Insurance · Updated 2026-09-09 · 5 min read

Does my old insurance count against my new dental plan?

Often yes. Several plans count a service performed before your coverage started; others count only what they paid for. The sentence is in the plan document.

Often yes, and it is stated in the plan document rather than being a claims-department habit. Several carriers write that a service performed before the patient's coverage with them began still counts toward the time, frequency and replacement limits — so a crown seated under the previous carrier three years ago leaves two years on a five-year clock the new plan enforces. Others write the opposite, counting only a placement made while the patient was covered under that same plan, which resets the clock at the switch. The rule matters most on the long clocks — crowns, bridges, dentures and implants, where the interval is five to ten years and the patient has usually changed jobs inside it. As of September 2026, across every practice Kaylie serves, only 46 claim lines carried a refusal for a replacement made too soon, and 1.6% of Delta Dental porcelain-crown lines were refused for frequency.

What we measured

Adjudicated claim lines across the practices Kaylie serves, all dates in the record, measured September 2026; a line is one procedure on one claim, and only cells with at least five practices and 100 lines appear. No other carrier and crown cell cleared that floor.

Two smaller counts sit beside it. Crown-replacement refusals mostly arrive under a replacement-made-too-soon or a not-covered reason rather than as a frequency overage, and the replacement-made-too-soon reason itself carries only 46 lines across the practices measured. And on 22 claim lines across six of the practice groups we serve the whole refusal rested on a sentence stating the existing restoration's minimum age rather than a window since the last service — the wording that decides this question.

What the carriers' own policies say

The clearest statement that the clock predates the coverage is federal: "When dental services that are subject to a frequency limitation were performed prior to your effective date of coverage, the date of the prior service may be counted toward the time, frequency limitations and/or replacement limitations under this dental insurance." (2026 BCBS FEP Dental Official Brochure (OPM FEDVIP, High Option & Standard Option).) Note the breadth — this is any service subject to a frequency limitation, not only a crown.

One commercial plan says it for major restorations and closes the obvious argument in the same sentence: "Benefits for major restorations are limited to one per tooth every 60 months whether placement was provided under this Policy or under any prior dental coverage, even if the original crown was stainless steel." (BlueCare Dental 1D Required Outline of Coverage (Individual), 2025.)

Three documents state the opposite, and the difference is one clause. "Benefits for replacement shall not be provided for … any denture replacement inlay, crown or onlays made less than five (5) years after a placement or replacement which was covered under this Plan of Benefits" (BCBS South Carolina Dental Blue Policy and Outline of Coverage, 2026). "Dentures (full or partial): Replacement only after five (5) years have elapsed following any prior provision of such Dentures under a SafeGuard Plan" (MetLife SafeGuard DHMO Schedule of Benefits, MET245 Texas, 01/26). And a state-employee plan handbook goes furthest, paying a replacement of a gold or crown restoration only where the restoration was installed while the patient was covered under that same plan and at least five years earlier. On that one a crown placed under a previous carrier is not replaceable at all — a condition, not a clock.

Where the clock runs from is stated too, and it is the older restoration's date rather than the new plan's start date: replacement of a bridge, crown or denture is covered "if it is more than five (5) years from the date of original placement" (2026 Humana Dental FEDVIP Brochure (OPM 02AP-10)), and "Benefits for replacement will be based on the prior placement date." (Over 400 Covered Dental Procedures, form DNTL_PDF_CP02_0126, retrieved 2026.)

On the preventive side, the same logic follows from how the interval is written. Where a plan measures backwards from the patient's own last visit, the visit counts whoever paid for it: preventive limits "are based on the month of service and are measured backward from the date of the most recent service in each category." (TRICARE Dental Program Handbook Supplement – Benefits Booklet, January 2025.)

Why it depends on the plan

The new carrier only enforces what it is told. The prior-placement date is a field on the claim — box 44 of the ADA claim form, filled in by the office: "Item 44 — Date Prior Placement — Print the date of the prior placement of the prosthesis identified in Item 43" (Delta Dental of New Jersey 2023 Participating Dentist Handbook). So the practical answer often turns on the practice's own records rather than on data the carrier already holds.

The clock's start point can also be later than the patient thinks. Where a plan defines it, "the completion date for crowns is the cementation date" and "the completion date is the insertion date for removable prosthodontic appliances" (2026 BCBS FEP Dental Official Brochure). A temporary can start it too: "After 12 months, provisional/temporary restorations are considered permanent restorations and will be subject to the five-year replacement rule" (2026 GEHA Plan Manual for Dental Providers).

And the clock is rarely the only test. Several plans require the existing restoration to be unserviceable as well as old — the years passing is necessary, not sufficient.

What to do

• Ask the new carrier the question in its own words: does the frequency or replacement limit count services performed before the effective date of this coverage?
• Get the prior-placement date from the patient at the treatment plan stage, not at the appeal. On a replacement claim carriers ask for it on the form.
• Record the seat or cementation date, not the preparation date, and record it per tooth.
• Treat a temporary in place for a year as a permanent restoration on the plans that say so, rather than assuming the definitive crown starts a fresh clock.
• Where the plan counts only its own placements, say so in the estimate. The patient who changed jobs may be better off than they expect, and that is worth telling them before treatment.

Numbers last refreshed September 2026.

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