Standard&Poor's Ratings Services raised to 'AA-' from 'A' its rating on the District of Columbia's series 2009 revenue bonds issued for Sibley Memorial Hospital. At the same time, we assigned a 'AA-' long-term rating and stable outlook to Maryland Health&Higher Educational Facilities Authority's $243.1 million series 2013C revenue bonds, issued for Johns Hopkins Health System Obligated Group (JHHS). We also affirmed our 'AA-' long-term ratings on the authority's other debt issued for JHHS, and the 'AA-' rating on the authority's $24.5 million revenue bonds series 2005A, issued for JHMI Utilities LLC, which is guaranteed by JHHS. The outlook on all ratings is stable. The upgrade is due to Sibley joining the JHHS obligated group effective with
