Standard&Poor's Ratings Services has assigned its 'AA-' long-term rating to $99.98 million series 2012B revenue bonds issued by Maryland Health&Higher Educational Facilities Authority, for Johns Hopkins Health System Obligated Group (JHHS). We also affirmed our 'AA-' long-term ratings and underlying ratings (SPURs) on various issuer's debt issued for JHHS, 'A+' rating on JHHS's series 2003A lease revenue bonds, and 'A' rating and positive outlook on Sibley Memorial Hospital. Sibley is not part of JHHS's obligated group but is a wholly owned subsidiary of JHHS and its rating is closely tied to the ratings on JHHS. We also affirmed our 'AAA/A-1' ratings on the series 2008A bonds issued for the JHHS obligated group and the series 2008