This is not a Defense Health Agency, Great Lakes mandate. All Army National Guard/U.S. Army Reserve requests are required by the National Guard Bureau and Office of the Chief of Army Reserve to be submitted via the Electronic Medical Processing System (eMMPS/MEDCHART). Defense Health Agency, Great Lakes will not accept Army Reserve Component eligibility packages submitted by mail, fax, or email. ** If you are a Unit Administrator seeking more information about MEDCHART access or instructions, please contact your chain of command.