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Medical Claims and Benefits Payable | 6 Months Ended
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Jun. 30, 2017
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 (including amounts payable for the provision of long-term services and supports, or LTSS) as of the dates indicated.
| June 30, 2017 |  | December 31, 2016
| (In millions)
Fee-for-service claims incurred but not paid (IBNP) | $ | 1,478 |  |  | $ | 1,352 |
Pharmacy payable | 121 |  |  | 112 |
Capitation payable | 45 |  |  | 37 |
Other | 433 |  |  | 428 |
| $ | 2,077 |  |  | $ | 1,929 |
“Other” medical claims and benefits payable include 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 operations. Non-risk provider payables amounted to $111 million and $225 million as of June 30, 2017 and December 31, 2016, respectively. Reinsurance recoverables of $65 million and $83 million as of June 30, 2017 and 2016, respectively, are included in “Receivables” in the accompanying consolidated balance sheets. 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 amount 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.
| Six Months Ended June 30,
| 2017 |  | 2016
| (Dollars in millions)
Medical claims and benefits payable, beginning balance | $ | 1,929 |  |  | $ | 1,685 |
Components of medical care costs related to: |  |  |
Current period | 8,633 |  |  | 7,371 |
Prior periods | (31 | ) |  | (189 | )
Total medical care costs | 8,602 |  |  | 7,182 |
Change in non-risk provider payables | (114 | ) |  | 24 |
Payments for medical care costs related to: |  |  |
Current period | 6,883 |  |  | 5,885 |
Prior periods | 1,457 |  |  | 1,240 |
Total paid | 8,340 |  |  | 7,125 |
Medical claims and benefits payable, ending balance | $ | 2,077 |  |  | $ | 1,766 |
Benefit from prior period as a percentage of: |  |  |
Balance at beginning of period | 1.6 | % |  | 11.3 | %
Premium revenue, trailing twelve months | 0.2 | % |  | 1.3 | %
Medical care costs, trailing twelve months | 0.2 | % |  | 1.4 | %
Assuming that our initial estimate of IBNP is accurate, we believe that amounts ultimately paid would generally be between 8% and 10% less than the IBNP liability recorded at the end of the period as a result of the inclusion in that liability of the provision for adverse claims deviation and the accrued cost of settling those claims. Because the amount of our initial liability is merely an estimate (and therefore not perfectly accurate), we will always experience variability in that estimate as new information becomes available with the passage of time. Therefore, there can be no assurance that amounts ultimately paid out will fall within the range of 8% to 10% lower than the liability that was initially recorded. Furthermore, because our initial estimate of IBNP is derived from many factors, some of which are qualitative in nature rather than quantitative, we are seldom able to assign specific values to the reasons for a change in estimate—we only know when the circumstances for any one or more factors are out of the ordinary. As indicated in the table above, the amounts ultimately paid out on our medical claims and benefits payable liabilities in fiscal years 2017 and 2016 were less than what we had expected when we had established those liabilities. The differences between our original estimates and the amounts ultimately paid out (or now expected to be ultimately paid out) for the most part related to IBNP. While many related factors working in conjunction with one another serve to determine the accuracy of our estimates, we are seldom able to quantify the impact that any single factor has on a change in estimate. In addition, given the variability inherent in the reserving process, we will only be able to identify specific factors if they represent a significant departure from expectations. As a result, we do not expect to be able to fully quantify the impact of individual factors on changes in estimates. While prior period development of our estimate as of December 31, 2016, through June 30, 2017, was favorable by $31 million, that amount is substantially less than the favorable prior period development of $189 million we recognized for the same period in the prior year. Further, favorable development through June 30, 2017, was less than the 8% to 10% we typically expect. We believe that the most significant uncertainties surrounding our IBNP estimates at June 30, 2017 are as follows:
• | In the first half of 2017, our Marketplace enrollment across all health plans increased by over 400,000 members. Due to limited insight into the cost patterns associated with this large number of new Marketplace members, our liability estimates for these members are subject to more than the usual amount of uncertainty.
• | At our Florida health plan, claims receipts increased significantly over the last few months due to an increase in the receipt of secondary claims, many of which are not our liability. These claims will either be denied or will have very small paid amounts. For this reason, claims denial rates, amounts paid per claim and other claims indicators will be impacted, making our liability estimates subject to more than the usual amount of uncertainty.
• | At our Illinois health plan, we paid a large number of claims in the first half of 2017 that had previously been denied and were subsequently disputed by providers. This has created some distortion in the claims payment patterns, making our liability estimates subject to more than the usual amount of uncertainty.
• | At our California health plan, we adjusted our inpatient authorization process. As a result, due to the expected increase in authorized inpatient stays, our liability estimates are subject to more than the usual amount of uncertainty.
• | At our New Mexico health plan, a fee schedule reduction for a large provider has created some distortion in the claims payment patterns, making our liability estimates subject to more than the usual amount of uncertainty.

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