Dr. Lloyd M. Alderson is a neurologist in Portsmouth, New Hampshire and is affiliated with multiple hospitals in the area, including Portsmouth Regional Hospital and Beverly Hospital-Massachusetts. He received his medical degree from UMass Chan Medical School and has been in practice for more than 20 years. Dr. Lloyd M. Alderson has expertise in treating dementia, Parkinson's disease, multiple sclerosis, among other conditions - see all areas of expertise. Dr. Lloyd M. Alderson accepts Medicare, Humana, Cigna, Blue Cross - see other insurance plans accepted. Dr. Lloyd M. Alderson is highly recommended by patients.