This site is a great reference for the current and past Healthcare ICD 10 codes. The International Statistical Classification of Diseases and Related Health Problems 10th Revision are used to classify diseases and medical problems. These standard codes play a key role in tracking demographics and analytics in healthcare
Ginger.io is developing a mobile app for the Mood Matters Project that will help doctors better understand people who are suffering from depression. If eligible to take part in the Mood Matters Project, the participant will answer surveys everyday in his/her smartphone that will be sent through Ginger io's mobile app. I think this is a very interesting way to gain a bit more understanding of the behavioral patterns of depressed people in a non-clinical setting.