D6013 is the CDT code for placing a mini implant, a narrow fixture usually seated through the tissue to hold a denture steady.
- When to use: A fixture generally under about 3 mm in diameter is placed to stay in service as support for a removable denture.
- When not to use: A standard implant 3 mm or wider is D6010, a fixture planned for removal is D6012, and a one-piece mini needs no D6191 abutment line.
- Billing note: Some carriers deny minis that support a crown or bridge, so state in the narrative that the fixtures retain a full denture, and bill one line per fixture.
What D6013 covers
D6013 reports the surgical placement of one mini implant. A mini is a narrow-diameter fixture, most often one piece, usually driven straight through the tissue without raising a flap or preparing a full osteotomy. The retention head sits above the gum from day one, so a mini case has no submerged healing phase and no second surgical visit.
The code covers the fixture and the placement. It does not cover the attachment housings in the denture, the denture itself, a bone graft, or the imaging used to plan the case.
Two facts from the nomenclature shape the claim:
- It is per fixture. An arch stabilized with four minis in one appointment is four lines with four site numbers. A quantity of four on a single line reads as one implant to most clearinghouse edits.
- There is no second stage to bill. CareFirst’s implant policy states that a mini implant does not require a surgical flap and osteotomy, second-stage surgery, or a surgical stent. D6011 on a mini case is a coding error, not a coverage argument, and the no-stent language leaves little room for a D6190 radiographic/surgical implant index on the same case.
Carriers adjudicate what the mini implant is for. CareFirst states the indication plainly: mini implants retain full dentures that would otherwise be unstable, and they are not indicated to retain or support fixed partial dentures or crowns. Plans that follow that reasoning are not denying the surgery; they are denying the treatment plan around it.
D6010, D6012, D6013: three fixtures, two different axes
Axis one, the fixture. D6010 reports a standard endosteal implant body. D6013 reports a mini. CDT does not publish a millimeter cutoff, so the working line practices use is roughly 3 mm of fixture diameter. Zest publishes that line in its coding guide, putting narrow-diameter implants under 3.0 mm on D6013 and 3.0 mm or wider on D6010, and prosthodontist Michael Scherer’s LOCATOR coding guidance uses the same cutoff.
Axis two, permanence. D6012 reports an interim implant body placed to carry a transitional prosthesis while the definitive implants integrate, with the expectation that it comes out. D6013 reports a fixture that stays. Size has nothing to do with it. An interim fixture is D6012 even when it is narrow, and a narrow definitive fixture is D6013 even though it looks temporary on the radiograph.
In the PMS pick list, label D6013 by what it is, such as “mini implant, denture retention,” so it is not confused with D6010 or the interim code D6012.
The rarer placement codes sit on the fixture axis too. D6040 reports an eposteal implant, a framework that rests on the bone rather than in it, and D6050 reports a transosteal implant that passes through the jaw. Neither substitutes for a narrow endosteal fixture. The dental implant codes guide lists them with the zygomatic implant code and the guided-surgery index codes.
What to bill on a mini-implant denture case
Fees are usually lost on the retention hardware, not the surgical code. Building the case as one treatment plan (four D6013 lines, four D6192 lines, and the arch prosthesis code) keeps the housings from being forgotten.
- The fixtures. One D6013 per mini, each with a site number.
- The abutment, only if there is one. D6191 reports seating a semi-precision abutment on an implant body. A one-piece mini has no separate abutment, so the code has nothing to describe. Reserve it for a two-piece narrow implant that genuinely takes an attachment abutment.
- The housings. D6192 reports luting a semi-precision attachment into the removable prosthesis, per attachment, including the first nylon insert. Four minis with four housings picked up chairside is four D6192 lines.
- The prosthesis. A new definitive overdenture is D6110 for the maxillary arch or D6111 for the mandibular arch. Neither includes D6191 or D6192, so the attachment codes are billed alongside them. If a metal framework is processed into the denture, D5876 covers that addition per arch.
- The existing denture, if it is being kept. A retrofit runs under D5875 on plans that recognize it separately. On plans following CareFirst’s policy, the retrofit is already included in D6013.
- Later maintenance. D6091 reports changing a worn insert at a recall visit, per attachment. It is not billable at the same visit as D6192, which already includes the first insert. Both look like “attachment” in a PMS search, so label them apart: D6192 is the housing at delivery, D6091 the insert swap at recall. Recall visits where the whole prosthesis comes off for cleaning are D6280, the full-arch removable maintenance code added for 2026, billed per arch.
Coverage and how carriers treat it
Every rule below is plan-dependent. The fee is meaningful to the patient and the exclusions are specific, so mini-implant cases warrant a pre-treatment estimate.
Whether implants are covered at all. A plan with no implant benefit denies D6013 categorically, and no narrative changes that. Where implants are covered, the missing-tooth clause still applies to the site.
What the implant is supporting. This exclusion is specific to minis and follows the CareFirst indication above. If the chart describes a mini under a single crown, expect a denial that quotes the indication rather than the benefit.
Sedation. CareFirst’s implant policy says general anesthesia and IV sedation may be covered with D6010, D6040, and D6050, and states they are not covered with D6013. A sedation line can pay on one implant case and deny on the next because the fixture was narrow, so raise the question at scheduling, not after the EOB posts.
Removal soon after placement. Northeast Delta Dental covers implant removal under D6105 once in a lifetime. It denies removal when a different office removes an implant within six months of a D6010 or D6013 placement, and states it is not billable to the patient when the same office removes it inside that window. On plans following that policy, a mini that fails early is a write-off, not a patient balance.
Documentation that supports the claim
CareFirst requires clinical review on D6013 and recommends a pre-treatment estimate. Reviewers check whether a mini was the right choice, not whether the surgery happened.
- Why a mini instead of a standard implant. Ridge width and height measurements, the bone quality finding, and any medical or financial factor that ruled out grafting. This narrative resolves the most reviews.
- What the fixtures are supporting. Name the prosthesis: a full denture being stabilized, or an existing denture being retrofitted.
- Radiographs. A pre-operative panoramic or full-mouth series, plus periapicals showing each fixture at full length.
- Fixture detail. Manufacturer, model, diameter, and length in the chart. Diameter is what supports D6013 over D6010 if the code is questioned.
- Extraction dates for the sites. The missing-tooth clause applies to mini implants the same way it applies to any implant.
For how site numbers, quantities, and the remarks field are filled in on the claim itself, see the ADA dental claim form guide.
FAQs
- What is the dental code for a mini implant?
- D6013, surgical placement of a mini implant. It reports the fixture only. A typical case places four minis in the lower front and generates four D6013 lines, each with its own site number, plus separate codes for whatever holds the denture onto them. The nomenclature names no millimeter cutoff, but the working industry line is about 3 mm of fixture diameter: narrower is generally D6013, and 3 mm or wider is generally D6010.
- What is the difference between D6013 and D6010?
- The fixture, not the surgery. D6010 reports a standard endosteal implant body, the two-piece screw that gets a separate abutment and then a crown. D6013 reports a mini, a narrow one-piece fixture that usually goes in through the tissue without a flap or formal osteotomy and carries its retention head above the gum. Zest, which makes the LOCATOR attachment system, draws the line in its coding guide at 3.0 mm: narrower bills as D6013, 3.0 mm or wider as D6010. Because the cases differ, the codes that follow differ too.
- Is a mini implant the same as an interim implant, D6012?
- No. D6012 reports an interim implant body placed to carry a transitional prosthesis while the definitive implants integrate, and it is meant to come out. D6013 reports a fixture that stays. The axis is permanence, not size: a narrow fixture placed as the final restoration is D6013, and a fixture placed to be removed later is D6012 even at the same diameter. This swap produces the most misreported mini-implant claims, and because many plans treat D6012 as included in the definitive placement, it usually costs the practice the whole line.
- Do we bill an abutment code with D6013?
- Usually not. Most mini implants are one-piece, with the attachment head machined onto the fixture, so there is no separate component for D6191 (semi-precision abutment placement) to report. Bill D6192, semi-precision attachment placement, for each housing luted into the denture, including its first nylon insert. D6191 applies only to a two-piece narrow implant that genuinely takes a separate attachment abutment.
- Does D6013 include modifying the patient's existing denture?
- It depends on the carrier, so check before quoting the patient a fee. CareFirst's implant policy states that D6013 includes retrofitting an existing prosthesis, so the modification is not separately payable under that policy. Other plans process a retrofit under D5875, modification of a removable prosthesis following implant surgery, though D5875 is commonly excluded unless the plan carries an implant rider. If the denture is replaced rather than modified, the new implant-retained prosthesis is D6110 for the upper arch or D6111 for the lower.
- Why did the plan deny D6013 when it covers implants?
- Usually because the plan excludes implants outright, the missing-tooth clause blocks the site, or the case was documented as supporting a crown or a bridge, which carriers such as CareFirst publish as outside what a mini implant is for. Read the denial before appealing. Sedation is a separate issue: CareFirst's implant policy says general anesthesia and IV sedation may be covered with D6010 and are not covered with D6013, so a sedation line that paid on a standard implant case can deny on a mini case. All of this is plan-dependent, which is why mini-implant cases warrant a pre-treatment estimate.
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CDT codes are maintained by the American Dental Association. This page is an editorial billing guide, not the official ADA code descriptor. Verify current coverage policies with each carrier before submitting claims.