Best Anesthesiologist Rancho Cucamonga Near Me

4worldlovers:
Pain Management Specialist & Anesthesiologist located in Beverly Hills, CA & Rancho Cucamonga, CA

At Westside Pain Specialists, located in Beverly Hills and Rancho Cucamonga, California, Dr. James Nassiri uses his rich background in treating patients with a wide variety of acute chronic pain conditions. Patients from throughout the Los Angeles area benefit from his expertise in treating arthritis, back, neck, knee, and shoulder pain, and sciatica with platelet rich plasma injections and other innovative pain management techniques.

Dr. Nassiri’s educational path began in his hometown at the University of Southern California, where he graduated with Honors, earning a degree in Exercise Science. From there, his journey took him to the East Coast, where he achieved a Master’s Degree and Medical Doctorate from the Boston University School of Medicine. Dr. Nassiri then returned to his beloved Los Angeles, expanding his medical knowledge with an internship in general surgery, with residency training in Anesthesiology, and is now double-board certified in Anesthesiology and Pain Medicine. He is a diplomat of the American Board of Anesthesiology and the American Board of Pain Medicine.

4worldlovers:
Skip the phones! Existing patients can reach us through the patient portal. Click here to request an account


Synovation was awarded a three year grant by the state of California to work on improving care to chronic pain patients using our multidisciplinary approach. We will be partnering with Community Health Group in San Diego County and will be collecting both clinical and utilization outcomes data.


Synovation leverages a multidisciplinary approach, using various types of therapies and techniques to address your pain. Our providers collaborate to determine the best treatment for you, and our programs focus on gaining control back in your life.


Meet some of our patients, and learn how they’ve changed their lives.


“The FRP included PT, exercise, great group camaraderie, and health education about fitness and nutrition. I’m at my high school weight, and in perhaps the best health I’ve ever been in!”

“The meditation and program elements help you find control, so other factors don’t stress you and you think about YOU. That wasn’t what I was doing with my life. Now I do!”

4worldlovers: We value your visit with us. You will be greeted by our friendly and caring staff. During your initial consultation with Dr. Martinez you can expect the physician to complete an evaluation of your pain and to provide individualized counseling and treatment. We value your healthcare resources. We maintain a full procedure suite in our…

Our commitment is to provide the most compassionate care for patients suffering from chronic pain. We aim to deliver successful outcomes, advanced treatment options, and the best patient experience. Your care begins with a consultation by Carlos T. J. Martinez, DO. Dr. Martinez is a leading pain management physician in the area, treating many chronic…