Same-sex marriage refers to lawful marriage between spouses of the same sex. Same-sex marriage is legal and recognized in every U.S. state and the District of Columbia (Washington, D.C.).

As long as a same-sex couple is married in a jurisdiction with legal authority to authorize the marriage, a health insurance company that offers health coverage to opposite-sex spouses must do the same for same-sex spouses.

The federal Health Insurance Marketplace® also treats married same-sex couples the same as married opposite-sex couples in every state when they apply for premium tax credits and lower out-of-pocket costs on private insurance plans.

In Oklahoma, as in all other U.S. states and the District of Columbia, same-sex marriage is legal and recognized. This means that same-sex couples have the same rights to marry as opposite-sex couples. Following the Supreme Court's decision in Obergefell v. Hodges in 2015, all states are required to issue marriage licenses to same-sex couples and recognize same-sex marriages performed in other jurisdictions. Consequently, health insurance companies in Oklahoma that provide coverage to spouses in opposite-sex marriages are also required to offer the same coverage to spouses in same-sex marriages. This extends to policies offered through employers or private plans. Additionally, the federal Health Insurance Marketplace® must treat married same-sex couples the same as married opposite-sex couples throughout the United States, including Oklahoma, when they apply for premium tax credits and lower out-of-pocket costs on private insurance plans.