D0240 Dental Code: Occlusal X-Ray Billing Guide

What D0240 covers

D0240 reports one intraoral occlusal radiograph. The film is larger than a periapical and sits flat against the biting surface, so the patient bites lightly to hold it while the beam comes from above or below. The result is a wide top-down image of an arch segment, the palate, or the floor of the mouth. It is the view a dentist reaches for when the diagnostic question is bigger than a single tooth but still needs intraoral detail: a suspected cyst or supernumerary tooth, an impacted canine in a child, a salivary stone in the floor of the mouth, or the extent of a jaw fracture.

The code is one image. If two occlusal films are taken, each is its own D0240 line.

It does not cover:

• A periapical image of one or two teeth. The first is D0220 and each additional is D0230.
• A bitewing showing the interproximal contacts of the back teeth. Those are D0270 (one), D0272 (two), D0273 (three), and D0274 (four).
• A complete intraoral series. That is D0210.
• A panoramic image of both arches. That is D0330.
• An extraoral film taken with the sensor outside the mouth. A 2D extraoral projection is D0250 and an extraoral posterior image is D0251.

When to bill D0240

Bill D0240 when the office takes an occlusal film for a specific diagnostic reason, and code one line per image taken.

Common situations:

• A pediatric patient where an occlusal view captures developing or supernumerary teeth that a periapical cannot frame.
• A suspected cyst, abscess, or bony lesion whose extent a periapical cannot show.
• Localization of an impacted or displaced tooth.
• A salivary calculus in the floor of the mouth.
• Trauma, to read the extent of a fracture in a segment of the arch.

Do not bill D0240 for:

• A film aimed at the root and apex of one tooth. That is D0220, then D0230 for each additional.
• Interproximal caries screening on the back teeth. Those are the bitewing codes.
• A full-mouth survey. Use D0210.

Occlusal versus periapical, bitewing, and the series

These codes are separated by the view they capture, not by film count, so keep the images in separate lanes:

• A periapical (D0220 first, D0230 each additional) is a small film that shows one or two teeth from crown to root apex plus the surrounding bone. It answers root-level questions.
• A bitewing (D0270 through D0274) shows the crowns and contact areas of the upper and lower back teeth in one view, for interproximal decay and crestal bone.
• An occlusal film (D0240) is a wide film on the biting plane that captures a broad top-down segment of an arch, the palate, or the floor of the mouth. It sees area a periapical cannot frame.
• A complete series (D0210) is a whole-mouth survey of periapical and bitewing images.
• A panoramic (D0330) is a single extraoral image of both arches.

The practical error is coding an occlusal film as a periapical, or the reverse, when the front desk reaches for a generic “X-ray” entry instead of matching the code to the image actually taken.

Top reasons D0240 gets denied

1. Annual radiograph benefit exhausted. Most plans cap radiographs by a dollar amount or a film count for the year, pooled across all image types. An occlusal film taken after a full series or a heavy same-day set can hit the cap and fall to patient responsibility. That is a benefit limitation, not a coding error.
2. No documented reason. Because occlusal films are uncommon, some plans want a narrative showing the diagnostic need. Without it, the carrier can read the film as routine and deny it, especially if a periapical of the same area is also on the claim.
3. Read as duplicative of a periapical. When a D0240 and a D0220 image overlapping teeth appear on the same date, some plans pay one and deny the other as the same information twice. A narrative separating the two diagnostic questions helps.
4. Remap to a complete series. When the total fee of the individual intraoral films on one date reaches the plan’s D0210 allowable, some carriers remap the group to a full series and pay the series rate, which can also consume the patient’s multi-year FMX frequency. This is a per-payer rule.

Documentation that supports the claim

The claim needs:

• Date of service matching the exposure date.
• The arch or region imaged, when the carrier asks.
• A short narrative naming the diagnostic reason for the occlusal view when the film is anything other than a routine, expected image.

For the patient record, document:

• Why an occlusal view was chosen over a periapical (the area or structure a periapical could not frame).
• The findings read off the film.
• Any treatment planning that depended on it.

An occlusal film with no charted reason looks like a screening image the plan will question. One line stating the clinical question is usually enough.

Example case

An eight-year-old presents for evaluation of a palatal swelling behind the upper front teeth. A periapical cannot frame the area, so the dentist takes a maxillary occlusal film and finds a supernumerary tooth (a mesiodens) and a small associated radiolucency.

Billing steps:

1. Verify the patient still has radiograph benefit for the year, since the cap pools across image types.
2. Code D0240 for the occlusal film on the same claim as the evaluation.
3. Add a one-line narrative: occlusal view taken to localize a suspected supernumerary tooth and assess the associated lesion, which a periapical could not frame.
4. Attach the image if the plan requests it or if a referral or surgical claim will reference it.

What to get right in your PMS

1. Keep D0240 a distinct, clearly labeled entry. A generic “X-ray” code is how an occlusal film gets billed as a periapical, or the reverse.
2. One line per occlusal image. D0240 is per image, not a set. Two occlusal films is two lines.
3. Attach a diagnostic narrative on non-routine films. Occlusal views are uncommon enough that naming the clinical question up front prevents a clarification request.
4. Check the running radiograph total against the plan’s annual cap and the FMX allowable. A large same-day set can exhaust the benefit or trigger a remap to a complete series.
5. Link the image to the specific claim line when the carrier asks for it, rather than leaving it at the patient level.