Gene therapy and million-dollar claims: what small and mid-size employers can do

Renewal Watch

A one-time therapy that costs more than the entire annual claims budget of a small employer is rare, but it is no longer exotic. For groups that are self-funded or level-funded, the response begins with the stop-loss contract.

Key takeaways

• List prices for approved gene therapies range from about $2.1 million to $4.25 million per patient. They are rare, but stop-loss premiums are rising because very large claims are growing.
• One 2026 stop-loss carrier report found claims more than $2 million above the deductible up 213% since 2020. A 2026 survey of 225 plans reported an average increase of 12.7% for like-for-like stop-loss coverage.
• What decides your exposure is the contract language: sublimits, exclusions for new therapies, and lasers on individual members.

How big, and how rare

Approved cell and gene therapies carry list prices of roughly $2.1 million to $4.25 million, depending on the product. A broker-industry estimate reported in July 2026 put incidence at about 6 gene therapy and 15 cell therapy cases per million covered lives per year, so a small employer is unlikely to see one in any given year. That is what makes the risk hard to price: it is unlikely for you and costly for the stop-loss carriers that pool many employers. They are responding with higher premiums. A 2026 industry survey of stop-loss buyers reported average increases of about 12.7% for like-for-like benefits, and another reported rates up 13.6% to 15.9% depending on deductible, with a preliminary forecast of about 14.5% for 2027.

Why it shows up in your renewal

Very large claims are growing quickly. One carrier report says claims over $2 million above the deductible are up 213% since 2020 and the largest claim in 2025 was almost $9 million. Cancer is a large share of paid claims. The same report found that groups that never raised their specific deductible saw larger rate increases than those that did. For a level-funded or self-funded employer, that means the specific stop-loss deductible, not just the premium, is a decision to revisit each year.

What to look for in the stop-loss contract

• Any exclusion or sublimit for gene or cell therapies, and how the contract treats new therapies approved after it starts
• Lasers: individual members assigned a higher deductible. Ask at the proposal stage whether any are in place and whether they can be added midterm
• The contract basis (incurred and paid, or paid) and runout terms
• Whether a therapy is covered under the medical or pharmacy benefit, and how that fits the stop-loss definition of eligible expense
• Notification requirements: stop-loss carriers expect early notice of high-cost claimants

Align the plan with the contract. Prior authorization, center-of-excellence requirements and case management help the plan control a large claim and satisfy the stop-loss carrier. Where a captive or pooled arrangement is available, compare it with a traditional stop-loss policy; see our page on group captives for the trade-offs.

Questions we get

Can a small employer be protected from a $3 million claim?

Specific stop-loss caps what you pay per person above the deductible, so the protection exists. The question is price and exclusions. Never assume a new therapy is covered; ask.

What about outcomes-based agreements with manufacturers?

Some exist, mostly through carriers and pharmacy benefit managers. We have not found a dependable path for small employers to arrange one directly, so ask your carrier what it offers.

Should we raise our specific deductible?

Often, a higher deductible lowers premium. The right level depends on your cash flow and tolerance for volatility. We model several levels with clients before the renewal.

Sources: 2026 reports on medical stop-loss claims and pricing from stop-loss carriers and benefits consultancies; a July 2026 industry report on cell and gene therapy utilization; manufacturer list prices as published in trade press. Figures come from secondary sources and vary by product and year.

Is your stop-loss contract ready for a new therapy? Send us your renewal and we will read the stop-loss terms for exclusions, lasers and notice rules.