The Most Commonly Audited Dental Codes by Commercial and Government Payors

By Duane Tinker – The Toothcop

Dental Compliance Consultant | Former Investigator | Defender of Ethical Dentistry

Why Certain Codes Trigger Audits—and What You Can Do About It

Let’s talk about dental codes—the kind that keep payors watching and dentists sweating.

Some CDT codes are magnets for audits.

Why? Because they’re high-dollar, often misunderstood, and frequently misused.

I’m Duane Tinker, The Toothcop. I’ve worked both sides of the fence—as an investigator and a compliance consultant. I’ve seen how certain codes get flagged over and over by Medicaid, commercial insurers, and third-party administrators.

If you don’t know which codes are risky—and how to document them—you’re setting yourself up for claims denials, payment recoupments, or worse: a full-blown investigation.

Let’s dig into the most commonly audited dental codes, why they raise red flags, and how to protect your practice.

Top Audited Dental Codes (Government and Commercial Payors)

Here’s a list of CDT codes that consistently appear in audits from Medicaid, Medicare Advantage, and private insurers:

Why These Codes Are Risky

•        High Dollar = High Scrutiny

o   Procedures like crowns, SRPs, and core build-ups represent big reimbursements. Payors want to make sure they’re legitimate.

•        Documentation Gaps

o   Even if the service was necessary, poor or missing clinical documentation will make it look fraudulent.

•        Frequency and Pattern

o   If you bill D4341 on 70% of hygiene patients, that’s a red flag. So is D2740 for nearly every posterior restoration.

•        Bundling Errors

o   Some codes (like D2950 with D2740) are often bundled, but practices unbundle them to increase reimbursement.

Top 5 Mistakes That Lead to Audits

1.      Lack of Radiographs or Perio Charting

a.      If you’re billing SRP without full perio data and bitewings or FMX, expect an audit letter.

2.      Copy/Paste SOAP Notes

a.      Identical documentation across patients triggers suspicion—especially if it doesn’t match clinical findings.

3.      Unjustified “Routine” Use

a.      Using D0210 every new patient? Or D2740 for every molar? That’s not “routine” to auditors.

4.      Billing Before Performing Services

a.      Submitting claims before finalizing treatment, especially in Medicaid, violates payer policy.

5.      Using D9999 as a Shortcut

a.      If you can’t explain it with another CDT code, and can’t document it clearly—don’t bill it.

How to Stay Audit-Resistant

1. Document Like an Auditor Is Watching

For every audited code, your documentation should clearly show:

•        Clinical diagnosis

•        Justification for treatment

•        Radiographic and perio data

•        Provider signatures

2. Train Your Team (Front and Back Office)

Billing teams need to know why documentation matters, not just what to code.

3. Audit Yourself Before They Do

Pull 10–15 charts per quarter. Check the top risk codes. Review documentation and billing alignment. No time? Outsource record auditing.

4. Watch Your Coding Trends

Your EHR/PMS can generate reports. Know your most-billed codes and how they compare to peers.

5. Create a Code Documentation Checklist

Especially for high-risk codes like D4341, D2950, and D4910.

The Toothcop’s Take

The best way to avoid an audit is to act like you’re always under one.

Because you are.

Algorithms and payor review systems are watching for unusual patterns—often using nationwide data.

Your goal isn’t to be perfect. It’s to be accurate, transparent, and prepared.

So take this list, train your team, review your charts, and clean up your documentation.

Your license—and your peace of mind—are worth it.

Stay sharp,

Duane Tinker – The Toothcop