This twelve-month fellowship with intensive training in evaluation and treatment of pain, instruction in the technique of somatic and sympathetic blocks, intra-spinal catheters and pumps, neurolytic blocks, cryoanalgesia, and spinal cord stimulation. Fellows spend time on both the Chronic Pain Service and Acute Pain Service, with ample time allotted for didactic sessions and multidisciplinary meetings at BIDMC and other Harvard teaching hospitals. Successful completion leads to certification eligibility by the American Board of Anesthesiology.