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Medical Claims Liability
3 Months Ended
Mar. 31, 2026
Insurance [Abstract]  
Medical Claims Liability Medical Claims Liability
The following table summarizes the change in medical claims liability for the three months ended March 31, 2026 ($ in millions):
 MedicaidMedicareCommercialOtherConsolidated Total
Balance, January 1, 2026
$10,375 $4,401 $5,683 $85 $20,544 
Less: Reinsurance recoverable16 — 60 — 76 
Balance, January 1, 2026, net
10,359 4,401 5,623 85 20,468 
Incurred related to:
Current year22,608 9,013 7,490 386 39,497 
Prior years(653)(241)(292)(8)(1,194)
Total incurred21,955 8,772 7,198 378 38,303 
Paid related to:
Current year14,092 6,397 4,521 358 25,368 
Prior years6,820 2,710 3,252 76 12,858 
Total paid20,912 9,107 7,773 434 38,226 
Balance, March 31, 2026, net
11,402 4,066 5,048 29 20,545 
Plus: Reinsurance recoverable14 68 82 
Balance, March 31, 2026
$11,416 $4,066 $5,116 $29 $20,627 

The following table summarizes the change in medical claims liability for the three months ended March 31, 2025 ($ in millions):
 MedicaidMedicareCommercialOtherConsolidated Total
Balance, January 1, 2025
$10,299 $3,358 $4,463 $188 $18,308 
Less: Reinsurance recoverable18 — 47 — 65 
Balance, January 1, 2025, net
10,281 3,358 4,416 188 18,243 
Incurred related to:
Current year21,419 7,553 7,972 514 37,458 
Prior years(576)(176)(365)(16)(1,133)
Total incurred20,843 7,377 7,607 498 36,325 
Paid related to:
Current year12,996 5,243 4,731 359 23,329 
Prior years6,849 1,923 2,648 150 11,570 
Total paid19,845 7,166 7,379 509 34,899 
Plus: Premium deficiency reserve— 178 — — 178 
Balance, March 31, 2025, net
11,279 3,747 4,644 177 19,847 
Plus: Reinsurance recoverable18 — 46 — 64 
Balance, March 31, 2025
$11,297 $3,747 $4,690 $177 $19,911 

Reinsurance recoverables related to medical claims are included in premium and trade receivables. Changes in estimates of incurred claims for prior years are primarily attributable to reserving under moderately adverse conditions. Additionally, as a result of development within "Incurred related to: Prior years," the Company recorded $21 million and $34 million as a reduction to premium revenue in the three months ended March 31, 2026 and 2025, respectively, for minimum medical loss ratio (MLR) and other return of premium programs.
Incurred but not reported (IBNR) plus expected development on reported claims as of March 31, 2026 was $13,510 million. Total IBNR plus expected development on reported claims represents estimates for claims incurred but not reported, development on reported claims and estimates for the costs necessary to process unpaid claims at the end of each period. The Company estimates its liability using actuarial methods that are commonly used by health insurance actuaries and meet Actuarial Standards of Practice. These actuarial methods consider factors such as historical data for payment patterns, cost trends, product mix, seasonality, utilization of healthcare services and other relevant factors.

The Company reviews actual and anticipated experience compared to the assumptions used to establish medical costs. The Company establishes premium deficiency reserves if actual and anticipated experience indicates that existing policy liabilities together with the present value of future gross premiums will not be sufficient to cover the present value of future benefits, settlement and maintenance costs. For purposes of determining premium deficiencies, contracts are grouped in a manner consistent with the method of acquiring, servicing and measuring the profitability of such contracts and expected investment income is excluded. In December 2024, the Company recorded a premium deficiency reserve of $92 million related to the 2025 Medicare Advantage contract year, which was increased to $270 million in the first quarter of 2025 based on the progression of earnings during the year (with higher earnings at the beginning of the year and lower at the end of the year, given cost sharing progression), including anticipated impacts of the Inflation Reduction Act to the Part D benefit within the Company's Medicare Advantage business. As of March 2026, the Company did not record a premium deficiency reserve related to the 2026 Medicare Advantage contract year.