In a world where chronic pain silently affects millions, Dr. James Nassiri stands out not just for his medical expertise, but for his unwavering commitment to listening. As a double board certified physician in Anesthesiology and Pain Medicine, Dr. Nassiri leads Westside Pain Specialists, with locations in Beverly Hills and Rancho Cucamonga, offering a powerful blend of advanced pain treatments and personalized care.
Dr. Nassiri’s academic foundation began in Los Angeles, where he earned his undergraduate degree in Exercise Science from the University of Southern California, graduating with honors. He then attended the Boston University Chobanian and Avedisian School of Medicine, earning his Doctor of Medicine in 2001. He continued his training with a residency in Physical Medicine and Rehabilitation at Harbor UCLA Medical Center, a critical chapter that shaped his understanding of comprehensive, movement focused healing. Today, with 24 years of experience, Dr. Nassiri is recognized across California for his expertise in treating a broad range of acute and chronic pain conditions with precision, compassion, and innovative approaches.
As a Physical Medicine and Rehabilitation physician, Dr. Nassiri brings unique depth to the treatment of conditions such as cervical radiculopathy, nerve root injuries, plexus disorders, sciatica, joint pain, arthritis, and more. His practice offers both cutting edge and regenerative treatments, including platelet rich plasma injections, a go to solution for athletes and patients seeking non surgical healing. Dr. Nassiri currently practices at Westside Pain Specialists and is affiliated with Glendale Memorial Hospital and Health Center, offering patients access to premier healthcare environments backed by his own clinical leadership.
Fluent in Persian and Spanish, Dr. Nassiri serves a diverse and international patient base. His ability to communicate across cultures adds a rare dimension of trust and comfort, especially for patients navigating complex, long term pain management. He is also a Senior Consultant at HealthHelp and the Medical Director of the Pain and Musculoskeletal Program, where his expertise guides care models on a national scale. In addition, his insights are regularly sought in the legal field, where he supports attorneys with expert medical analysis on complex injury cases.
While Dr. Nassiri’s credentials are vast, what sets him apart most is his belief that healing starts by listening. Every patient’s experience is unique, and his individualized care plans reflect this, designed to target the source of pain, restore function, and empower patients to regain their quality of life.
With convenient offices in Beverly Hills and Rancho Cucamonga, Westside Pain Specialists has become a trusted destination for patients throughout Southern California seeking top tier pain management. Whether it is a working professional with a spinal issue or a retired athlete with joint damage, patients turn to Dr. Nassiri for results driven care delivered with integrity.
Dr. James Nassiri’s commitment to combining science with empathy has transformed countless lives and continues to redefine what pain relief can look like in the 21st century. With a focus on innovation, patient centered care, and cross disciplinary collaboration, he stands at the forefront of pain medicine in California.
