Assessing and Improving WIC Enrollment in the Primary Care Setting: A Quality Initiative

The Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) provides food and other resources to mitigate the harmful effects of food insecurity on child and maternal health. From a 2009 peak, nationwide WIC participation declined through 2020. Our objectives were to understand factors influencing WIC engagement and improve WIC enrollment through novel, primary care-based quality improvement interventions.

Plan-do-study-act cycles were implemented at a majority Medicaid-insured pediatric primary care clinic. Universal WIC screening at <5-year-old well-child visits was initiated, with counseling and referrals offered to nonparticipants. Clinic providers received WIC education. WIC screening, counseling reminders, and referrals were streamlined via the electronic health record. Families were surveyed on WIC participation barriers. Patient demographic data were analyzed for predictors of WIC participation.

Mean new WIC enrollments increased significantly (42%) compared with baseline, with sustained special cause variation after study interventions. Provider WIC knowledge improved significantly at study end (P <.001). Rates of WIC screening, counseling, and referrals remained stable for >1 year after study interventions. The most common family-reported barriers to WIC participation were "Access problems" and "WIC knowledge gap." Factors associated with decreased WIC participation in multivariable analysis were increasing age (P <.001), and non-Medicaid insurance status (P = .03).

We demonstrate feasible primary care-based screening, education, and referral interventions that appear to improve WIC enrollment. We identify knowledge gap and access problems as major potentially modifiable barriers to WIC participation. The expansion of similar low-cost interventions into other settings has the potential to benefit under-resourced children and families.