What D6073 means

D6073 covers an abutment-supported retainer for a cast metal FPD, predominantly base metal. "D" is dental, "60" places it in the implant services area, and "73" is this abutment-supported cast-metal base-metal FPD-retainer code. It's the same full-metal/base-metal construction as D6063, but functioning as a bridge RETAINER. So D6073 is the full-metal/base-metal anchor crown of an implant bridge, on a separate abutment.

So it's the same solid base-metal crown as D6063, but here it's one anchor of a bridge, typically a back-tooth bridge.

D6073 combines two economy-oriented features in the retainer context: retainer role (shared with the whole family) — anchors one end of an implant-supported bridge, carrying transmitted forces from the pontic; abutment-supported — sits on a separate ABUTMENT (D6056/D6057), billed separately; cast metal (full metal, same as D6072/D6074) — no porcelain, maximizing strength and fracture resistance for the whole bridge span; predominantly base metal (same standard as D6063/D6070) — the alloy is mostly non-precious (<25% noble content) — nickel-chromium, cobalt-chromium, etc. — strong, rigid, and the LEAST costly metal class; the double economy, bridge-scale — choosing both full metal (versus PFM's added porcelain cost/complexity) AND base metal (the cheapest alloy) makes D6073 often the most economical retainer option, and this economy MULTIPLIES across however many retainers a bridge has; strength retained — base alloys remain strong and rigid; the crown's fundamental durability isn't compromised; considerations — nickel sensitivity in some patients is a factor, as with single crowns; the cast-metal retainer trio — D6072 (high noble), D6073 (predominantly base — this code), D6074 (noble) mirror the single-crown cast-metal trio (D6062-D6064); and per-retainer, per-bridge coding — this code applies to EACH retainer that is cast-metal/base-metal on that bridge. Distinguish by MATERIAL from D6068 (all-ceramic) and D6069-D6071 (PFM); by METAL CLASS from D6072 (high noble) and D6074 (noble); by ROLE from the single-crown code D6063; by SUPPORT from implant-supported retainers. Coverage varies. This code is in the implant services area. Documentation supports the claim.

When it's typically used

D6073 is reported for each abutment-supported cast (full) metal retainer crown, made with PREDOMINANTLY BASE metal, anchoring an implant-supported bridge (FPD) — used when full-metal strength and economical alloy cost are both priorities across a bridge, typically for posterior bridges. It's coded per retainer, alongside the abutment and the bridge's pontic code(s). Distinct by material from D6068/D6069-D6071, by metal class from D6072/D6074, and by role from the single-crown code D6063.

How much does D6073 cost?

An abutment-supported cast base-metal FPD retainer's cost reflects a full-metal retainer crown made from a non-precious alloy — generally the least expensive full-metal option — plus, separately, the abutment (D6056/D6057) and the bridge's other components. This economy compounds favorably across a multi-unit bridge. Coverage varies (implant/bridge benefits often subject to alternate-benefit, missing-tooth, and per-unit limitations). Verify coverage with the relevant plan.

Is D6073 covered by insurance?

Coverage for D6073 varies. As one component of a bridge, the claim typically includes the abutment, this retainer (per implant anchor using this material), the other retainer, and the pontic(s) as separate line items. Reporting the correct MATERIAL (cast metal, not PFM or ceramic) and METAL CLASS (predominantly base = D6073) is essential. If there's no implant/bridge coverage, an alternate benefit may apply; missing-tooth clauses and per-unit limitations are common. Documentation supports the claim. Verifying coverage helps.

Economy compounding across a bridge's retainers

Two cost-saving choices, multiplied by unit count, and understanding this clarifies the code.

Understanding D6073's economics clarifies the code. Like D6063 (its single-crown counterpart), D6073 stacks full metal (no porcelain) with base metal (least costly alloy) — but here the savings apply across MULTIPLE bridge units: shared full-metal case — no porcelain to chip, maximum fracture resistance, precise thin fit, and (with appropriate alloys) tooth-friendly wear — the same mechanical logic as any cast-metal retainer; base-metal alloy — mostly non-precious content, the least expensive metal class, while remaining strong and rigid; the bridge multiplier — a bridge with two implant anchors, both using D6073, pays the economical base-metal rate TWICE (once per retainer), compared to potentially paying the high-noble rate twice if D6072 were used instead; the pontic often follows — if cost is the driver for choosing base metal at the retainers, the pontic (if metal-containing) is typically matched to base metal too, compounding the savings further across the whole restoration; and the retained strength case — economy doesn't mean a weaker bridge; base-metal retainers still provide full-metal-level strength, appropriate for the heavy loads a posterior bridge experiences.

So D6073's economy is most impactful precisely because a bridge multiplies the number of metal-containing components. So D6073's base-metal economy compounds favorably across a bridge's multiple retainers. Understanding this helps patients see that like D6063/its single-crown counterpart D6073 stacks full metal/no porcelain with base metal/least costly alloy but here the savings apply across MULTIPLE bridge units — shared full-metal case (no porcelain to chip, maximum fracture resistance, precise thin fit, and with appropriate alloys tooth-friendly wear, the same mechanical logic as any cast-metal retainer), base-metal alloy (mostly non-precious content, the least expensive metal class, while remaining strong and rigid), the bridge multiplier (a bridge with two implant anchors both using D6073 paying the economical base-metal rate TWICE/once per retainer, compared to potentially paying the high-noble rate twice if D6072 were used instead), the pontic often follows (if cost is the driver for choosing base metal at the retainers the pontic/if metal-containing typically matched to base metal too, compounding the savings further across the whole restoration), and the retained strength case (economy not meaning a weaker bridge, base-metal retainers still providing full-metal-level strength appropriate for the heavy loads a posterior bridge experiences) — so D6073's economy being most impactful precisely because a bridge multiplies the number of metal-containing components.

Same alloy science, bridge-scale stakes

The definition doesn't change, but the total cost impact does, and understanding this clarifies the coding.

Understanding the consistency and stakes clarifies D6073. The base-metal alloy definition used here is identical to every other appearance of 'predominantly base' in this code family: the unchanged definition — less than 25% noble (precious) metal content, mostly non-precious metals like nickel-chromium or cobalt-chromium — same as D6063 (single crown) and D6070 (PFM retainer); why repeating this matters for D6073 specifically — because a bridge involves multiple retainers (and possibly a metal pontic), getting the metal-class code right on EACH component has a magnified effect on the accuracy of the whole claim; a single miscoded retainer among several can throw off the entire bridge's billing; documentation discipline at bridge scale — for a multi-retainer bridge using base metal, the lab prescription and treatment record should specify the alloy for EACH retainer clearly, since bridges involve more components to track than a single crown; consistent alloy across retainers — most bridges use the SAME metal class for all metal-containing components (both retainers, and the pontic if metal-containing), simplifying both the clinical logic and the coding, though mixed cases are possible; and the takeaway — D6073 requires the same alloy verification discipline as D6063, just applied more times (once per retainer) within a single bridge case.

So the science is unchanged, but a bridge's multiple components raise the stakes for getting the metal-class code right every time. So D6073 uses the same base-metal definition as D6063, with accuracy mattering across multiple bridge components. Understanding this helps patients see that the base-metal alloy definition used here is identical to every other appearance of 'predominantly base' in this code family — the unchanged definition (less than 25% noble/precious metal content, mostly non-precious metals like nickel-chromium or cobalt-chromium, same as D6063/single crown and D6070/PFM retainer), why repeating this matters for D6073 specifically (because a bridge involves multiple retainers and possibly a metal pontic, getting the metal-class code right on EACH component having a magnified effect on the accuracy of the whole claim, a single miscoded retainer among several able to throw off the entire bridge's billing), documentation discipline at bridge scale (for a multi-retainer bridge using base metal the lab prescription and treatment record should specify the alloy for EACH retainer clearly, since bridges involve more components to track than a single crown), consistent alloy across retainers (most bridges using the SAME metal class for all metal-containing components/both retainers, and the pontic if metal-containing, simplifying both the clinical logic and the coding, though mixed cases being possible), and the takeaway (D6073 requiring the same alloy verification discipline as D6063, just applied more times/once per retainer within a single bridge case) — so the science being unchanged, but a bridge's multiple components raising the stakes for getting the metal-class code right every time.

Full-metal, economical retainers in practice

A common, practical choice for functional posterior bridges, and understanding this clarifies its use.

Understanding real-world use clarifies D6073. Full-metal, base-metal bridge retainers represent a mainstream, functional choice for many posterior bridge cases: cost-conscious posterior bridges — where a patient needs a durable back-tooth bridge and cost is a meaningful consideration, cast-metal/base-metal retainers deliver reliable strength at the lowest metal expense; strength for demanding function — molars and premolars handle high chewing forces; a full-metal retainer resists fracture better than a porcelain-containing option would, and base alloys retain that strength advantage; not a lesser choice by default — as with single crowns, base-metal cast retainers are a legitimate, well-established option — many successful, long-lasting bridges use them; when a costlier alloy is chosen instead — if a patient/clinician prioritizes maximum biocompatibility or precious-metal track record regardless of cost, D6072 (high noble) or D6074 (noble) would be used instead; nickel sensitivity check — as always, patients with known nickel sensitivity may need a different alloy (noble or high noble) to avoid certain base alloys; and the whole-bridge decision — the retainer material decision for D6073 typically travels together with matching the pontic material, so the entire bridge is built with a consistent, economical, durable full-metal approach where that's the chosen path.

So D6073 represents a practical, durable, economical choice for many functional posterior implant bridges. So D6073 is a mainstream choice for cost-effective, durable posterior bridge retainers. Understanding this helps patients see that full-metal base-metal bridge retainers represent a mainstream functional choice for many posterior bridge cases — cost-conscious posterior bridges (where a patient needs a durable back-tooth bridge and cost is a meaningful consideration, cast-metal/base-metal retainers delivering reliable strength at the lowest metal expense), strength for demanding function (molars and premolars handling high chewing forces, a full-metal retainer resisting fracture better than a porcelain-containing option would, and base alloys retaining that strength advantage), not a lesser choice by default (as with single crowns base-metal cast retainers being a legitimate well-established option, many successful long-lasting bridges using them), when a costlier alloy is chosen instead (if a patient/clinician prioritizes maximum biocompatibility or precious-metal track record regardless of cost, D6072/high noble or D6074/noble being used instead), nickel sensitivity check (as always patients with known nickel sensitivity possibly needing a different alloy/noble or high noble to avoid certain base alloys), and the whole-bridge decision (the retainer material decision for D6073 typically traveling together with matching the pontic material, so the entire bridge is built with a consistent economical durable full-metal approach where that's the chosen path) — so D6073 representing a practical durable economical choice for many functional posterior implant bridges.

Where D6073 fits in the codes

D6073 is the base-metal cast-metal abutment-supported retainer, and understanding this clarifies the coding.

Understanding where D6073 sits clarifies the coding. D6073 is among the implant services codes (D6000s), in the abutment-supported FPD retainer series, in the CAST METAL sub-group by metal class: abutment-supported cast metal retainers — D6072 (high noble), D6073 (predominantly base — this code), D6074 (noble); other abutment-supported retainer materials — D6068 (all-ceramic), D6069/D6070/D6071 (PFM by metal class); implant-supported retainer counterpart — D6077; the single-crown parallel — D6063 (the same cast-metal/base-metal combination, but for a stand-alone crown); and the abutments — D6056/D6057.

So D6073 is precisely: an abutment-supported cast (full) metal retainer crown with PREDOMINANTLY BASE metal, anchoring one end of an implant-supported FPD. It's distinguished from D6068 (all-ceramic) and D6069-D6071 (PFM) by material, from D6072 (high noble) and D6074 (noble) by metal class, from the implant-supported retainer (D6077) by support type, and from D6063 by role (bridge retainer vs single crown). The provider codes D6073 for each cast-metal-base-metal retainer (plus the abutment and pontic separately). So D6073 is the base-metal cast-metal member of the abutment-supported FPD retainer series. Understanding this helps patients see that D6073 is among the implant services codes (D6000s) in the abutment-supported FPD retainer series, in the CAST METAL sub-group by metal class — abutment-supported cast metal retainers (D6072/high noble, D6073/predominantly base, this code, D6074/noble), other abutment-supported retainer materials (D6068/all-ceramic, D6069/D6070/D6071/PFM by metal class), implant-supported retainer counterpart (D6077), the single-crown parallel (D6063, the same cast-metal/base-metal combination but for a stand-alone crown), and the abutments (D6056/D6057) — so D6073 is precisely an abutment-supported cast (full) metal retainer crown with PREDOMINANTLY BASE metal, anchoring one end of an implant-supported FPD, distinguished from D6068 (all-ceramic) and D6069-D6071 (PFM) by material, from D6072 (high noble) and D6074 (noble) by metal class, from the implant-supported retainer (D6077) by support type, and from D6063 by role (bridge retainer vs single crown), the provider coding D6073 for each cast-metal-base-metal retainer (plus the abutment and pontic separately).

Frequently asked questions

What is the D6073 dental code?

It's an abutment-supported retainer crown for a fixed partial denture (FPD, i.e., a bridge), made of cast metal with predominantly base metal — a full-metal, economical retainer anchoring one end of an implant-supported bridge. It's the same construction as D6072, but with a base-metal alloy instead of high noble, mirroring D6063's role among single crowns.

Why does base metal matter more for a bridge retainer?

Because a bridge has multiple retainers (and possibly a metal pontic), so the cost of the alloy multiplies across units. Choosing base metal keeps the per-retainer alloy cost low across however many retainers the bridge has, compounding the savings compared to a costlier alloy used repeatedly.

Does base metal weaken the retainer?

No — base alloys are strong and rigid, so the retainer keeps full-metal-level durability. The economy comes from the alloy's lower precious-metal content, not from reduced strength. Base-metal cast retainers are a legitimate, well-established, and widely used option for demanding posterior bridges.

How is D6073 different from D6072 and D6074?

Only the metal class differs. All three are abutment-supported cast (full) metal bridge retainers with identical construction. D6072 uses high noble (priciest), D6074 uses noble (middle tier), and D6073 uses predominantly base metal (most economical) — mirroring the single-crown cast-metal trio (D6062-D6064).

Should the pontic match the retainer material?

Typically, yes — if base metal is chosen for cost reasons at the retainers, the pontic (if metal-containing) is usually matched to base metal too, extending the cost savings across the whole bridge and keeping the restoration mechanically and esthetically consistent.

Is it covered by insurance?

Coverage varies. As one component of a bridge, the claim typically includes the abutment, this retainer, the other retainer, and the pontic(s) as separate line items. Reporting the correct material (cast metal, not PFM or ceramic) and metal class (base = D6073) is essential. If there's no implant/bridge coverage, an alternate benefit may apply; missing-tooth clauses and per-unit limitations are common. Verify your coverage.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.