Patient-Centered Care: Treating the patient and not just the pain. As a patient living with chronic, acute or severe pain, choosing the best doctor and treatment options are the most important decisions you will make. Your pain and well being depend on the right choice. Union Anesthesia Associates and Raritan Anesthesia Associates specializes in treating the patient’s pain source, and not just the symptoms. Our practice expertly performs and researches the latest in non-invasive and minimally invasive surgical techniques. Additionally, we have had tremendous success in non-surgical techniques that help alleviate or completely eliminate the patient’s pain condition.