MinuteClinic provides a health care service by employing nurse practitioners in a pharmacy-based medical kiosk to offer medical treatment for minor health problems without any prior appointments and within about half an hour. The nurse practitioner is able to diagnose a limited number of common non-severe medical conditions applying rule-based diagnostics. With this, e.g. health screenings, monitoring medical conditions, and vaccinations are available at a much lower cost than in a regular hospital. It has approximately 2,200 nurse practitioners and is open seven days a week.