Though both are ?preventive services? requirements, and in spite of significant overlap, the WPS Guidelines and the EHB standard are distinct. The WPS Guidelines will extend coverage of critical preventive services that include contraception, without cost-sharing, to many women covered in the private insurance market both inside and outside of state health insurance Exchanges. The EHB standard will apply to many of the same private plans, but will also extend to enrollees in public insurance programs. Though early guidance assures that both standards will cover the same services, the EHB standard is still being defined and many questions remain. This paper explains these two standards and analyzes how they differ, interact, and affect contraceptive coverage in different types of private and public health insurance.