The 5 most common dental claim denials

Denials feel random when you're on the receiving end. They aren't. Across practices, the same five reasons account for the large majority of what comes back.

1. Missing or insufficient documentation

Perio charting, pre-op x-rays, and clinical narratives are the usual gaps. If a procedure requires supporting documentation, that requirement doesn't change based on how obvious the need looks clinically.

2. Frequency limitations

Two cleanings a year, one set of bitewings, a crown replacement clock that hasn't run out yet. Verifying frequency limits during insurance verification prevents the denial entirely.

3. Waiting periods and eligibility

A patient who just started coverage may not be eligible for major services yet. This one stings because the work is already done.

4. Coding mismatches

The narrative describes one procedure and the CDT code says another. Or a code was correct last year and the definition changed. Codes move; staying current matters.

5. Missing tooth clause and pre-existing conditions

Common on bridges and implants, and one of the more appealable categories when clinical necessity is well documented.

The pattern worth noticing

Four of these five are preventable at verification or submission. Only one is genuinely a fight after the fact. If your denial rate is high, the fix usually lives upstream of the denial, not downstream of it.