D0220 Dental Code: First Periapical X-ray Billing Guide

What D0220 covers

D0220 reports the first intraoral periapical radiograph taken at an appointment. A periapical (PA) film shows one tooth, sometimes two, including the entire root and the surrounding bone to the apex. The first PA taken and the fifth PA taken at the same visit are the same procedure clinically; the first-versus-additional split is purely billing structure.

It does not cover:

• Additional PAs at the same visit. Use D0230 for each additional.
• Bitewing radiographs. Use D0270 (one), D0272 (two), D0273 (three), or D0274 (four).
• A complete intraoral radiographic series (FMX). Use D0210.
• Panoramic radiographs. Use D0330.
• Occlusal radiographs. Use D0240.
• Cephalometric or other extraoral imaging.
• Radiographs reviewed but not taken at this visit.

The D0220 plus D0230 series logic

When the dentist takes more than one PA at a visit:

• The first PA is D0220, quantity 1. D0220 is per visit, not per film, so its quantity is always 1.
• Each additional PA is D0230. If three more PAs were taken, bill D0230 quantity 3.

Example: a new adult patient gets four bitewings and three PAs at the first visit. The billing is:

• D0274 quantity 1 (four bitewings)
• D0220 quantity 1 (first PA)
• D0230 quantity 2 (two additional PAs)

The first-and-additional structure is a holdover from when the first film at a visit carried a higher allowable than later films. Modern allowables on D0220 and D0230 are often the same, but the coding structure persists.

When PAs bundle with FMX

The most common billing mistake on D0220 is billing it with D0210 (full mouth series) on the same date. Carriers typically bundle individual PAs into the FMX when both appear on the same claim.

If selected PAs were taken without a full series, bill D0220 plus D0230 with the appropriate quantity. The carrier pays each film up to the plan’s annual radiograph limit.

A common failure: the dentist takes a full mouth series at a new patient’s first visit, but the clearinghouse software or a billing assistant lists each PA as a separate line. The claim shows D0210 plus D0220 plus D0230 quantity 12 or similar. The carrier reads this as duplicate billing and either denies the individual films or pays only D0210 and writes off the rest. If your office sees recurring D0220 bundling denials, the cause is almost always this workflow. Fix it at the procedure-code template level so an FMX bills as D0210 only, rather than correcting each claim by hand.

How D0220 works with bitewings

PAs and bitewings serve different diagnostic purposes (apical pathology versus interproximal caries) and bill separately. A new patient might get four bitewings (D0274) plus two PAs on specific teeth (D0220 plus D0230 quantity 1), each on its own line. The total film count should match the clinical need documented in the chart. Carriers flag excessive radiographs without justification, especially on patients with recent X-rays at another office.

Watch the cumulative fee. Most carriers apply a “remap to complete series” rule: when the total fee of the individually billed intraoral films (PAs plus bitewings) on one date of service meets or exceeds the plan’s D0210 (FMX) allowable, the payer generally remaps the films to a complete series and pays the FMX rate. That consumes the patient’s once-per-3-to-5-year FMX frequency and can block a later FMX or panoramic within the window.

A new patient who gets four bitewings plus several selected PAs is a common trigger. The rule is per-payer, not universal, but it is common enough that you should check the cumulative fee against the FMX allowable before billing the individual films, and set the patient’s expectations accordingly.

Top reasons D0220 gets denied

1. Bundled with FMX on the same date. Bill D0210 only when a full series is taken.
2. Radiograph limit reached. The patient hit the plan’s annual radiograph dollar limit or film-count limit, and additional films deny for frequency.
3. No diagnostic justification. Some plans require chart documentation of why the PA was taken (a specific symptom, suspected pathology, or treatment planning need). A PA on a healthy patient with no chief complaint may pend for clarification.
4. D0220 billed with quantity greater than 1. The first PA at a visit is one D0220 regardless of how many PAs follow. A claim with D0220 quantity 5 will be rejected or downgraded.

Documentation that supports the claim

The claim needs the date of service, the tooth or teeth imaged (for some carriers), and the diagnostic reason if a narrative is requested.

In the patient record, document:

• The clinical reason for the PA (specific symptom, suspected pathology, periodontal assessment, treatment planning).
• The tooth or teeth imaged.
• Findings on the radiograph.

A diagnostic PA without a documented reason looks like a routine screening film. The chart note should say why this particular film was needed.

Frequency limits

Most plans cap the total radiograph benefit by dollar amount per year (often $50 to $150) or by film count, with type-specific rules on top: one FMX per 3 to 5 years, four bitewings per year, and individual PAs up to a cap. Once a patient hits the cap mid-year, additional films are patient responsibility. That is a benefit limitation, not a coding error. When a patient asks why a single PA isn’t covered under a plan with “X-ray coverage,” the answer is that the X-ray category has its own internal limits, and they have been reached.

Example case

A 35-year-old patient presents with sharp pain on chewing on tooth #19. The dentist suspects a cracked tooth and takes a single PA to evaluate the root and surrounding bone.

Billing steps:

1. Verify the patient has X-ray benefits remaining in the current benefit year.
2. Submit D0140 (limited oral evaluation for the problem-focused exam) and D0220 quantity 1 on the same date of service.
3. The carrier pays each per the plan’s benefits. D0140 typically pays under diagnostic, and D0220 under the radiograph benefit.
4. If the carrier denies D0220 for frequency, check the patient’s recent X-ray history. Radiographs at a previous office within the benefit year may have consumed the cap.

If the PA reveals findings that warrant a second PA on an adjacent tooth at the same visit, billing becomes D0140 plus D0220 quantity 1 plus D0230 quantity 1.