The Catholic Health hospital system ranked 30th among the nation's 100 most-integrated health care networks, according to an annual listing published by SDI, a health care data and consulting company.
Catholic Health has continued to improve its ranking over the last four years, moving up from 51st place in 2010. It has climbed 66 spots in the ranking since 2008.
Kaleida Health ranked 87th for 2011 and 79th in 2010.
The survey identifies the top 100 integrated hospital systems among 576 nonspecialty, local and regional networks that meet certain criteria.
"Our consistent improvement over the last four years is another indicator that we continue to progress as a high-performing health system," Joseph D. McDonald, president and chief executive officer of Catholic Health, said in a statement.
"We have a focused team at Catholic Health and a solid partnership with our physicians, dedicated to putting better care systems in place to benefit our patients," he said.
SDI evaluates a hospital system's ability to operate as a unified network, looking at such areas of hospital operations as integrated technology, contractual capabilities, outpatient utilization, financial stability and physicians.
Sentara Healthcare in Norfolk, Va., finished first for the second year in a row.
Catholic Health consists of Mercy, Kenmore Mercy, Sisters and Sisters-St. Joseph Campus hospitals. Kaleida Health includes Buffalo General, Women & Children's, DeGraff Memorial, Millard Fillmore and Millard Fillmore Suburban hospitals.