DEERS is the Defense Enrollment Eligibility Reporting System: a database of information on uniformed services members, U.S.-sponsored foreign military, DoD and uniformed services civilians, other personnel as directed by the DoD, and their family members.
If you have a U.S. military I.D. card and have Stuttgart installation access, you are registered in DEERS.
If you are not registered in DEERS, you will need to do so before you can be enrolled at U.S. Army Health Clinic Stuttgart. Please contact an ID card office for instructions.