revenues at the estimated amounts we expect to collect. Our revenues from third-party payers and the uninsured for the quarters and nine months ended September 30, 2013 and 2012 are summarized in the following table (dollars in millions):


	Quarter
	2013			Ratio			2012			Ratio
Medicare	$	1,847			21.8	%	$	1,949			24.2	%
Managed Medicare		794			9.4			720			8.9
Medicaid		401			4.7			378			4.7
Managed Medicaid		386			4.6			380			4.7
Managed care and other insurers		4,636			54.8			4,422			54.8
International (managed care and other insurers)		287			3.4			253			3.1

		8,351			98.7			8,102			100.4
Uninsured		717			8.5			576			7.1
Other		343			4.1			215			2.7

Revenues before provision for doubtful accounts		9,411			111.3			8,893			110.2
Provision for doubtful accounts		(955	)		(11.3	)		(831	)		(10.2	)

Revenues	$	8,456			100.0	%	$	8,062			100.0	%


	Nine Months
	2013			Ratio			2012			Ratio
Medicare	$	5,961			23.5	%	$	6,251			25.4	%
Managed Medicare		2,441			9.6			2,199			8.9
Medicaid		1,098			4.3			1,188			4.8
Managed Medicaid		1,165			4.6			1,080			4.4
Managed care and other insurers		13,777			54.4			13,340			54.3
International (managed care and other insurers)		868			3.4			779			3.2

		25,310			99.8			24,837			101.0
Uninsured		1,809			7.1			1,757			7.1
Other		959			3.8			651			2.7

Revenues before provision for doubtful accounts		28,078			110.7			27,245			110.8
Provision for doubtful accounts		(2,732	)		(10.7	)		(2,666	)		(10.8	)

Revenues	$	25,346			100.0	%	$	24,579			100.0	%