Claims · Updated 2026-09-08 · 6 min read

What does insurance downgrade a porcelain crown to?

D2740 and the PFM crown codes, the full-cast codes they are paid as, and the same substitution applied to bridge retainers and pontics.

A downgraded crown is paid at the full-cast code of the matching metal grade: a porcelain or ceramic crown (D2740) and a porcelain-fused-to-high-noble crown (D2750) at D2790, full cast high noble; a porcelain-fused-to-base-metal crown (D2751) at D2791; a porcelain-fused-to-noble crown (D2752) at D2792. The same substitution runs through fixed bridgework: ceramic and PFM retainer crowns (D6740, D6750, D6751, D6752) and PFM pontics (D6240, D6241, D6242) are paid at D6790, D6791 and D6792, which are full cast retainer crown codes — so on a pontic line the substitution targets a retainer crown, not a pontic. The usual scope is permanent molars, and note what the target is not: a full cast high noble crown is a gold crown, so "downgrade" here names the material the contract will pay for, not necessarily a smaller number.

The pairs

These pairs are the default applied when a plan says an alternate benefit applies without naming a target; individual carriers publish their own lists, and United Concordia's and Aetna's differ. Note also that the pontic row's target is a retainer crown.

The cast-crown pairs are scoped to permanent molars because a primary tooth gets a prefabricated crown, not a cast one — and that has its own substitution, tooth-coloured prefabricated to stainless steel.

What we measured

Bridge retainers and pontics were downgraded on 24.0% of Delta's 196 paid lines, 16.5% of Cigna's 115 and 7.5% of MetLife's 80. A line is one procedure on one claim; these are paid explanation-of-benefits lines pooled across the practices Kaylie serves, measured on 8 September 2026. Rows built on fewer than 100 lines — Ameritas, Aetna, Principal — are directional, not precise.

What the carriers' own policies say

MetLife names the substitute outright: "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. The dentist may bill the participant any difference up to the plan allowance for the service actually rendered." (MetLife Preferred Dentist Program (PDP) Resource Manual, undated.) Note that its clause covers onlays as well as crowns.

Delta names a different substitute and a narrower tooth list: "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.) Delta Dental of Oregon substitutes gold with no porcelain, and includes the lower first molar (Delta Dental PPO 1000 Oregon Group Dental Plan Handbook, 2026).

Aetna carries the flag across the whole family: "D2740 Crown - porcelain/ceramic — An alternate benefit will be provided on posterior teeth", repeated across D2750, D2751, D2752 and the parallel abutment, pontic and retainer-crown codes (Aetna Dental FEDVIP 2026 Brochure, OPM).

Two rules are regularly mistaken for a crown downgrade and are not one. The first is a necessity gate that denies the crown: Cigna excludes "Crowns, inlays, cast restorations, or other laboratory prepared restorations on teeth unless the tooth cannot be restored with an amalgam or composite resin filling due to major decay or fracture" (Cigna Healthcare Dental IFP Plan 3000/100 Summary of Benefits, Total network, 2025). The second is a crown re-priced to a filling rather than to a cheaper crown — one of Delta's listed Optional Services is "a crown where a filling would restore the tooth", and TRICARE's handbook says "if the tooth can be adequately restored with amalgam or composite (resin) filling material, payment will be made for that service" (TRICARE Dental Program Handbook, 2025/2026).

Why it depends on the plan group

Inside one carrier, the crown clause can be absent. Delta's Georgia Basic tier carries only the composite example from its Optional Services list; the Preferred and Premium tiers carry the crown clause as well, because a tier with 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

• Bill the crown you placed. The substitute code belongs on the explanation of benefits, not on the claim.
• Compare the allowed amount to your contracted fee for the crown code you billed. On crowns this catches more than remarks do — 57 of Delta's 170 crown downgrades and 28 of Cigna's 205 carried none.
• Put the substitute code and its allowed amount in the pre-treatment estimate, so the patient's share is explainable when the claim comes back.
• Record the tooth number and arch with the group number. "Molars" is not precise enough when carriers differ on the upper first molar.
• On a dental HMO, expect a materials surcharge instead of a substitution — a fixed amount per unit for porcelain or noble metal, which is quoted differently.

Numbers last refreshed September 2026.

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