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Medical Costs Payable (Notes)

3 Months Ended

Mar. 31, 2021

Short-Duration Insurance and Deposit Contracts

Medical Costs Payable

The following table shows the components of the change in medical costs payable for the three months ended March 31:


(in millions)	2021		2020
Medical costs payable, beginning of period	$	21,872	$	21,690
Acquisitions	12		—
Reported medical costs:
Current year	45,914		41,580
Prior years	(1,010)		(580)
Total reported medical costs	44,904		41,000
Medical payments:
Payments for current year	(25,960)		(23,471)
Payments for prior years	(15,995)		(16,447)
Total medical payments	(41,955)		(39,918)
Medical costs payable, end of period	$	24,833	$	22,772

For the three months ended March 31, 2021 and March 31, 2020, prior years medical cost reserve development was primarily driven by lower than expected health system utilization. Medical costs payable included reserves for claims incurred by insured customers but not yet reported to the Company of $16.3 billion and $14.8 billion at March 31, 2021 and December 31, 2020, respectively.