priaid.com (under the subbrand ApiMedic.com) offers a medical symptom checker primarily for patients. Based on the entered symptoms it tells you what possible diseases you have. It directs you to more medical information and shows you the right doctor for further clarifications. The symptom checker can be integrated via the flexible API (Application Programming Interface). You can find here code examples (SDK) for a symptom checker.
In the following you can access the Standard License Agreement for the Symptom Checker API (ApiMedic.com), which includes the latest End User Terms and Privacy Policy for your application: Symptom Checker API License Agreement