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Medical Costs Payable (Notes)
6 Months Ended
Jun. 30, 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 six months ended June 30:
(in millions)20232022
Medical costs payable, beginning of period$29,056 $24,483 
Acquisitions171 
Reported medical costs:
Current year120,773 104,936 
Prior years(660)(320)
Total reported medical costs120,113 104,616 
Medical payments:
Payments for current year
(91,621)(78,937)
Payments for prior years(25,602)(21,355)
Total medical payments(117,223)(100,292)
Medical costs payable, end of period$31,947 $28,978 
For the six months ended June 30, 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 $22.0 billion and $20.0 billion at June 30, 2023 and December 31, 2022, respectively.