62% of the hospitals are non-profit,
In 2003, of the roughly 3,900 nonfederal, short-term, acute care general hospitals in the United States, the majority—about 62 percent—were nonprofit. The rest included government hospitals (20 percent) and for-profit hospitals (18 percent).
There are presently 141 accredited MD-granting institutions - http://en.wikipedia.org/wiki/List_of_university_hospitals http://en.wikipedia.org/wiki/List_of_medical_schools_in_the_United_States Spending comes from programs such as Medicare, Medicaid, TRICARE, the Children's Health Insurance Program, and the Veterans Health Administration.
Together, such issues place the U.S. at the bottom of the list for life expectancy. On average, a U.S. male can be expected to live almost four fewer years than those in the top-ranked country
In the United States, ownership of the health care system is mainly in private hands, though federal, state, county, and city governments also own certain facilities.
The non-profit hospitals share of total hospital capacity has remained relatively stable (about 70%) for decades.[31] There are also privately owned for-profit hospitals as well as government hospitals in some locations, mainly owned by county and city governments. In 1946 the Hill-Burton Act was passed, which provided federal funding for hospitals in exchange for treating poor patients.[32]
There is no nationwide system of government-owned medical facilities open to the general public but there are local government-owned medical facilities open to the general public. The federal Department of Defense operates field hospitals as well as permanent hospitals (the Military Health System), to provide military-funded care to active military personnel.

More than 900 hospitals are listed in Cancer treating at least 251 inpatients in in 2009, 2010, 2011. http://health.usnews.com/best-hospitals/rankings/cancer
Nearly 1,510 hospitals are listed in Urology Cancer treating at least 77 inpatients in in 2009, 2010, 2011. http://health.usnews.com/best-hospitals/rankings/urology

Hospitals hire reps to sell doctors on patient referrals - http://usatoday30.usatoday.com/money/industries/health/story/2011-12-13/hospitals-sales-reps/51887938/1
American Medical Resources Foundation
"Since its founding in 1988, AMRF has donated over 110 million dollars of medical equipment to hospitals and clinics in developing nations. AMRF requests and receives donations of used medical equipment from hospitals, clinics, and manufacturers throughout the United States." Phone: 508-580-3301. Fax: 508-580-3306.
International Medical Volunteers Association (IMVA)
"...is a nonprofit organization that promotes, facilitates, and supports voluntary medical activity through education and information exchange. IMVA assists volunteer-seeking organizations, principally non-governmental organizations (NGO's), in locating volunteers to work in their programs and by providing a forum for project cooperation, information, equipment and supply exchange." P.O. Box 205, Woodville, Massachusetts 01784.