What D0274 means

D0274 covers bitewings — four radiographic images. "D" is dental, "02" is the diagnostic imaging group, and "74" is this four-image bitewing set. A bitewing X-ray shows the crowns of the upper and lower back teeth together in one image (you bite on a tab, hence 'bitewing'). It's specifically good at revealing decay between teeth and the bone level around them — things a visual exam can't see. The four-image set captures all the back teeth (both sides, premolars and molars).

Bitewings are a routine, preventive diagnostic tool, typically taken at checkups to catch cavities early between teeth before they're visible or painful, and to monitor bone levels for early gum disease.

The bitewing codes differ by number of images: D0270 (one), D0272 (two), D0273 (three), and D0274 (four). The four-image set (D0274) is standard for adults and older children with a full set of back teeth, where fewer images wouldn't cover everything. Most insurance plans cover bitewings about once a year. They're distinct from periapical images (which show full tooth roots) and a full-mouth series.

When it's typically used

D0274 is reported when four bitewing X-rays are taken — typically at a routine checkup for an adult or older child with a full set of back teeth — to detect cavities between teeth and check bone levels for early gum disease.

How much does D0274 cost?

A four-image bitewing set is a low-cost diagnostic service, often roughly 50 to 120 USD depending on region. It's a routine part of preventive checkups, often bundled into the cost of a regular visit.

Is D0274 covered by insurance?

Commonly covered under diagnostic/preventive benefits, often at or near 100 percent, but typically limited to once per year (some plans every 6–18 months based on caries risk). Taking them more often than the plan allows means the extra set may be out of pocket. Routine annual bitewings are a standard covered benefit.

What bitewing X-rays detect

Bitewing X-rays are the workhorse of routine dental diagnostics, and understanding what they reveal explains why they're taken regularly.

A bitewing captures the crowns of the upper and lower back teeth together. Its main job is detecting cavities between teeth (interproximal decay) — the spots where teeth touch their neighbors, which are impossible to see directly and where a probe can't always reach. Catching this decay early, while it's small, allows a simple filling before it grows into something needing a root canal or crown. Bitewings also show the bone level around the back teeth, revealing early bone loss from gum disease, and can detect decay under existing fillings, tartar buildup below the gumline, and other hidden problems.

This below-the-surface, between-the-teeth view is exactly what a visual exam misses, which is why bitewings are a cornerstone of preventive care. Many cavities are found on bitewings long before they'd cause symptoms — and early detection means simpler, cheaper treatment. That's the core value: spotting problems while they're small and easily fixed, rather than waiting until they hurt.

How many bitewings, and how often?

The number of bitewings taken and how frequently depends on the patient, and there's clinical reasoning behind the standard practices.

The number of images relates to how many back teeth there are to cover. A four-image set (D0274) is standard for adults and older children with a full complement of back teeth, since fewer images wouldn't capture all the contact points. Younger children with fewer or smaller teeth may need only two (D0272). As for frequency, professional guidelines tie it to cavity risk: a low-risk patient with healthy teeth might have bitewings every 18–24 months, while someone at higher risk for decay might need them every 6–12 months to catch problems early. Most insurance plans cover them about once a year.

This risk-based approach balances the value of early detection against minimizing X-ray exposure — taking them often enough to catch problems but not more than needed. Your dentist recommends an interval based on your decay history, current oral health, and risk factors. So while annual bitewings are common, the right frequency is individualized, which is also why a low-risk patient may be advised to space them out further.

Bitewings vs other dental X-rays

Bitewings are one of several X-ray types, and knowing how they differ clarifies why each is used for different purposes.

Bitewings (D0274) show the crowns of the back teeth, upper and lower together, and excel at finding decay between teeth and checking bone levels — ideal for routine checkups. Periapical X-rays (D0220) show the full length of a tooth including the root and surrounding bone, used to diagnose a specific tooth's problem like a root infection. A panoramic X-ray (D0330) shows the whole mouth in one broad image — all teeth, both jaws, sinuses, and jaw joints — good for an overview, wisdom teeth, and jaw issues. A full-mouth series (D0210) combines many individual images for a comprehensive detailed picture.

Each answers a different question. For routine cavity-checking at a cleaning, bitewings are the go-to. For investigating a painful tooth, a periapical. For a big-picture view or wisdom teeth, a panoramic. For a thorough new-patient or comprehensive workup, a full series. Dentists choose based on what they need to see, which is why you get bitewings routinely but other types in specific situations. They complement rather than replace each other.

Are routine bitewings worth the radiation?

Some patients wonder whether routine X-rays are necessary or worth the radiation exposure, which is a reasonable question worth addressing honestly.

The radiation dose from bitewing X-rays is very low — a small fraction of the natural background radiation everyone is exposed to in daily life, and reduced even further with modern digital sensors. Dentists also use protective measures like lead aprons and thyroid collars and follow guidelines to take X-rays based on need rather than rigidly on a schedule. The principle is that X-rays are taken when the diagnostic benefit outweighs the very small risk.

For bitewings specifically, that benefit is significant: they routinely catch cavities and bone loss early, when treatment is simple and inexpensive, preventing problems that would otherwise grow undetected into painful, costly issues. For most patients, periodic bitewings are a low-risk, high-value part of preventive care. That said, the frequency should match your individual risk — a low-risk patient with a healthy mouth can reasonably space them out. If you have concerns (for instance during pregnancy), it's always appropriate to discuss timing with your dentist, who can adjust accordingly while still ensuring problems aren't missed.

Frequently asked questions

What is the D0274 dental code?

It's a set of four bitewing X-rays — routine checkup X-rays that detect cavities between the back teeth and check bone levels, covering all the back teeth in adults and older children.

What do bitewing X-rays detect?

Cavities between teeth (which can't be seen directly), bone loss from early gum disease, decay under existing fillings, and tartar below the gumline — problems a visual exam misses.

How often should bitewings be taken?

Based on cavity risk — roughly every 18–24 months for low-risk patients, every 6–12 months for higher-risk ones. Most insurance plans cover them about once a year.

How much does a set of bitewings cost?

Often around 50 to 120 USD for four images, a routine part of preventive checkups, frequently bundled into a regular visit.

What's the difference between bitewings and other X-rays?

Bitewings show the crowns of back teeth for cavity-checking. Periapicals show full tooth roots for diagnosing a specific tooth; panoramics show the whole mouth in one image.

Are routine bitewings safe?

Yes — the radiation dose is very low, especially with digital sensors. They're taken when the benefit (catching cavities early) outweighs the small risk, at intervals matched to your risk.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.