COMMITMENTS AND CONTINGENCIES	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES The Company’s current and past business practices are subject to reviews or other investigations by various state insurance and healthcare regulatory authorities and other state and federal regulatory authorities. These reviews focus on numerous facets of the Company’s business, including claims payment practices, statutory capital requirements, provider contracting, risk adjustment, competitive practices, commission payments, privacy issues, fraud, waste and abuse laws, network adequacy, utilization management practices, pharmacy benefits, access to care, compliance with Health Insurance Marketplace or enhanced direct enrollment (“EDE”) agreements and sales practices, among others. Some of these reviews have historically resulted in fines imposed on the Company and some have required changes to certain of the Company’s practices. The Company continues to be subject to these reviews, which could result in additional fines or other sanctions being imposed on the Company or additional changes to certain of its practices. The Company is also currently involved in, and may in the future from time to time become involved in, legal proceedings and other claims in the ordinary course of its business, including class actions and suits brought by the Company’s members, providers, commercial counterparties, employees, and other parties relating to the Company’s business, including management and administration of health benefit plans and other services. Such matters can include claims relating to the performance of contractual and non-contractual obligations to providers, vendors, members, employer groups, and others, including, but not limited to, the alleged failure to properly pay in-network and out-of-network claims and challenges to the manner in which the Company processes claims, claims alleging that the Company has engaged in unfair business practices, claims that the Company has violated laws or regulations, disputes regarding the amounts owed under vendor contracts, various employment claims, disputes regarding reinsurance arrangements, disputes relating to intellectual property, privacy, the Telephone Consumer Protection Act and class action lawsuits, or other claims alleging that the Company has engaged in unfair business practices. The Company records liabilities for its reasonable estimates of probable losses resulting from these matters where appropriate. Estimates of losses resulting from legal and regulatory matters involving the Company are inherently difficult to predict, particularly where the matters: involve indeterminate claims for monetary damages or may involve fines, penalties or punitive damages; present novel legal theories or represent a shift in regulatory policy; involve a large number of claimants or regulatory bodies; are in the early stages of the proceedings; or could result in a change in business practices. Accordingly, the Company is often unable to estimate the losses or ranges of losses for those matters where there is a reasonable possibility or it is probable that a loss may be incurred, the ultimate settlement of which could be material. Given that such proceedings are subject to uncertainty, there can be no assurance that such legal proceedings, either individually or in the aggregate, will not have a material adverse effect on Oscar's business, results of operations, financial condition or cash flows. The ACA originally established a cost-sharing reduction (“CSR”) program to make health insurance more affordable for eligible individuals by requiring insurers to reduce out-of-pocket costs while receiving CSR subsidies from CMS. In 2017, the Trump Administration issued an executive order that immediately ceased payments of ACA CSR subsidies to issuers. On June 27, 2017, impacted issuers seeking compensation for the halted CSR subsidy payments commenced a class action lawsuit against the federal government in the Court of Federal Claims, captioned Common Ground Healthcare Cooperative v. United States, Case No. 17-877. In 2024, an agreement in principle was reached between class counsel on behalf of impacted issuers and the federal government to retroactively compensate the class. The settlement agreement was fully executed by the class and the federal government on August 11, 2025. On November 6, 2025, the Court of Federal Claims granted final settlement approval and ordered the distribution of 95% of the settlement funds, with the remaining 5% held until the attorneys’ fees award is determined. The estimated net recovery recorded as of December 31, 2025 was approximately $48 million, which was subsequently received in April 2026.

The Company’s current and past business practices are subject to reviews or other investigations by various state insurance and healthcare regulatory authorities and other state and federal regulatory authorities. These reviews focus on numerous facets of the Company’s business, including claims payment practices, statutory capital requirements, provider contracting, risk adjustment, competitive practices, commission payments, privacy issues, fraud, waste and abuse laws, network adequacy, utilization management practices, pharmacy benefits, access to care, compliance with Health Insurance Marketplace or enhanced direct enrollment (“EDE”) agreements and sales practices, among others. Some of these reviews have historically resulted in fines imposed on the Company and some have required changes to certain of the Company’s practices. The Company continues to be subject to these reviews, which could result in additional fines or other sanctions being imposed on the Company or additional changes to certain of its practices.

The Company is also currently involved in, and may in the future from time to time become involved in, legal proceedings and other claims in the ordinary course of its business, including class actions and suits brought by the Company’s members, providers, commercial counterparties, employees, and other parties relating to the Company’s business, including management and administration of health benefit plans and other services. Such matters can include claims relating to the performance of contractual and non-contractual obligations to providers, vendors, members, employer groups, and others, including, but not limited to, the alleged failure to properly pay in-network and out-of-network claims and challenges to the manner in which the Company processes claims, claims alleging that the Company has engaged in unfair business practices, claims that the Company has violated laws or regulations, disputes regarding the amounts owed under vendor contracts, various employment claims, disputes regarding reinsurance arrangements, disputes relating to intellectual property, privacy, the Telephone Consumer Protection Act and class action lawsuits, or other claims alleging that the Company has engaged in unfair business practices.

The Company records liabilities for its reasonable estimates of probable losses resulting from these matters where appropriate. Estimates of losses resulting from legal and regulatory matters involving the Company are inherently difficult to predict, particularly where the matters: involve indeterminate claims for monetary damages or may involve fines, penalties or punitive damages; present novel legal theories or represent a shift in regulatory policy; involve a large number of claimants or regulatory bodies; are in the early stages of the proceedings; or could result in a change in business practices. Accordingly, the Company is often unable to estimate the losses or ranges of losses for those matters where there is a reasonable possibility or it is probable that a loss may be incurred, the ultimate settlement of which could be material.

Given that such proceedings are subject to uncertainty, there can be no assurance that such legal proceedings, either individually or in the aggregate, will not have a material adverse effect on Oscar's business, results of operations, financial condition or cash flows.

The ACA originally established a cost-sharing reduction (“CSR”) program to make health insurance more affordable for eligible individuals by requiring insurers to reduce out-of-pocket costs while receiving CSR subsidies from CMS. In 2017, the Trump Administration issued an executive order that immediately ceased payments of ACA CSR subsidies to issuers. On June 27, 2017, impacted issuers seeking compensation for the halted CSR subsidy payments commenced a class action lawsuit against the federal government in the Court of Federal Claims, captioned Common Ground Healthcare Cooperative v. United States, Case No. 17-877. In 2024, an agreement in principle was reached between class counsel on behalf of impacted issuers and the federal government to retroactively compensate the class. The settlement agreement was fully executed by the class and the federal government on August 11, 2025. On November 6, 2025, the Court of Federal Claims granted final settlement approval and ordered the distribution of 95% of the settlement funds, with the remaining 5% held until the attorneys’ fees award is determined. The estimated net recovery recorded as of December 31, 2025 was approximately $48 million, which was subsequently received in April 2026.