Cost Nudges Had Minimal Effect on Clinic Selection as Tiered Benefit Design May Already Drive Smarter Choices: Tim McDonald, PhD, MPP, and Bryan E. Dowd, PhD

Why It Matters

The findings suggest that well‑structured tiered benefit designs can achieve substantial cost containment on their own, reducing the ROI of costly information‑based nudges for employers and insurers.

Key Takeaways

• 85% of members already chose Tier 1‑2 clinics before the nudge
• Family‑coverage enrollees shifted to lower tiers more than single enrollees
• Higher‑tier users who switched tended to move down to cheaper clinics
• SEGIP plans to add quality metrics to future enrollment communications
• Broad adoption of tiered networks could amplify cost‑containment across employers

Pulse Analysis

Tiered benefit designs have become a cornerstone of employer‑sponsored health plans, and the Minnesota SEGIP experiment underscores their potency. By assigning lower out‑of‑pocket costs to a predefined set of primary‑care clinics, the program nudged 85% of its workforce into the cheapest tiers without any additional outreach. This baseline efficiency mirrors the success of similar network‑based models in other large payers, where financial incentives are embedded directly into plan architecture rather than relying on post‑enrollment education.

The modest impact of the email nudges highlights a broader truth about consumer information: awareness alone rarely overturns entrenched preferences. Even when members appreciated the data, only families—who stand to save more—and higher‑tier users who chose to switch showed any measurable movement. This aligns with behavioral economics research showing that cost‑saving nudges are most effective when the perceived benefit outweighs the friction of change. For health plans, the lesson is clear: investing heavily in generic messaging may yield diminishing returns unless paired with structural incentives that make the cheaper option the path of least resistance.

Looking ahead, the study’s authors advocate a hybrid strategy that couples tiered networks with transparent quality metrics and robust incentive alignment. By rewarding efficient, high‑quality clinics with higher patient volumes and penalizing outliers, insurers can amplify the cost‑containment achieved by tiering alone. If large employers and programs like Medicare adopt similar designs, the cumulative effect could reshape market dynamics, driving a shift toward value‑based care while preserving consumer choice. The SEGIP case thus offers a roadmap for scaling cost‑effective benefit design across the U.S. health‑care landscape.