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

Is a downgrade decided by the insurance company or the employer?

The same carrier and the same code split almost evenly at carrier level and land near-unanimously once you sort by employer group — with the carriers' own documents saying why.

"Cigna" is not a plan. Neither is "Delta Dental" or "MetLife". The carrier writes the alternate benefit provision into its contract language; the employer decides whether the plan it buys carries it. That is why a carrier-level downgrade rate is a starting prior and never an answer for the patient in your chair — and why the single most useful thing an office can record is not "this carrier downgrades" but "this employer group's plan downgrades, on these teeth". Measured across 3,790 employer groups in August 2026, the answer is settled within a group 97.7% of the time and at carrier level only 77.0%.

What we measured

Measured August 2026. "Settled" means the lines from that group agree with each other on the answer; a carrier-level figure of 77.0% means that nearly a quarter of the time, two plans from the same insurer disagree.

The clearest single case is Cigna and one-surface posterior composites (D2391). At carrier level: 58 lines downgraded, 56 not — a coin flip, and useless for an estimate. Sorted by employer group, the same lines are near-unanimous: 43 of 43 downgraded on one group, 40 of 40 never downgraded on another. The carrier-level noise was two opposite, internally consistent populations averaged together.

Nothing about the carrier-level rates hints at this. As of September 2026 they run from 1.4% (UnitedHealthcare) to 49.2% (Ameritas), with Guardian at 46.0%, MetLife 30.4%, Cigna 27.3%, Delta Dental 13.9%, Aetna 13.5% and Principal 13.3% — a spread measured across paid lines, not across employer groups. How many of each carrier's groups bought the provision is not something we have measured, because a few high-volume groups can dominate a carrier's line count.

What the carriers' own policies say

The carriers agree, and several say it in their own documents.

Cigna's carrier-wide clinical guideline explicitly subordinates itself to the plan: "These differences may include age limitations, frequency limitations, exclusion of coverage for certain procedures, and/or alternate benefit provisions. The member specific benefit plan documents… supersede Cigna Dental's Clinical Coverage Determination Guidelines." (Cigna Dental Coverage Determination Guidelines — DPPO, 2026.)

Blue Shield of California states the rule and the plan-level exception in one paragraph: "The use of composite or plastic materials on posterior teeth will be paid at the same level as the comparable amalgam restoration… If the Member's specific Dental Plan provides for posterior composite fillings as a benefit, then the DPA will not substitute the 'alternative benefit' of an amalgam filling for a posterior tooth." (Blue Shield of California HMO Benefit Guidelines, January 2026.)

Humana contradicts itself inside one brochure, correctly: one option flags "Alternate benefit of amalgam will be provided on posterior teeth" on D2391–D2394, and another in the same document says "Standard Advantage EPO option: There are no alternate benefits associated with this plan." (2026 Humana Dental FEDVIP Brochure, OPM 02AP-10.) Same insurer, same year, opposite answers.

UnitedHealthcare writes the provision as a discretion rather than a rule: "If more than one service or procedure can be used to treat the covered person's dental condition, UnitedHealthcare Dental may decide to authorize coverage only for the less costly covered service or procedure" (UnitedHealthcare Dental FEDVIP Official Plan Brochure 2025) — and where the limit does bind, it is the individual plan that says so rather than a carrier-wide rule: one of its PPO plan documents simply names the covered basic category "Restorations (Amalgam or Anterior Composite)" (UnitedHealthcare Dental Options PPO 30 Plan Document — Covered Services, form P0019), and a posterior composite meets the amalgam fee there without the word downgrade appearing anywhere. United Concordia makes it opt-in per contract, and says so repeatedly: "The Alternate Benefit Provision (ABP) limitation in some contracts…", "For any non-standard plan that chooses to apply an ALTERNATE BENEFIT PROVISION…" (United Concordia Dental PPO Clinical Policy, 2026). Aetna hedges on every clinical policy bulletin: "Under certain plans, if more than one service can be used to treat a covered person's dental condition, Aetna may decide to authorize coverage only for a less costly covered service."

And Delta Dental of Kansas publishes the purchase decision, with its own prevalence attached: "Posterior composites are an optional benefit and must be selected by the employer in order to be included in the patient's plan. Currently, more than 88% of our groups cover posterior composites." (Delta Dental of Kansas Dentist FAQs, undated.)

Why the carrier grain misleads in a specific way

It is not simply that the carrier number is imprecise. It is that averaging two unanimous populations produces a number that describes neither, and the direction of the error depends on which employers happen to be in your patient base. A 50% carrier rate does not mean each patient has even odds; it means about half of the lines we saw from that carrier were downgraded, which is what a mix of groups that always downgrade and groups that never do produces. An estimate built on the carrier rate will be wrong by the full difference, every time, in one direction per group.

The corollary is the useful part: one settled claim from a group is worth more than any carrier-level statistic, because the next claim from that group will match it about 98% of the time.

What to do

• Key your downgrade notes to the employer group number, not the carrier name, and keep the plan tier and the member's state beside it.
• Write the tooth scope down with the answer — "molars only", "all posterior", "multi-surface only" — since scope is a second variable that is also settled by group.
• Use the carrier rate only for a group you have never billed, and replace it with the group's own answer as soon as one claim settles.
• Compare the allowed amount to your contracted fee for the code you billed on that first claim, so the group's answer is recorded correctly even when the remittance says nothing.
• Do not let one plan's behaviour update the carrier note. A group that dropped the downgrade at renewal changes only that group.

Numbers last refreshed September 2026.

All articles · Kaylie