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Medical Costs Payable (Notes)
3 Months Ended
Mar. 31, 2023
Insurance [Abstract]  
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)20232022
Medical costs payable, beginning of period$29,056 $24,483 
Acquisitions
Reported medical costs:
Current year60,315 52,813 
Prior years(470)(290)
Total reported medical costs59,845 52,523 
Medical payments:
Payments for current year
(35,087)(29,589)
Payments for prior years(22,006)(18,749)
Total medical payments(57,093)(48,338)
Medical costs payable, end of period$31,809 $28,676 
For the three months ended March 31, 2023 and 2022, prior years’ medical cost reserve development included no individual factors that were significant. Medical costs payable included reserves for claims incurred by insured customers but not yet reported to the Company of $21.7 billion and $20.0 billion at March 31, 2023 and December 31, 2022, respectively.