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Medical Costs Payable (Notes)
 3 Months Ended
Mar. 31, 2024
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)20242023
Medical costs payable, beginning of period$32,395 $29,056 
Acquisitions (dispositions), net(687)1 
Reported medical costs:
Current year66,045 60,315 
Prior years(310)(470)
Total reported medical costs65,735 59,845 
Medical payments:
Payments for current year
(38,652)(35,087)
Payments for prior years(24,759)(22,006)
Total medical payments(63,411)(57,093)
Medical costs payable, end of period$34,032 $31,809 
For the three months ended March 31, 2024 and 2023, prior years’ medical cost reserve development included no individual factors that were significant. Medical costs payable included reserves for claims incurred by consumers but not yet reported to the Company of $25.3 billion and $22.3 billion at March 31, 2024 and December 31, 2023, respectively.