Cost sharing, postpartum contraceptive use, and short interpregnancy interval rates among commercially insured women

Increasing access to effective birth control after childbirth may meet many women’s preferences and reduce short interpregnancy interval rates. Eliminating out-of-pocket costs for contraception has been reported to increase the use of the most effective methods among women with employer-based insurance, but the prevalence and effects of patient cost sharing for contraception have not been studied during the postpartum period. This study aimed to examine the association between cost sharing for long-acting reversible contraception and postpartum contraception use patterns and pregnancies in the 12 months after delivery. We conducted a retrospective cohort analysis of commercially insured women undergoing childbirth from 2014 to 2018 using Optum’s (Eden Prairie, MN) de-identified Clinformatics Data Mart database. This large national database includes nonretired employees and their dependents who are enrolled in health insurance plans sponsored by large- or medium-sized US-based employers. Women with 12 months of continuous enrollment postpartum were included. Childbirth, pregnancy, and contraceptive method (female sterilization, long-acting reversible contraceptives, other hormonal methods, and no prescription method observed) were identified using claims data. Contraceptive use patterns were observed at 3, 6, and 12 months postpartum and adjusted for individual and plan characteristics. Median out-of-pocket costs were $0 for sterilization and other hormonal methods but nonzero for long-acting reversible contraception. We therefore used simple and multivariable logistic regressions to examine the association between plan-level cost sharing (no cost sharing, $0; low cost sharing, >$0–