D0274 Dental Code: Four Bitewings Billing Guide

What D0274 covers

D0274 reports a set of four bitewings taken at one appointment, covering the premolars and molars on both sides. The films show the crowns of the upper and lower posterior teeth in occlusion. They are used to detect interproximal caries, check the margins of existing restorations, and screen bone levels for periodontal disease.

The code reports the whole four-film set as one procedure. Quantity is 1, not 4.

It does not cover:

• One, two, or three bitewings. Use D0270, D0272, or D0273 (see the next section).
• A vertical bitewing series of seven to eight images. Use D0277.
• Periapical radiographs. Use D0220 and D0230.
• A full mouth series. Use D0210.
• Panoramic films. Use D0330.

Bill D0274 when all four films are diagnostic quality, document the interproximal surfaces of the upper and lower posterior teeth, and the patient is past the plan’s bitewing frequency window.

When to use D0272 or D0273 instead

Bitewing codes are set by film count, and the code must match the films actually taken:

• D0270: one bitewing. Rare, typically a follow-up film on a specific area.
• D0272: two bitewings. Often used for patients with limited posterior dentition, or younger patients who only need coverage of the molar areas.
• D0273: three bitewings. Less common, sometimes used for specific anatomical needs.
• D0274: four bitewings. The standard adult series.

Patients with full posterior dentition almost always get D0274. Patients missing posterior teeth, with implant prostheses, or with other reasons for limited coverage may need only D0272 or D0273.

D0274 billed for a three-film series is rejected or downgraded. D0273 billed for a four-film series underbills the procedure.

The FMX bundling rule

D0210 (intraoral comprehensive series, FMX) is defined by full-mouth coverage of the crowns, roots, periapical and interproximal areas, and alveolar bone, not by a fixed number of films. CDT 2023 removed the old “14–22 periapical and bitewing images” language; the dentist decides the type and number of images. Because the series already captures the interproximal surfaces, carriers expect D0210 to be the only radiograph code on that date.

Billing D0274 with D0210 on the same date produces a bundling denial. The carrier either pays D0210 and denies D0274, or denies both pending clarification.

Top reasons D0274 gets denied

1. Frequency exceeded. The patient had bitewings inside the carrier’s frequency window, usually 12 months. Some plans count to the exact day; others allow flexibility around the anniversary.
2. Bundled with an FMX. D0210 and D0274 on the same date.
3. Annual radiograph cap reached. Other films have already used up the plan’s annual radiograph maximum.
4. Quantity 4. Billing D0274 as a per-film code is rejected. Quantity is 1.
5. Fewer than four films taken. The carrier may reprocess at the allowable for the lower-count code.

Carrier frequency patterns

Each plan sets its own bitewing frequency, and it can differ between groups at the same carrier:

• Once per 12 months is the most common pattern.
• Every six months shows up on some plans, sometimes only for patients documented as high caries risk.
• The reset basis varies. Some plans count to the exact day; others use the calendar or benefit year. Either way, the clock runs from the date of the last bitewings, not from the recall schedule.
• Federal and military plans can follow their own rules.

Confirm the interval and how it resets during verification rather than assuming a carrier-wide rule.

For new patients, the clock started when their last bitewings were taken at the previous office, not at their first visit with you. This is the usual cause of unexpected frequency denials. Ask the carrier for the last X-ray date on file during the verification call.

High caries risk patients

Some plans allow bitewings every six months instead of every twelve for patients flagged as high caries risk. The classification typically requires:

• Active caries within the past 12 months.
• Multiple restored surfaces.
• Documented risk factors, such as xerostomia from medications or radiation therapy, frequent snacking, poor oral hygiene, or orthodontic appliances.

Record the risk classification in the chart, ideally at the comprehensive evaluation, with the findings that support it. A note that only says “patient is high caries risk” usually doesn’t pass carrier review.

When billing bitewings at six months for a high-risk patient, attach a brief narrative with the risk classification and supporting findings. Without it, the carrier applies the standard 12-month rule and the claim denies on most plans.

Documentation that supports the claim

The claim needs the date of service and an indication that four bitewings were taken.

In the patient record, document:

• The clinical reason (routine caries screening, follow-up on a suspected interproximal lesion, periodic assessment).
• Findings on the films (caries detected, restoration margins evaluated, bone levels).
• Patient education and treatment planning based on the findings.

Radiograph documentation is light, but a brief note on what was seen and what was done matters for audit and continuity of care.

Example case

A 42-year-old patient presents for her six-month recall. Her last bitewings were taken 12 months ago at the previous recall. She has had two interproximal caries detected and restored in the past three years and is flagged as moderate caries risk.

Billing steps:

1. Verify benefits and confirm she is past the bitewing frequency window. Twelve months clears most plans.
2. The hygienist takes four bitewings at the start of the visit.
3. The dentist completes the periodic evaluation (D0120), reviews the bitewings, and notes a suspicious interproximal area on tooth #14 to monitor.
4. The hygienist completes the adult prophy (D1110).
5. Submit D0120, D0274, and D1110 on the date of service.
6. The carrier pays each per the plan’s benefits. D0274 typically pays at the preventive level.

If the carrier denies D0274 for frequency, check the date of the last bitewings in the patient’s claim history. If it falls inside the carrier’s lookback, which some plans calculate to the exact day rather than the recall anniversary, the patient owes for the films.