Dental Benefits in Level Funded: Bundled, Carved Out, or Left to the Employee

The dental benefit decision is the most visible example of the integration question that defines benefits architecture for level funded plans. Three models exist: bundled into the level funded arrangement, carved out to a separate dental carrier, and left to the employee as a voluntary purchase. Most brokers present the choice as a preference. It is a plan design decision with economic, administrative, and member experience consequences that differ by employer segment. The choice between bundled and carved out functions as the entry point for a larger thesis: that benefits architecture is design, and that design produces different outcomes than accretion.

Three Models and Their Mechanics

#

Bundled dental places the benefit inside the level funded arrangement. The TPA administers dental as part of the same administrative platform that handles medical claims. Dental claims flow through the same claims fund, and the stop loss structure may or may not include dental claims in the aggregate attachment point calculation. The employer pays one invoice. The TPA handles dental eligibility, claims adjudication, and network access alongside the medical plan. For a 25 person group, this means a single vendor relationship, a single enrollment system, and consolidated reporting.

Carved out dental uses a separate dental carrier alongside the medical plan. Delta Dental, Cigna dental, MetLife, Guardian, and other national dental carriers provide the benefit through their own networks and administrative systems. Enrollment is separate. Premium is separate. Claims processing is separate. No data flows between the dental plan and the medical plan. The employer manages two vendor relationships instead of one.

Left to the employee means voluntary dental purchased by the employee at full premium, facilitated through the employer’s benefits platform but not employer sponsored. The employer provides access to a group rate but makes no contribution. The employee pays the full premium through payroll deduction. According to the National Association of Dental Plans, approximately 39 percent of commercial group dental enrollment is in voluntary rather than employer sponsored plans. The voluntary model produces the lowest employer cost (zero), but also produces the lowest take up rate, because employees who anticipate using dental benefits disproportionately enroll while those who do not anticipate utilization opt out. This adverse selection dynamic raises the voluntary premium relative to what a fully employer sponsored group rate would be.

The Economics of Each Model

#

The economic comparison is not abstract. For a 25 person group, the per member per month differential between bundled and carved out is calculable, and the variables are specific.

Bundled economics reflect lower administrative cost because the employer manages one vendor relationship and one enrollment system. The TPA’s dental network may be narrower or less favorably priced than a dedicated dental carrier’s network, which can offset the administrative savings. The potential exists for dental surplus inclusion if dental claims run below the funded amount, though stop loss carriers vary in how they treat dental in aggregate attachment point calculations. Some carriers exclude dental from the aggregate entirely, which changes the risk calculus for the employer.

Carved out economics reflect the purchasing power of large dental carriers. Delta Dental and VSP operate provider networks with negotiated rates that a TPA’s bundled dental network is unlikely to match in most markets. The separate premium is a known and predictable cost. The administrative overhead of managing a second vendor relationship is real but modest for an ancillary benefit with lower claims volume than medical. According to the KFF 2024 Employer Health Benefits Survey, 91 percent of employers offering health benefits also offer separate dental coverage, and the majority of these arrangements are carved out rather than bundled into the medical plan.

Voluntary economics produce the lowest employer cost (zero) but the lowest take up rate. The Aflac 2024 Employee Benefits Survey found that 51 percent of employees selected dental insurance after life insurance as the most valued supplemental benefit, and 91 percent rated dental insurance as important. Yet voluntary dental programs typically see take up rates below 50 percent in small groups because of the adverse selection dynamic: employees who anticipate needing fillings, crowns, or other dental work enroll, while employees with low expected utilization opt out, concentrating dental users in the covered population and raising premiums.

For a typical small group dental plan, employer sponsored coverage runs between $35 and $50 per employee per month for a standard PPO plan with preventive coverage, basic services at 80 percent coinsurance, and major services at 50 percent coinsurance. Voluntary plans run higher on a per enrolled member basis because of adverse selection, often reaching $45 to $65 per enrolled employee per month, though the employer’s cost remains zero. The differential between employer sponsored and voluntary becomes more pronounced in populations with higher expected dental utilization, because the adverse selection effect concentrates high users in the voluntary pool.

The Integration Question

#

The deeper analytical point is that dental claims carry medical information. The connection between periodontal disease and systemic health has been documented extensively. A 2023 consensus report from the European Federation of Periodontology and World Organization of Family Doctors found that people with diabetes and periodontitis had significantly higher risks of retinopathy (odds ratio 2.8 to 8.7), neuropathy (odds ratio 3.2 to 6.6), nephropathy (odds ratio 1.9 to 8.5), and cardiovascular complications (odds ratio 1.28 to 17.7) compared to those with diabetes and no periodontitis. The De Stefano National Health and Nutrition Examination Survey cohort study found that subjects with periodontitis had a 25 percent increased risk of coronary heart disease compared to those with minimal periodontal disease, adjusted for age, gender, race, education, systemic blood pressure, cholesterol, body mass index, diabetes, physical activity, alcohol consumption, and smoking.

A member whose dental claims show periodontal disease progression is a member at elevated cardiovascular risk and elevated diabetes complication risk. Research published in Frontiers in Public Health in 2023 found that periodontal treatment produces glycemic control benefits comparable to adding a second drug to the antidiabetic pharmacological regimen. Patients with periodontitis have a six fold higher risk of poor glycemic control compared to diabetic patients with healthy periodontium. The bidirectional relationship is clinically significant: treating periodontal disease improves diabetes management, and improved diabetes management reduces periodontal disease progression.

A bundled dental arrangement where claims data flows through the same system as medical claims can flag these correlations. A carved out arrangement cannot. The dental carrier processes claims in isolation. The medical plan processes claims in isolation. Neither sees the pattern that emerges when both streams are analyzed together. A 2017 study from Taiwan examining diabetic subjects over 10 years found that advanced periodontal treatment reduced the rates of myocardial infarction (hazard ratio 0.92) and heart failure (hazard ratio 0.60) compared to subjects without advanced treatment.

The integration value is real but unrealized in most level funded plans because the TPA does not have the analytics capability to use dental claims as medical risk signals. The TPA that can identify a member with worsening periodontal disease and route that member into a diabetes management program or cardiovascular screening is providing value that a carved out dental arrangement cannot match. The TPA that administers bundled dental with no claims integration is capturing administrative simplicity but missing the population health opportunity.

This distinction frames the series thesis. The dental decision is not only about cost. It is about whether the benefit component integrates with the medical core in a way that creates analytical value, or whether it sits alongside the medical plan as a separate product that happens to be offered by the same employer.

Which Model for Which Employer

#

The right answer depends on the employer segment.

The 8 person landscaping company should choose carved out or voluntary. The administrative simplicity of bundled dental matters less at this scale because the employer is already managing multiple vendor relationships (payroll, banking, insurance). The population is unlikely to have the chronic disease profile where dental medical correlation produces clinical value. The workforce is younger and has lower prevalence of the diabetes and cardiovascular conditions where periodontal data integration matters. The economic case for carved out dental is clear: better provider rates from a national carrier, predictable separate premium, and no sacrifice of meaningful integration value.

The 20 person professional services firm should consider bundled dental more seriously. The employer values integration. The workforce has the income and health profile where chronic disease management matters. The administrative simplicity of one vendor relationship is worth the potentially higher dental network cost. The population includes members in their 40s and 50s who are developing the cardiometabolic conditions where dental medical integration produces value. A TPA that can demonstrate it uses dental claims data for risk stratification makes a stronger case for bundled dental than a TPA that cannot.

The 40 person mixed income employer should evaluate based on population composition. If the workforce includes significant low income members, employer sponsored dental (bundled or carved out) produces better take up and better health outcomes than voluntary. The employer contribution matters more than the delivery model at this scale. Low income workers are more likely to forgo dental care entirely if it is not employer sponsored, which produces worse oral health, worse systemic health, and ultimately higher medical claims.

Closing

#

The dental decision is the first test of whether the employer approaches benefits as architecture or accretion. A broker who presents it as a preference is doing less than the analysis requires. A broker who evaluates bundled versus carved out on economics, integration potential, and population fit is doing benefits design. The distinction between bundled and carved out is the entry point for understanding how each ancillary component either connects to the level funded core or sits beside it without connection. Every article that follows in this series addresses the same question for different components.