Schedule II - Valuation Accounts and Reserves

12 Months Ended

Dec. 31, 2019

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

SCHEDULE II - VALUATION ACCOUNTS AND RESERVES

QUEST DIAGNOSTICS INCORPORATED AND SUBSIDIARIES

SCHEDULE II - VALUATION ACCOUNTS AND RESERVES

(in millions)

	Balance at Beginning of Year		Provision for Doubtful Accounts		Net Deductions and Other			Balance at End of Year
Year Ended December 31, 2019
Doubtful accounts and allowances	$	15	$	11	$	11	(a)	$	15
Year Ended December 31, 2018
Doubtful accounts and allowances	$	13	$	6	$	4	(a)	$	15
Year Ended December 31, 2017
Doubtful accounts and allowances	$	6	$	8	$	1	(a)	$	13

(a)

Primarily represents the write-off of accounts receivable, net of recoveries.