Claims · Updated 2026-09-08 · 5 min read

Which dental insurers downgrade crowns?

Crown downgrade rates for eleven carriers, the cast-metal codes a porcelain crown is paid as, and the three different tooth scopes carriers publish.

Crown downgrades are far less uniform than filling downgrades. As of September 2026 the measured rate on paid crown lines runs from zero — Humana and United Concordia downgraded none of the crowns we saw them pay — to 46.2% (Guardian), and the carriers are spread along that range rather than sorted into two camps: Guardian, Ameritas and MetLife downgrade close to half of the crowns we see them pay, Cigna at 28.0% and Aetna at 18.6% sit between, and Delta Dental, Anthem and UnitedHealthcare downgrade fewer than one in ten, with Principal at about one in ten. What a downgraded crown is paid as is more consistent: a cast-metal crown of a named metal grade — D2740 and D2750 to D2790, D2751 to D2791, D2752 to D2792 — and, on most carriers' published wording, only on molars.

What we measured

A line is one procedure on one claim; these are paid explanation-of-benefits lines on porcelain, ceramic and porcelain-fused-to-metal crown codes, pooled across the practices Kaylie serves, measured on 8 September 2026. The Ameritas, Aetna, Principal, Anthem, Humana and United Concordia rows are built on fewer than 100 lines each — directional, not precise. "Silent" means the remittance carried no downgrade remark, but the allowed amount was below the contracted fee for the billed code, or the carrier issued a substitute line: on crowns that is a third of Delta's downgrades (57 of 170) and 28 of Cigna's 205.

What the carriers' own policies say

Three different tooth scopes. MetLife's provider manual scopes its crown rule to molars and names the substitute: "When porcelain fused to metal crown or any type of veneer material is submitted on a molar tooth, MetLife may apply an alternate benefit of a full gold crown." (MetLife Preferred Dentist Program (PDP) Resource Manual, undated.)

Delta's federation-wide "Optional Services" list is narrower still, and the only carrier sentence in the cluster that distinguishes arches: "porcelain, resin or similar materials for crowns placed on a maxillary second or third molar, or on any mandibular molar (an allowance will be made for a porcelain fused to high noble metal crown)." (Delta Dental of Pennsylvania Individual & Family PPO Preferred Plan, 2025.) The upper first molar is not in scope. Delta Dental of Oregon draws it one tooth further forward and substitutes a different material: "Porcelain crowns are considered cosmetic dentistry if placed on the upper second or third molars or the lower first, second or third molars. Coverage is limited to gold without porcelain." (Delta Dental PPO 1000 Oregon Group Dental Plan Handbook, 2026.)

Aetna is the broad end: "D2740 Crown - porcelain/ceramic — An alternate benefit will be provided on posterior teeth", with the same flag across D2750, D2751, D2752 and the abutment, pontic and retainer-crown families (Aetna Dental FEDVIP 2026 Brochure, OPM).

Blue Shield of California frames it as cosmetics rather than materials: "Full ceramic, porcelain, ceramic-porcelain crowns are considered cosmetic procedures for anterior and posterior teeth; reimbursement will be at the same level as the appropriate metal or porcelain-nonprecious metal crown for the tooth." (Blue Shield of California HMO Benefit Guidelines, January 2026.)

And on a copay-schedule dental HMO there is no allowance to re-base, so most price the better material as a surcharge instead: "porcelain, resin or resin-based composite is used on molar crowns, the member is responsible for an additional $75 co-payment above the set crown co-payment" (MetLife SafeGuard DHMO Schedule of Benefits, undated); "an additional $125 for the use of precious (high noble) or semi precious (noble) metal" (United Concordia Active DHMO Schedule of Benefits, Concordia Plus CA 21, undated); "$150 per unit" on Blue Shield of California's dental HMO products. Blue Shield of California is also the exception that states a substitution outright: the HMO Benefit Guidelines quoted above re-base a ceramic crown to the metal crown allowance, while its own dental HMO products still carry the per-unit metal charge.

One thing a downgraded crown is not is necessarily a cheaper crown. The named targets include full cast high noble — gold — so the substitution is about the material the contract will pay for, not about a smaller number.

Why it depends on the plan group

Crown scope is a plan-level setting, and it can drop out of a plan entirely: Delta's Georgia Basic tier carries only the composite example from the Optional Services list, while the Preferred and Premium tiers carry the crown clause too, because a tier that sells no Major coverage has no crown benefit to re-price. Measured across 2,748 employer groups in August 2026, the tooth-scope answer is settled within the group 97.4% of the time and at carrier level only 77.6%.

What to do

• Compare the allowed amount to your contracted fee for the crown code you billed. On crowns the silent share is higher than on fillings for both Delta and Cigna.
• Write the tooth number and arch into the note, not "molar". Upper first molars are outside Delta's Pennsylvania, Georgia and California wording and inside Oregon's.
• Put the substitute code in the pre-treatment estimate — D2790, D2791 or D2792 — so the patient's number is explainable when the explanation of benefits arrives.
• Record the answer against the employer group number and the plan tier.
• On a dental HMO, look for a materials surcharge instead, capped per unit, and quote that rather than a percentage difference.

Numbers last refreshed September 2026.

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