AzMedicine readers may recall recent artiles by Dr. Carroll describing his vision and experience with implementing a "cash-based" practice. His practice, called Renaissance Family Medical Care, offers "concierge care without the retainer." As of today, Dr. Carroll says he is very pleased with the way things are going. Between December and February his practice doubled its patient flow, primarily by word of mouth, and also has reduced overhead. The practice currently serves 3,700 patients, and about one-third of those patients are cash-only. Renaissance retains contracts with only about 12 fee-for-service insurers, which has led to faster reimbursements. The practice serves patients at both ends of the income spectrum.