Meet Our Physicians

The Center For Clinical Research Inc. (CCR) is a Site Management Organization company that was founded by Dr. Alex Reyzelman in 2003. It is headquartered in San Francisco and includes several locations throughout Northern California. The primary focus of the organization was initially wound care, but it has since expanded to include neurology, internal medicine, pain and cardiology.

CCR partners with pharmaceuticals, medical device companies and highly qualified investigators to conduct Clinical Trials from their genesis through successful completion. The Center is home to three greatly accomplished Clinical Research Coordinators who monitor and oversee all of the practices and procedures involved in every Clinical Trial.

Arnold Greenberg MD, Board Certified Neurologist
Dr. Arnold Greenberg has practiced Neurology in the California Bay Area for more than 15 years, and has been involved in Clinical Research for 5 years. He is well know and highly respected as a great authority in this field. During his time with CCR Dr. Greenberg has been involved in a great variety of medical studies, including peripheral neuropathy, post-herpetic neuralgia, and Migraines.

James Greenberg MD, Board Certified Internal Medicine
Dr. James Greenberg began practicing Internal Medicine in the California Bay Area over 15 years ago. He has been deeply involved in Clinical Research for 7 years and built a solid reputation for his high level of professionalism and expertise. Some of the many studies he has been associated with include Hypertension, Diabetes, Venous Leg Ulcers and Tinea Pedis.

Alex Reyzelman DPM, Board Certified in Podiatric Surgery
Dr. Alex Reyzleman is the President and Founder of CCR. His has been involved in conducting Clinical Trials for more than a decade as both an Investigator and an Administrator. The accomplishments of Dr. Reyzelman and his dedicated staff have been frequently praised since they began their efforts, and he has proven himself to be an invaluable member of the medical community.

Ravi Panjabi MD, Board Certified in Anesthesiology and Pain Management
Dr. Ravi Panjabi has worked in the field of Pain Management in the California Bay Area for 11 years. For the last 5 years he has also been deeply involved in Clinical Research, particularly in the study of painful peripheral neuropathy, post-herpetic neuralgia and lower back pain. He has been heralded for his achievements in these important and complex areas, and continues to be a valued asset to the medical and Clinical Research communities.

Arkady Massen MD, Family Medicine
Dr. Arkady Massen has practiced Family Medicine in the Bay Area for 15 years; 5 of which have involved Clinical Research work. During this time he has conducted a variety of important studies, including Hypertension, Post-Herpetic Neuralgia, Diabetic Peripheral Neuropathy, and Diabetes. His ongoing efforts, expertise and contributions to his field have caused him to be a well respected and highly sought after practitioner.

These experts are proud to work with skilled staff members who have been trained in a variety of professional areas including OSHA, IATA, CPR, BCLS, NIH and GCP. They continue to work diligently for the advancement of new and beneficial medications and procedures.