. Dr. Codjoe is passionate about sports medicine and specializes in knee and shoulder injuries, including ACL tears, rotator cuff tears, knee and shoulder arthritis, and shoulder reconstruction.

Whether a patient is a high-performance athlete, a weekend warrior, or pursues an active lifestyle, Dr. Codjoe treats them uniquely and customizes their treatment to help them reach their full potential and enjoy a pain-free life.

After graduating with a Bachelor of Arts in Biology from Rutgers University in New Jersey, Dr. Codjoe received his Doctor of Medicine from the Rutgers Robert Wood Johnson Medical School in New Brunswick, New Jersey. He went on to complete an orthopedic surgery residency at Temple University Hospital in Philadelphia, Pennsylvania, and fellowship training in sports medicine at the Hughston Clinic in Columbus, Georgia, an internationally recognized center of excellence.

Dr. Codjoe maintains active membership in numerous professional organizations, including the American Academy of Orthopaedic Surgeons, the American Orthopaedic Society for Sports Medicine, the Arthroscopy Association of North America, and the American Academy of Regenerative Medicine. He holds medical licenses in six states and performs independent medical evaluations for workers' compensation claims.

Dedicated to staying at the forefront of emerging technologies and research for treatment protocols and surgical procedures, Dr. Codjoe was an early provider of OrthAlign, a computer-assisted surgical tool for precision joint replacement. He was also one of the initial surgeons to perform anterolateral ligament reconstruction, a complex surgical procedure to improve rotational stability in the knee.

Dr. Codjoe has been an attending physician and has served for more than 10 years as the director of the Sports Medicine and the Internal Medicine Residency Program at Capital Health Hospitals in Central New Jersey. He has been honored to work with renowned experts at the top clinics and facilities in the United States, including the Hughston Clinic, Robert Wood Johnson Hospital, and Temple University Hospital.

People of every age and fitness level receive exceptional care from Dr. Codjoe. His goal is to put each patient first and provide compassionate care that eliminates pain and restores mobility, function, and strength.

Frank Colarusso, DO, is board-certified in physical medicine and rehabilitation at Mercer-Bucks Orthopaedics in Hamilton, Lawrenceville, and Princeton, New Jersey, and Langhorne, Pennsylvania. 

Dr. Colarusso maintains double-board certification, having recently recertified with both the American Medical Association, the American Board of Physical Medicine & Rehabilitation, and the American Osteopathic Association. With an attention to detail and passion for continuing education, Dr. Colarusso is proud to provide comprehensive non-operative musculoskeletal, spine, and sports medicine. 

He specializes in MSK neck and back pain, EMG services, acute and chronic pain syndromes with medication management, dry needling, Osteopathic Manual Manipulation treatments as well as ultrasound-guided injections, nerve blocks, and biologics.

After receiving honors at Rider University in Lawrenceville, New Jersey, and Philadelphia College of Osteopathic Medicine in Pennsylvania, Dr. Colarusso remained in Pennsylvania to intern at St. Barnabas Health Care System. He later was the chief resident in Physical Medicine and Rehabilitation at Boston University Medical Center in Massachusetts. 

Previously serving as one of three attending physicians at the 15th largest rehabilitation hospitals in the United States, Dr. Colarusso is proud to serve new and returning patients from the Mercer-Bucks Orthopaedics offices. 

Fredric Kleinbart, MD, is a board-certified orthopaedic surgeon working closely with patients at Mercer-Bucks Orthopaedics, with offices in Hamilton, Lawrenceville, and Princeton, New Jersey, and Langhorne, Pennsylvania. 

He was the former director of sports medicine and was an active member at Hahnemann University Hospital in Philadelphia, Pennsylvania. Additionally, he is an associate professor of orthopaedic surgery at Drexel University College of Medicine. 

He has a Certificate of Added Qualification in Sports Medicine, and for the last five years, he has been an associate master instructor of arthroscopy at the Ortho​​paedic Learning Center, which allows him to teach arthroscopies nationally. 

A graduate of the University of Pennsylvania School of Medicine, Dr. Kleinbart completed his residency training in orthopaedic surgery at Kingsbrook Jewish- Beth Israel Medical Centers and his sports medicine fellowship at Temple University Hospital. 

Dr. Kleinbart’s USA Olympic experience includes serving as the orthopaedic surgeon at the San Diego Olympic training center, as a ringside physician for USA Boxing, and a ringside physician for the Olympic boxing trials. 

He was the head orthopaedic surgeon and co-team physician for Drexel University. He was also the orthopaedic consultant for the American Repertory Ballet and the Princeton Ballet School and has a long history as a team physician for various collegiate and high school teams. 

Dr. Kleinbart has been instrumental in creating specialty sports clinics, including the Arts Medicine Center, the Women’s Sports Medicine Center, and the Pediatric Sports Medicine clinics at Hahnemann University Hospital and the Drexel University College of Medicine. 

Dr. Kleinbart established the Hahnemann University Hospital and Drexel Sports Medicine Arthroscopy lab and is an associate master instructor for various national arthroscopy courses. Currently, he is the Medical Director at Mercer County Surgery Center. 

He frequently lectures on such varied topics as “The Weekend Warrior,” “The Female Athlete," and “Common Orthopaedic Injuries”. He has a special interest in shoulder and knee reconstruction and the Female Triad.

John P. Nolan, Jr., MD, is board-certified in both orthopaedic surgery and sports medicine. He is one of the founders of Mercer-Bucks Orthopaedics, with offices in Hamilton, and Lawrenceville, New Jersey, and Langhorne, Pennsylvania. 

Dr. Nolan grew up in Huntington Valley, Pennsylvania, and attended La Salle University. He earned his Doctor of Medicine at Thomas Jefferson University in Philadelphia, Pennsylvania. 

He completed his residency in orthopaedic surgery at the Medical College of Pennsylvania, where he earned an appointment as a clinical instructor and completed additional post-residency training in sports medicine at Temple University and the University of Pennsylvania. 

Dr. Nolan was appointed clinical instructor at the orthopaedic division of Laser Centers of America, where he developed laser instruments for use in arthroscopy. 

He has served on the medical executive committee of Capital Health (2002), the Board of Directors at Mercer County Surgical Center (2001-2012), and was the founding director of Ortho​​paedic Trauma at St. Mary Medical Center from 2012-2016. 

Dr. Nolan was one of the first surgeons in the Mercer Bucks area to perform outpatient total hip and knee replacements, as well as the use of computer navigation and robotic-assisted joint replacements. 

He currently serves on the medical advisory board of the Wellness Center at RWJ Hamilton.