4. Accounts Receivable and Net Revenue:

Accounts receivable, net consists of the following (in thousands):


	December 31,
	2014			2013
Gross accounts receivable	$	1,200,958		$	997,682
Allowance for contractual adjustments and uncollectibles		(848,767	)		(712,285)

	$	352,191		$	285,397

Net revenue consists of the following (in thousands):


	Years Ended December 31,
	2014			2013			2012
Gross revenue	$	7,662,556		$	6,702,484		$	5,691,790
Contractual adjustments and uncollectibles		(5,403,437	)		(4,695,232	)		(3,994,924	)
Hospital contract administrative fees		179,794			146,760			119,746

	$	2,438,913		$	2,154,012		$	1,816,612

Accounts receivable of $352.2 million and $285.4 million at December 31, 2014 and 2013, respectively, consist primarily of amounts due from government-sponsored healthcare programs and third-party insurance payors for services provided by the Company’s affiliated physicians.

Net revenue of $2.4 billion, $2.2 billion and $1.8 billion for the years ended December 31, 2014, 2013 and 2012, respectively, consists primarily of gross billed charges for services provided by the Company’s affiliated physicians less an estimated allowance for contractual adjustments and uncollectibles to properly account for the anticipated differences between gross billed charge amounts and expected reimbursement amounts.

The Company’s contractual adjustments and uncollectibles as a percentage of gross patient service revenue vary slightly each year depending on several factors, including improved managed care contracting, changes in reimbursement from state Medicaid programs and other government-sponsored programs, shifts in the percentage of patient services being reimbursed under government-sponsored programs and annual price increases.

The Company’s annual price increases typically increase contractual adjustments as a percentage of gross patient service revenue. This increase is primarily due to Medicaid and other government-sponsored health care programs that generally provide for reimbursements on a fee-schedule basis rather than on a gross charge basis. When the Company bills these programs, like other payors, on a gross-charge basis, it also increases its provision for contractual adjustments and uncollectibles by the amount of any price increase, resulting in a higher contractual adjustment percentage.