Organization and Basis of Presentation Organization and Operations Molina Healthcare, Inc. provides managed healthcare services under the Medicaid and Medicare programs and through the state insurance marketplaces (the Marketplace). We currently have two reportable segments: our Health Plans segment and our Other segment. We manage the vast majority of our operations through our Health Plans segment. The Other segment includes the historical results of the Medicaid management information systems (MMIS) and behavioral health subsidiaries we sold in the fourth quarter of 2018, as well as certain corporate amounts not allocated to the Health Plans segment. Prior to the fourth quarter of 2018, the MMIS subsidiary was reported as a stand-alone segment. The Health Plans segment consists of health plans operating in 14 states and the Commonwealth of Puerto Rico. As of June 30, 2019 , these health plans served approximately 3.4 million members eligible for Medicaid, Medicare, and other government-sponsored healthcare programs for low-income families and individuals including Marketplace members, most of whom receive government subsidies for premiums. The health plans are generally operated by our respective wholly owned subsidiaries in those states, each of which is licensed as a health maintenance organization (HMO). Our health plans state Medicaid contracts generally have terms of three to five years. These contracts typically contain renewal options exercisable by the state Medicaid agency, and allow either the state or the health plan to terminate the contract with or without cause. Such contracts are subject to risk of loss in states that issue requests for proposal (RFPs) open to competitive bidding by other health plans. If one of our health plans is not a successful responsive bidder to a state RFP, its contract may not be renewed. In addition to contract renewal, our state Medicaid contracts may be periodically amended to include or exclude certain health benefits (such as pharmacy services, behavioral health services, or long-term care services); populations such as the aged, blind or disabled; and regions or service areas. Consolidation and Interim Financial Information The consolidated financial statements include the accounts of Molina Healthcare, Inc., and its subsidiaries. In the opinion of management, all adjustments considered necessary for a fair presentation of the results as of the date and for the interim periods presented have been included; such adjustments consist of normal recurring adjustments. All significant intercompany balances and transactions have been eliminated. The consolidated results of operations for the six months ended June 30, 2019 , are not necessarily indicative of the results for the entire year ending December 31, 2019 . The unaudited consolidated interim financial statements have been prepared under the assumption that users of the interim financial data have either read or have access to our audited consolidated financial statements for the fiscal year ended December 31, 2018 . Accordingly, certain disclosures that would substantially duplicate the disclosures contained in our December 31, 2018 , audited consolidated financial statements have been omitted. These unaudited consolidated interim financial statements should be read in conjunction with our audited consolidated financial statements for the fiscal year ended December 31, 2018 . Use of Estimates The preparation of consolidated financial statements in conformity with generally accepted accounting principles (GAAP) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities. Estimates also affect the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Principal areas requiring the use of estimates include:  The determination of medical claims and benefits payable of our Health Plans segment;  Health plans contractual provisions that may limit revenue recognition based upon the costs incurred or the profits realized under a specific contract;  Health plans quality incentives that allow us to recognize incremental revenue if certain quality standards are met;  Settlements under risk or savings sharing programs;  The assessment of long-lived and intangible assets, and goodwill for impairment;  The determination of reserves for potential absorption of claims unpaid by insolvent providers;  The determination of reserves for litigation outcomes;  The determination of valuation allowances for deferred tax assets; and  The determination of unrecognized tax benefits.