Standard&Poor's Ratings Services has assigned its 'AA-' long-term rating and stable outlook to $168.7 million series 2012C revenue bonds issued by Maryland Health&Higher Educational Facilities Authority for Johns Hopkins Health System (JHHS). We also affirmed our 'AA-' long-term ratings and underlying ratings (SPURs) on various issuers' debt issued for JHHS, the 'A+' rating on JHHS' series 2003A lease revenue bonds, and the 'A' rating on Sibley Memorial Hospital. Sibley is not part of JHHS' obligated group but is a wholly owned subsidiary of JHHS and its rating is closely tied to the ratings on JHHS. The outlook is positive for Sibley, and stable for the other ratings. We also affirmed our 'AAA/A-1' ratings on the series