Of course, this mostly pertains to those patients who have the most complex conditions and who require constant monitoring, such as diabetics, those with chronic heart failure, cancer, and innumerable other chronic long-term maladies.
There's not much involvement—or need for involvement—from a medical home perspective for a healthy 22-year-old, for example. The medical home patients that benefit most, and who can benefit most from a cost perspective, are those whose treatment is the complicated and expensive.
Of course, that's one reason the medical home philosophy and regulations were developed, because these patients were too often receiving suboptimal care and or unnecessary care, which increases both suffering and costs. That's a lose/lose proposition if I ever saw one.