D5140 Dental Code: Immediate Lower Denture Billing Guide

What D5140 covers

D5140 reports an immediate complete denture on the mandibular (lower) arch. The denture is built from impressions taken while the patient still has lower teeth, then seated at the same appointment where the remaining mandibular teeth are extracted, directly on the surgical ridge. The code covers the pre-extraction impressions, laboratory fabrication, delivery, and the limited adjustments inside the standard delivery period.

It does not cover:

• A conventional complete lower denture made on a healed ridge. That is D5120.
• An immediate complete denture on the upper arch. That is D5130. A wrong arch indicator is a common preventable rejection.
• A conventional complete upper denture. That is D5110.
• The extractions performed at the same visit. Those bill per tooth on the D7140 and D7210 extraction families.
• The later reline or rebase. See the refit codes below.
• Partial dentures for a patient who keeps some lower teeth. Those are the D5211 to D5226 resin-based series or the D5213 to D5214 cast-metal series.
• An implant-supported overdenture. That is the D6110 to D6113 series.

D5140 versus D5120: immediate versus conventional

D5140 and D5120 describe the same lower denture. The code depends on when it is delivered relative to healing.

Immediate (D5140):

• Impressions are taken before the extractions, while the lower teeth are still present.
• The lab removes the teeth to be extracted from the working cast and builds to the projected post-extraction contour.
• The denture is seated the same day the lower teeth come out.
• The ridge is surgical and will resorb, so a reline or remake is expected, and on the lower arch it comes early.

Conventional (D5120):

• Extractions come first, then weeks to months of healing.
• Final impressions are taken on a settled mandibular ridge.
• The denture fits the healed anatomy and needs less early refitting.

Billing D5120 for a denture seated the day of surgery misstates the procedure. The extraction dates document the same-day delivery.

Why the lower immediate is the harder case

An immediate lower denture combines two retention problems. The mandibular ridge resorbs more aggressively than the maxilla, and a lower denture has no palate to grip, so it depends on ridge fit, border seal, and the patient’s tongue control. On a freshly extracted ridge, the fit changes fast.

As a result, refit codes come up sooner and more often on D5140 cases than on upper immediates. Each bills on its own date of service:

• D5731 reline complete mandibular denture, chairside.
• D5751 reline complete mandibular denture, laboratory.
• D5711 rebase complete mandibular denture, when the whole base is replaced.

Coverage is plan-dependent. Many plans decline a reline within a set window after a new denture, often 6 months or more, treating early refitting as part of immediate-denture care, then apply their own frequency limits.

Top reasons D5140 gets denied

1. Coded as conventional. D5120 was submitted for a same-day-of-extraction denture. The carrier cross-references the extraction dates and denies or requests a correction to D5140.
2. Missing tooth clause. The plan excludes prosthetics for teeth lost before the effective date. The current extractions make it less likely to apply, but confirm during verification because it is hard to reverse after delivery.
3. Frequency limit. Most plans allow one complete denture per arch every 5 to 10 years. A prior lower denture inside the window forces an appeal on clinical necessity.
4. No pre-authorization. Many plans require predetermination on major prosthodontics. Skipping it when required triggers a denial that is hard to appeal.
5. Reline billed inside the waiting period. The reline lands before the plan’s post-delivery window closes and denies as included. A timing issue, not a coding error.

Documentation that supports the claim

The claim needs:

• Date of service matching the delivery (same-day-of-extraction) date.
• Arch designation for the mandibular arch (most systems use area code 02 or a lower-arch indicator).
• The pre-extraction radiograph and treatment plan if the carrier requires proof the arch is being cleared.
• Your office fee, not the carrier allowable, so secondary-coverage coordination and write-off accounting stay correct.

In the patient record, document:

• The pre-extraction impression date.
• The lower teeth extracted at the delivery visit and their surgical codes.
• Delivery date and immediate post-op instructions.
• Material and shade.
• The mandibular ridge condition at delivery and the planned reline timeline, which supports the later reline claim.

Example case

A 61-year-old patient has failing lower teeth and wants to avoid any period without teeth. The dentist plans full clearance of the mandibular arch with an immediate complete lower denture and counsels the patient that the ridge will need a reline as it heals.

Billing steps:

1. Verify complete-denture coverage and the frequency rule, and ask about pre-authorization, the missing tooth clause, and the reline waiting period. Record the reference number.
2. Take pre-extraction impressions and send the case to the lab with the lower teeth marked for removal on the cast.
3. At the surgical visit, extract the remaining lower teeth, billing the D7140 or D7210 codes per tooth, and seat the denture.
4. Submit D5140 on the delivery date with arch designation 02, attaching the pre-op radiograph and any predetermination approval.
5. Bill post-delivery adjustments as D5411 per visit after the standard included period.
6. Plan the reline (D5731 or D5751) for when the ridge stabilizes, and confirm whether the plan covers it yet before scheduling.