Useful for identifying the orginality of your ideas, the appropriate institute to fund your grant, the best study section to review it, and the most appropriate funding mechanism. There are no deadlines and no funding is defined for this purpose. NIH staff members located in the institutes and centers and responsible for overseeing and monitoring a scientific program and progress of grants in his or her portfolio. This is the person to contact at an agency or organization to ask questions about a funding opportunity. Names and contact information can be found from Institute Web sites, NIH Program Announcements, and NIH RFA's.
Many federal agencies are of interest to health professionals.
The Federal Register is the main daily publication of the U.S. Government and can be overwhelming. Then you won't get all presidential proclamations, all federal rule and regulation announcements, etc. Most of the books and databases do not list all possibilities so that many different sources must be used to do a thorough search. There are very few grants for individuals. Researchers at universities or other non-profit agencies, however are not applying as individuals.