Dental frequency limitations explained
How often plans usually pay for cleanings, exams, X-rays and crowns, how to read a limit on the benefits page, and how to check it against the history.
Updated November 11, 2026
A frequency limitation caps how often the plan pays for the same service: two cleanings a year, one set of bitewings a year, one crown on a tooth every five years. A service past the limit pays nothing, so the patient owes the whole fee.
Typical limits
These are common, not universal. Every plan sets its own, so read the patient's benefits page. Figures from KYT Dental Services' guide to frequency limits, read November 11, 2026.
| Service | Often limited to |
|---|---|
| Cleanings | 2 a year, usually at least 6 months apart |
| Periodic exams | 2 a year |
| Comprehensive exam | 1 every 3 years per provider |
| Bitewing X-rays | 1 set a year; some plans every 6 to 12 months |
| Full-mouth or panoramic X-rays | 1 every 3 to 5 years |
| Periodontal maintenance | More often than cleanings, often every 3 to 4 months |
| Crown replacement | 1 per tooth every 5 to 7 years |
| Denture replacement | 1 every 5 to 7 years |
How the plan counts
- Per calendar year: the count starts again on January 1.
- Per benefit year: the count starts again on the plan's renewal date, which isn't always January 1.
- A number of months: “1 every 6 months” or “every 5 years” counts back from the last time the service was done, so a cleaning one day early can be denied even if it's only the second of the year.
- Per tooth: crowns and many other limits apply tooth by tooth, so a crown on another tooth doesn't count.
If the benefits page says “2 per year” without saying which year, ask the insurer.
Before the appointment
- Find the limit on the benefits page, under frequencies or limitations.
- Open the claims history and find the last date the service was paid, at any office. A history only shows what was billed to this plan.
- Count forward by the plan's rule. If the visit falls before the next allowed date, move it or tell the patient the fee is theirs.
- For anything unclear, call the insurer and write down who you spoke to, the date and the call reference.
How Tabruns checks it
Tabruns reads the limits from the benefits page and counts them against the claims history on the page, by service kind, on the office computer. If the limit is reached, that line pays nothing and says why. If it found the limit but not the history, it asks you to open the history page and press Read this page again. The details are in waiting periods, limits and missing teeth. To set it by hand on a line, use Does the plan pay it? and choose Frequency limit reached.
For everything else to check before treatment, see the insurance verification checklist. For the usual limits and denial reasons service by service, see the dental billing reference.
This is how frequency limits usually work. The patient's own plan documents and the insurer decide what's paid.
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