About Our Physicians

Dr. Ross Nathan, The Hand & Wrist Center

Dr. Ross Nathan

Dr. Ross Nathan is a board-certified Diplomate of the American Board of Orthopedic Surgery (www.aaos.org).  Dr. Nathan specializes in the evaluation and treatment of all disorders related to the hand and wrist. He is an active member at Long Beach Memorial Medical Center, where he was the Chairman of the Department of Orthopedic Surgery. Dr. Nathan is also an active partner at the Surgery Center of Long Beach.

Dr. Nathan was born in Reseda, California. He received a Bachelor of Science at the University of California at Irvine, where he graduated with Honors. After receiving his Medical Degree at Baylor College of Medicine in Houston, Texas, Dr. Nathan trained at the prestigious New York University/Bellevue Medical Center, where he completed his Surgery Internship and Orthopedic residency.

Following his residency training, Dr. Nathan achieved further specialized training at the Philadelphia Hand Center at Thomas Jefferson University Hospital, where he completed his hand fellowship under the Doctors Larry Schneider and James Hunter. Dr. Nathan received his Certificate of Added Qualification in Surgery of the Hand (www.assh.org). He also received further experience and training in microvascular surgery at the University of California at San Francisco, before establishing himself in Long Beach, California.

Dr. Nathan lecturing on hand surgery in Nairobi, KenyaIn addition to his involvement in training medical students and other physicians-in-training, Dr. Nathan has lectured at international, national, and regional meetings. He has been an invited guest lecturer at Kenyatta National Hospital in Nairobi, Kenya, where he provided a special hand surgery symposium, and also provided a “hands-on” surgical demonstration to the physicians at this institution.

In the past several years, Dr. Nathan has participated in Operation Rainbow, a non-profit organization, which provides surgical care and training to third-world countries. He has traveled with this group several times to Guatemala, sharing his expertise in treating infants and young children with congenital hand deformities.

And before opening The Hand & Wrist Center in 2006, Dr. Nathan was an associate (in practice) at Hand Surgery Consultants, in Long Beach, California, for 16 years. Today, in addition to running his own practice and occupational therapy facility, Dr. Nathan continues to participate in further medical research involving Spinal Cord Injury reconstructive surgery, as well as other medical-community events.

We invite you to view Dr. Nathan’s Curriculum Vitae.

Teaching appointments

From 1989 through 1990, Dr. Nathan was a Clinical Instructor in the Department of Orthopedic Surgery at the University of California, San Francisco. During that period, he was involved in both clinical teaching and laboratory research in the Hand and Microvascular section of the Orthopedic Surgery Department.

From 1992 through 1999, Dr. Nathan was an Associate Clinical Professor of Orthopedic Surgery at Harbor/UCLA Medical Center, as well as the Chief of the Hand Surgery Section.

Today, Dr. Nathan participates in the University of California at Irvine (UCI) plastic surgery fellowship program, where he has been appointed as an Assistant Clinical Professor of Plastic Surgery. His involvement includes teaching residents and fellows hand surgery procedures, as well as clinical office practice.


Dr. Kourosh M. Kolahi, The Hand & Wrist Center

Dr. Kourosh M. Kolahi

Dr. Kolahi is an honors graduate of the University of California, Berkeley, who studied for his Doctorate of Medicine at the University of Buffalo and has successfully passed his American Board of Orthopedic Surgery certification examination. Dr. Kolahi obtained additional specialized hand and upper extremity training at the University of New Mexico. He completed his orthopedic surgery residency at the University of California, San Francisco (UCSF) Fresno, where he received a Resident Scholar Award, as well as the “Resident of The Year Award” twice!

Dr. Kolahi’s professional work has been presented at, and published by, multiple medical institutions, including the New Mexico Journal of Orthopaedics, the Journal of Shoulder and Elbow Surgery, Clinics in Surgery, the Central California Research Symposium, the OREF/ORS Pacific Coast Resident Research Symposium, and the University of California, Berkeley College of Natural Resources. He has also held leadership positions with the Fresno Graduate Medical Education Committee at the University of California, San Francisco, and the University at Buffalo Medical Student Government.

Today, Dr. Kolahi is an outstanding member of the Southern California orthopedic community. His expertise includes bone and soft tissue disorders (related to trauma, sports injuries, overuse, arthritis, and age-related degeneration), microsurgical techniques, and minimally invasive and invasive surgical techniques. He treats patients of all ages and walks of life. Dr. Kolahi also provides medical expert services for medical-legal and other personal injury cases.

In addition to his professional services, Dr. Kolahi is also actively involved in providing community service. He has served as a clinical volunteer for Child Family Health International and at local (free) community clinics. He has also served as a volunteer Athletics Physician for local high schools and has also been involved in charity fundraising.

Dr. Kolahi is committed to providing the highest quality of care to his patients. We invite you to contact our Center to schedule an appointment with Dr. Kolahi!

I chose to specialize in Hand and Upper Extremity because this is the most elegant instrument that I know exists. Our hands are so versatile and they allow us to do so many different things. We have this fine sense in our fingertips that we instantly know what we are feeling and we can adapt without even thinking about it. It’s not only mechanical – there is something deeply personal about our hands. These are what we use to hold a loved one’s hand, hug our kids or make a personalized pizza with them! I am committed to seeing you thrive and it is my privilege to be entrusted with your care.” – Dr. Kolahi


Dr. George A. Macer, The Hand & Wrist Center

Dr. George A. Macer

Dr. George A. Macer, Jr. is a board-certified orthopedic surgeon and is President and CEO of George A. Macer, Jr. Medical Corporation. Dr. Macer joined The Hand & Wrist Center in January 2007.

Dr. Macer was born and raised in Pasadena, California, where he grew up in a medical family. His father was a physician in Pasadena for 50 years and his siblings also currently practice medicine in Los Angeles County.

After attending primary and secondary school in his hometown, he completed his undergraduate training, medical school, and orthopedic residency at the University of Southern California. Dr. Macer completed the renowned Joseph Boyes hand fellowship at Orthopaedic Hospital in Los Angeles, California. There, he trained under Doctors Joseph Boyes, Herbert Stark, and C. Ray Ashworth, among other well-known hand surgeons.

Dr. Macer is certified by the American Board of Orthopedic Surgery with a Certificate of Added Qualifications in surgery of the hand.

He is a fellow in the American Academy of Orthopedic Surgery, an active member of the American Society for Surgery of the Hand, Western Orthopedic Association and California Orthopedic Association. He also completed a four-year term as President of the Southern California Society for Surgery of the Hand.

Dr. Macer had been practicing hand and upper extremity surgery in Long Beach, California since 1983, and he had also been affiliated with the Kerlan-Jobe Orthopedic Clinic. He had also practiced with other physicians at Cedars Sinai Medical Center in Los Angeles, California.

He has held teaching positions in the department of orthopedic surgery at the Keck School of Medicine at USC. He has also been on teaching staff at Harbor UCLA Medical Center and currently holds teaching positions at USC and UC Irvine.

Dr. Macer served as Chairman of the Department of Orthopedics at St. Mary Medical Center, Long Beach, and the Orthopedic Executive Board at Long Beach Memorial Medical Center.

He has trained and worked internationally, including in Mexico, Australia, and New Zealand, and he has lectured widely to doctors in training, nurses and therapists, as well as in the arena of workers’ compensation. He has presented numerous hand surgery papers at national meetings.

Although he has retired from his clinical practice effective January 1, 2019, Dr. Macer continues to provide his professional services to the medical-legal community.

We invite you to view Dr. Macer’s Curriculum Vitae.

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