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Orthopedic Surgeons


Nirav H. Amin, MD

Dr. Amin, MD, specializes in sports medicine and adult knee reconstruction, as well as total knee and complex knee revisions. He completed his medical education and residency at Drexel University College of Medicine, followed by dual fellowships at Cleveland Clinic and Lenox Hill Hospital. With involvement in over nine projects and Food and Drug Administration studies, Dr. Amin's induction into the American Shoulder and Elbow Surgeons Society underscores his dedication to advancing orthopedic care. Leading protocols on opioid-sparing techniques, Dr. Amin ensures optimal patient experiences through innovative approaches like in-office arthroscopy, cryoneurolysis, and opioid minimization, offering unique solutions including mechenzymal cell treatment and platelet-rich plasma (PRP).

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Afshin Arianjam, MD

Dr. Arianjam, MD, is a board-certified orthopedic surgeon specializing in Sports Medicine, Arthroscopy, and Joint Replacements. He graduated as a Renaissance Scholar magna cum laude at the University of Southern California. Dr. Arianjam then completed his medical training at the Keck School of Medicine at USC before attending the San Francisco Orthopedic Residency Program.

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Hrayr G. Basmajian, MD

Dr. Basmajian, MD, was recruited to Pomona Valley Hospital Medical Center (PVHMC) from his previous position as the Chair of Orthopaedic Trauma at Loma Linda UniversMedical Center. He was brought to PVHMC to help build and create the Orthopaedic Trauma program nationwide. Dr. Basmajian also performs anterhip replacements making him part of the Joint Replacement Program at PVHMC.

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Christopher B. Hayes, MD

Dr. Hayes, MD, is a board-certified orthopedic surgeon who excels in trauma surgery, including complex pelvic and acetabular trauma, nonunion, deformity correction, and foot and ankle reconstructive surgery. With degrees from SUNY Geneseo and the University of Buffalo, he trained at the University of Kentucky Medical Center and the University of California, Davis, focusing on state-of-the-art, innovative treatments. Emphasizing individualized care, he utilizes advanced techniques to expedite patient recovery and their return to regular function.

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Peter Hahn, MD

Dr. Peter Hahn, MD, is a pediatric orthopedic surgeon specializing in pediatric orthopedic conditions. He has a keen interest in pediatric and adolescent spine/hip disorders, cerebral palsy, foot/ankle disorders, and orthopedic trauma. Dr. Hahn earned his undergraduate degree in Neuroscience from UCLA and his medical degree from UC Irvine. He completed his general orthopedic residency at UC Irvine Medical Center and a pediatric orthopedic fellowship at Rady Children’s Hospital in San Diego. Dr. Hahn is actively involved in resident education at UC Irvine and is a member of the American Academy of Orthopedic Surgeons and the Pediatric Orthopedic Society of North America.

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Neeraj Gupta, MD

Neeraj Gupta, MD, has obtained diverse training in all aspects of orthopedic surgery at the University of Southern California. He is also dual fellowship trained in orthopedic trauma/joints/reconstructive surgery from Cedar's Sinai Medical Center and in sports medicine from the San Diego Kaiser Sports Medicine Fellowship.

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Kunal P. Kalra, MD

Dr. Kalra, MD, is a board-certified orthopedic surgeon specializing in sports medicine and shoulder surgeries. Some of the surgeries he regularly performs include shoulder replacements, rotator cuff repairs, shoulder ligament repairs, knee ligament repairs, elbow arthroscopy, biceps repair, and cartilage restoration procedures. He prioritizes the highest quality patient care, emphasizing evidence-based treatments and non-surgical management before recommending surgery. Dr. Kalra believes in educating patients about their diagnosis and treatment options, involving them as much as possible in the decision-making process. He completed his medical education at Grant Medical College (University of Bombay), one of India's most prestigious medical schools, and his residency in Orthopedics at T.N. Medical College (University of Bombay). Dr. Kalra pursued fellowships in orthopedic sports medicine and shoulder surgery at the Hospital for Joint Diseases and Lenox Hill Hospital in New York. He also trained at the University of California, San Francisco, and Massachusetts General Hospital, Boston. Additionally, he completed a shoulder and knee fellowship in Paris, France.

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Gregory Lercel, MD

Gregory Lercel, MD, is a board-certified orthopedist who specializes in sports medicine, arthroscopic surgery, joint replacements and orthopedic trauma. After completing his Bachelor of Science degree in biology from the University of California, San Diego, Dr. Lercel went on to receive his Medical Doctorate degree from The George Washington University in Washington, D.C.

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Ryan R. Mayer, MD

Dr. Mayer, MD, is a board-certified orthopedic trauma surgeon specializing in Orthopedic Fracture and Complex Reconstructions. He earned his Bachelor of Science and Medical Degree from the University of California, Irvine, and completed his Orthopedic Surgery residency at the University of Kentucky, followed by a fellowship in Orthopedic Trauma at the University of Texas Health Science Center at Houston. Dr. Mayer emphasizes tailored treatment, employing both conservative and surgical management to promote patient healing and a return to function.

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Ryan E. Miller, MD

Dr. Miller, MD, is a board-certified orthopedic-trained hand surgeon specializing in orthopedic hand surgery. He completed his medical education at Creighton University School of Medicine and his residency at the University of Nebraska. Dr. Miller pursued a Hand & Upper Extremity Fellowship at Loma Linda University for additional microvascular and reconstructive training. His interests include complex hand, wrist, and elbow deformities and trauma, nerve and tendon repair, arthroscopy, and wide-awake surgery with local anesthesia. He emphasizes shared decision-making in treatment plans, prioritizing surgeries supported by medical literature, and utilizing innovative techniques like Wide-awake Local Anesthesia No Tourniquet (WALANT) whenever possible.

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Samir Nayyar, MD

Dr. Nayyar, MD, is a board-certified and fellowship-trained orthopedic surgeon specializing in joint reconstruction and replacement. He received his medical education at the University of Buffalo, where he received awards for excellence. Dr. Nayyar honed his skills at NYU Langone Medical Center/Hospital for Joint Disease, learning from prestigious orthopedic surgeons. He prioritizes innovative techniques to minimize postoperative pain and blood loss, focusing on restoring function and mobility for his patients.

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