Participants will be a part of this study for 4 years or until they are no longer followed at Massachusetts General Hospital. Participants will be assigned randomly to one of two arms. Participants assigned to Arm 1 will receive standard care, involving standard provider alerts which will be posted on the participant's health record. Participants assigned to Arm 2 will receive enhanced care, involving improved functionality. Experimental informatics-based provider alerts and support systems will be used to develop a pilot system designed to optimize delivery of HIV clinical care.