What is the dental code for a CBCT of the upper jaw?

D0366, when the scan covers one full maxillary arch and the same provider both captures and interprets it. The neighboring codes split on how much anatomy the volume takes in. D0364 is a limited view of less than one whole jaw. D0365 is the same full-arch scan on the mandible. D0367 is both jaws in one volume. If the office captures the scan and sends it out to be read, the maxillary capture is D0382 and the reading practitioner reports D0391 for the interpretation and report.

What does with or without cranium mean on D0366?

It means cranial anatomy in the scan volume does not change the code. D0366 covers one full maxillary arch whether or not the field of view extends up past the jaw into skull structures. Because the maxilla sits directly under the sinuses and the nasal floor, a full upper arch scan often catches that anatomy no matter how the field is set, and the nomenclature is written so nobody has to code around it. Catching cranial structures is not a reason to move up to D0367. Coverage of the second arch is the only thing that does that.

Should a CBCT for a sinus lift be billed to medical or dental?

It depends on the indication that actually drove the scan, and the two cases pull in opposite directions. Sinus pathology, oroantral communication, trauma, and non-dental pathology are the indications medical plans commonly recognize. Implant planning is commonly excluded as dental in nature, and residual bone height before a posterior implant is the paradigm case that exclusion is written to catch. A scan can serve both purposes, but the indication on the claim has to be the real reason it was taken, not the label most likely to get it paid. Medical claims do not use the CDT code. They use a CPT code for the imaging, an ICD-10 diagnosis establishing the indication, and a narrative supporting necessity, submitted on the medical claim form. Verify the medical plan's own policy before you assume it pays, since coverage for cone beam imaging varies as much on the medical side as it does on the dental side.

What is the difference between D0366 and D0382?

Who reads the scan. D0366 bundles the maxillary capture and the interpretation into one line, which is right when your provider takes the scan and writes the report. D0382 reports the capture alone, used when the office takes the scan and a different practitioner interprets it, usually an oral and maxillofacial radiologist who then bills D0391 for the read and the report. The two do not go on the same claim for the same scan. Reporting D0366 when an outside radiologist actually interpreted the volume bills the read twice across two providers, and that is the pattern an audit picks up.

Does dental insurance cover D0366?

Coverage is inconsistent and worth checking scan by scan. Some plans carry no cone beam benefit at all. Plans that do cover it commonly separate a limited scan from a full-arch or larger one, and frequency windows vary by plan and can run 12 months or longer. Most also want a narrative explaining why a flat image would not answer the clinical question. On elective cases, run a predetermination before the scan rather than after, and check whether the patient's medical plan is the better route when the indication is sinus disease, pathology, or trauma.

Is D0366 still an active CDT code in 2026?

Yes. D0366 is active in CDT 2026 and was not among that year's deletions, which were D1352, D9248, and four discontinued COVID-19 vaccine administration codes. The whole cone beam block came through intact: D0364 through D0368 on the capture-and-interpretation side, D0380 through D0384 on the capture-only side, and D0391 for an interpretation by a practitioner who did not capture the image. The block has been reworked in earlier CDT cycles, so confirm against the current year rather than an old cheat sheet taped inside a cabinet door.

D0366 Dental Code: Maxillary CBCT Scan Billing

D0366 is the CDT code for a cone beam CT covering one full upper dental arch, the maxilla, captured and interpreted by the same provider, with or without cranial structures in the volume.

Billers read the cranium clause as a size rule and code up whenever the volume catches skull. Coverage across the dental arch is what picks the code, so cranial anatomy riding along in the scan does not change it. The clause is worth attention for a different reason. A maxillary scan taken for sinus disease or pathology often belongs on a medical claim, where the code set, the claim form, and the necessity standard all work differently from the dental side.

On this page

What D0366 covers
The cranium clause, and what it does not do
Why the maxilla is the arch that reaches
The medical claim question
Why D0366 gets denied
When to bill D0366, and when not to
Documentation that supports the claim
What to get right in your PMS
FAQs

What D0366 covers

D0366 reports a cone beam CT whose field of view takes in one complete upper dental arch, where the same provider captures the volume and interprets it. The line pays for the 3D acquisition, the reconstruction, the diagnostic read, and the written report.

Its place in the family is set by coverage. D0364 is a focused volume smaller than one jaw, D0365 is the full lower arch, D0366 is the full upper arch, and D0367 is both jaws at once. D0365 walks through how to read a field of view off the machine and match it to a code, so this page stays on what is specific to the maxilla.

The cranium clause, and what it does not do

Among the capture-and-interpretation codes, D0366 is the only single-arch code carrying the “with or without cranium” language. Its lower-arch twin does not, and the reason is anatomy. The maxilla is the floor of the face. Above the upper back teeth sit the maxillary sinuses, and above the upper front teeth sit the nasal floor and the anterior nasal spine. A field of view tall enough to include the whole upper arch and its root apices very often picks up some of that, and on many machines the operator has no practical way to exclude it.

So the nomenclature allows for it. Cranial anatomy in the volume is incidental to the code.

The same clause appears on the capture-only maxillary code, D0382, for the same reason. Nothing about it is a coverage promise or a hint that the scan is a bigger service. It is a drafting convenience.

Why the maxilla is the arch that reaches

The clinical reasons a practice orders a full upper arch scan cluster around structures that a lower arch scan never has to deal with. Three come up constantly:

Sinus assessment before grafting or a posterior implant. The bone height between the crest and the sinus floor decides whether an implant goes in directly, whether a lateral window graft is needed (D7951), or whether a vertical approach through the osteotomy is enough (D7952). A flat film compresses that measurement into a projection you cannot trust. The scan also shows membrane thickening, retention cysts, and existing sinus disease that would change or delay the plan.
Locating an impacted canine. Upper canines impact far more often than lower ones, and the question is whether the crown sits toward the palate or toward the cheek, and whether it is resorbing the lateral incisor root next to it. That is a three-dimensional question, and it usually precedes an exposure (D7280) or an eruption device (D7283).
Pathology at or through the sinus floor. A periapical lesion on an upper molar that looks like it is communicating with the sinus, a suspected oroantral fistula, or a radiolucency of uncertain origin near the antrum all need a volume covering both the tooth and the space above it.

Each of these is a legitimate reason to reach upward, and each is also the kind of indication a medical plan recognizes.

The medical claim question

This is the practical fork on D0366, and it exists because the anatomy that makes the maxillary field reach is the same anatomy medical plans recognize. When the indication is sinus pathology, an oroantral communication, trauma, or other non-dental pathology, the patient’s medical plan is often a better route than the dental imaging benefit, and sometimes it is the only route, because plenty of dental plans exclude cone beam imaging outright. Implant and graft planning is the weaker case on the medical side, since medical plans commonly exclude services related to the care of the teeth unless the need arose from trauma or non-dental disease. Either way the indication recorded on the claim has to be the reason the scan was taken.

How the medical side works, including which CPT codes are in play and why none of them is specific to cone beam, the ICD-10 requirement, and the authorization workflow, is in the CBCT billing guide.

Why D0366 gets denied

One denial pattern belongs to this code. A maxillary volume that reached into sinus and nasal anatomy goes out as D0367 because it looked large on screen, and the second arch is not there when a reviewer opens the reconstruction.

The rest of what denies a maxillary scan denies any cone beam scan: no cone beam benefit in the plan, a frequency window that holds full-arch volumes to a long cycle, a claim submitted without a narrative explaining what a 2D image could not answer, and bundling against a panoramic reconstructed from the same acquisition. Those are in the CBCT billing guide under coverage, necessity, and frequency and the same-acquisition panoramic.

When to bill D0366, and when not to

Bill D0366 when your office captures a cone beam volume covering the full upper arch and your provider interprets it and writes the report.

Do not bill D0366 for:

A lower-arch scan (D0365), a sub-arch volume (D0364), or a both-arches volume (D0367), whichever arch the clinical question was about.
A dedicated TMJ series of two or more exposures, which is D0368.
A scan your office captured and an outside radiologist read. The capture is D0382 and the read is D0391.
A panoramic image, which is D0330, or maxillofacial MRI, which is D0369.

Documentation that supports the claim

Two documentation facts belong to D0366 specifically. The imaging note has to say the volume covered the full upper arch, because that line is what separates this code from an undercoded D0364 below it and an overcoded D0367 above it. And when the field caught the sinuses, the interpretation report should say what they looked like, since incidental sinus findings are the most common thing a maxillary volume turns up beyond the question it was taken to answer. State the clinical question in maxillary anatomy while you are there. “Residual crestal bone height and sinus floor position at sites 3 and 4 prior to graft” tells a reviewer why a flat film would not do. “Implant planning” does not.

The rest of what a cone beam claim needs in the record is in the CBCT billing guide.

What to get right in your PMS

The setup item specific to this code is the label. D0366 and its capture-only twin D0382 should both read as upper arch in the procedure list, so a poster working from a generic cone beam entry cannot land on the lower-arch code by habit. The rest of the cone beam setup, including the benefit flag before the exposure and where to keep the cross-coding map, is in the CBCT billing guide.

FAQs

What is the dental code for a CBCT of the upper jaw?: D0366, when the scan covers one full maxillary arch and the same provider both captures and interprets it. The neighboring codes split on how much anatomy the volume takes in. D0364 is a limited view of less than one whole jaw. D0365 is the same full-arch scan on the mandible. D0367 is both jaws in one volume. If the office captures the scan and sends it out to be read, the maxillary capture is D0382 and the reading practitioner reports D0391 for the interpretation and report.
What does with or without cranium mean on D0366?: It means cranial anatomy in the scan volume does not change the code. D0366 covers one full maxillary arch whether or not the field of view extends up past the jaw into skull structures. Because the maxilla sits directly under the sinuses and the nasal floor, a full upper arch scan often catches that anatomy no matter how the field is set, and the nomenclature is written so nobody has to code around it. Catching cranial structures is not a reason to move up to D0367. Coverage of the second arch is the only thing that does that.
Should a CBCT for a sinus lift be billed to medical or dental?: It depends on the indication that actually drove the scan, and the two cases pull in opposite directions. Sinus pathology, oroantral communication, trauma, and non-dental pathology are the indications medical plans commonly recognize. Implant planning is commonly excluded as dental in nature, and residual bone height before a posterior implant is the paradigm case that exclusion is written to catch. A scan can serve both purposes, but the indication on the claim has to be the real reason it was taken, not the label most likely to get it paid. Medical claims do not use the CDT code. They use a CPT code for the imaging, an ICD-10 diagnosis establishing the indication, and a narrative supporting necessity, submitted on the medical claim form. Verify the medical plan's own policy before you assume it pays, since coverage for cone beam imaging varies as much on the medical side as it does on the dental side.
What is the difference between D0366 and D0382?: Who reads the scan. D0366 bundles the maxillary capture and the interpretation into one line, which is right when your provider takes the scan and writes the report. D0382 reports the capture alone, used when the office takes the scan and a different practitioner interprets it, usually an oral and maxillofacial radiologist who then bills D0391 for the read and the report. The two do not go on the same claim for the same scan. Reporting D0366 when an outside radiologist actually interpreted the volume bills the read twice across two providers, and that is the pattern an audit picks up.
Does dental insurance cover D0366?: Coverage is inconsistent and worth checking scan by scan. Some plans carry no cone beam benefit at all. Plans that do cover it commonly separate a limited scan from a full-arch or larger one, and frequency windows vary by plan and can run 12 months or longer. Most also want a narrative explaining why a flat image would not answer the clinical question. On elective cases, run a predetermination before the scan rather than after, and check whether the patient's medical plan is the better route when the indication is sinus disease, pathology, or trauma.
Is D0366 still an active CDT code in 2026?: Yes. D0366 is active in CDT 2026 and was not among that year's deletions, which were D1352, D9248, and four discontinued COVID-19 vaccine administration codes. The whole cone beam block came through intact: D0364 through D0368 on the capture-and-interpretation side, D0380 through D0384 on the capture-only side, and D0391 for an interpretation by a practitioner who did not capture the image. The block has been reworked in earlier CDT cycles, so confirm against the current year rather than an old cheat sheet taped inside a cabinet door.

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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.