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Medical Claims and Benefits Payable | 3 Months Ended
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Mar. 31, 2019
Other Liabilities Disclosure [Abstract] |
Medical Claims and Benefits Payable | Medical Claims and Benefits Payable The following table provides the details of our medical claims and benefits payable as of the dates indicated.
| March 31, 2019 |  | December 31, 2018
| (In millions)
Fee-for-service claims incurred but not paid (“IBNP”) | $ | 1,411 |  |  | $ | 1,562 |
Pharmacy payable | 114 |  |  | 115 |
Capitation payable | 59 |  |  | 52 |
Other | 411 |  |  | 232 |
| $ | 1,995 |  |  | $ | 1,961 |
“Other” medical claims and benefits payable includes amounts payable to certain providers for which we act as an intermediary on behalf of various government agencies without assuming financial risk. Such receipts and payments do not impact our consolidated statements of income. Non-risk provider payables amounted to $278 million and $107 million as of March 31, 2019 and December 31, 2018, respectively. The following table presents the components of the change in our medical claims and benefits payable for the periods indicated. The amounts presented for “Components of medical care costs related to: Prior periods” represent the amounts by which our original estimate of medical claims and benefits payable at the beginning of the period were more than the actual amount of the liability based on information (principally the payment of claims) developed since that liability was first reported.
| Three Months Ended March 31,
| 2019 |  | 2018
| (In millions)
Medical claims and benefits payable, beginning balance | $ | 1,961 |  |  | $ | 2,192 |
Components of medical care costs related to: |  |  |
Current period | 3,560 |  |  | 4,033 |
Prior periods (1) | (189 | ) |  | (311 | )
Total medical care costs | 3,371 |  |  | 3,722 |
Change in non-risk provider payables | 171 |  |  | 45 |
Payments for medical care costs related to: |  |  |
Current period | 2,197 |  |  | 2,498 |
Prior periods | 1,311 |  |  | 1,438 |
Total paid | 3,508 |  |  | 3,936 |
Medical claims and benefits payable, ending balance | $ | 1,995 |  |  | $ | 2,023 |
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(1) | March 31, 2018, includes the 2018 benefit of the 2017 Marketplace CSR reimbursement of $70 million.
Our estimates of medical claims and benefits payable recorded at December 31, 2018, and 2017 developed favorably by approximately $189 million and $311 million as of March 31, 2019, and 2018, respectively. The favorable prior year development recognized in the first quarter of 2019, was primarily due to lower than expected utilization of medical services by our Medicaid and Marketplace members and improved operating performance. Consequently, the ultimate costs recognized in 2019, as claims payment were processed, was lower than our original estimates in 2018.

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