At every stage, Mr. Keating, a 26-year-old doctoral st...

At every stage, Mr. Keating, a 26-year-old doctoral student at the Massachusetts Institute of Technology’s Media Lab, has pushed and prodded to get his medical information, collecting an estimated 70 gigabytes of his own patient data by now. His case points to what medical experts say could be gained if patients have had full and easier access to their medical information. Better-informed patients, they say, are more likely to take better care of themselves.