Some of the most advanced medical centers are starting to make medical information more available to patients. Brigham and Women's, where Mr. Keating had his surgery, is part of the Partners HealthCare Group, which now has 500,000 patients with web access to some of the information in their health records including conditions, medications and test results. Other medical groups are beginning to allow patients online access to the notes taken by physicians about them, in an initiative called OpenNotes. In a yearlong evaluation project at medical groups in three states, more than two-thirds of the patients reported having a better understanding of their health and medical conditions, adopting healthier habits and taking their medications as prescribed more regularly.