D0120 is the CDT code for a periodic oral evaluation of an established patient — the routine recall exam, typically performed at a checkup or hygiene visit. It covers the dentist's evaluation of an established patient to monitor oral health, detect new problems, and review any changes since the last visit.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D0120 Code
Use D0120 for an established patient returning for a periodic (recall) evaluation — most often paired with a cleaning and radiographs at a six-month checkup. It's the everyday recall exam that keeps a patient's care on track.
Choose the right evaluation code for the situation: a new patient (or one who hasn't been seen for a while, per the plan) usually warrants the comprehensive evaluation D0150; a problem-focused visit for a specific complaint is D0140 (limited evaluation). D0120 is specifically the periodic evaluation of someone already established with the practice, so coding a new patient as D0120 — or a problem visit as D0120 — is a common error.
Documentation & Clinical Scenarios
The exam is routine, but the record still needs to show a real evaluation occurred:
- The date and that the patient is established (prior visit history in the chart).
- Evaluation findings — periodontal status, soft-tissue and oral-cancer screening, any new caries or concerns, and changes since the last visit.
- The provider who performed the evaluation (the dentist, not the hygienist alone).
- Any other services delivered the same day (cleaning, radiographs) documented under their own codes.
Because D0120 is bundled into a typical recall visit, the chart should clearly distinguish the doctor's evaluation from the hygiene services performed at the same appointment.
Insurance & Billing Tips
- Know the frequency limit. Most plans cover two oral evaluations per benefit year (often one per six months); a third in the same year is commonly denied. Track the patient's exam history to time it correctly.
- Use the right code for the visit type. A new patient should generally be billed D0150, not D0120 — submitting D0120 for a first visit can cause a denial or down-code.
- Don't double-bill evaluations. D0120 and another evaluation code (e.g., D0150 or D0140) on the same date for the same provider are usually not both payable.
- Pair it correctly. D0120 is typically reported alongside a prophylaxis (D1110) and any radiographs; each is billed under its own code.
- Watch provider rules. Some plans limit one periodic evaluation per provider per period, which matters in group and multi-provider practices.
Example Case
A patient who has been with the practice for three years arrives for a routine six-month checkup. The hygienist completes a cleaning and takes bitewing radiographs, and the dentist performs the recall evaluation — checking the gums, screening the soft tissue, and confirming no new decay. The visit is coded as D0120 for the evaluation, D1110 for the adult prophylaxis, and the appropriate radiograph code, each on its own line. Because the office confirmed the patient was within their two-exams-per-year benefit, the claim processes cleanly with the expected coverage.
Patients call to "book my checkup" or "I'm due for a cleaning" — not D0120. DentalReception AI answers and books those recall calls live, 24/7, runs hygiene-recall outreach to fill the schedule, and writes the appointment straight into your PMS. See how it handles hygiene recall calls and hygiene recall, or book a demo.
Frequently Asked Questions
What's the difference between D0120 and D0150?
D0120 is the periodic (recall) evaluation for an established patient, while D0150 is the comprehensive evaluation, used for new patients or established patients returning after an extended absence. Using D0120 for a brand-new patient is a common coding error that can lead to a denial.
How often will insurance cover D0120?
Most plans cover two oral evaluations per benefit year — frequently limited to one every six months. A third evaluation in the same year is commonly denied, so tracking the patient's exam history helps you schedule and bill within the limit.
Can D0120 and a cleaning be billed on the same day?
Yes. The periodic evaluation (D0120) and the cleaning (D1110) are separate procedures and are reported under their own codes on the same date. Just be sure the chart documents the doctor's evaluation distinctly from the hygiene services.
Can the hygienist bill D0120?
No. D0120 is the dentist's periodic evaluation and must be performed and documented by the dentist. The hygienist's cleaning is reported separately under its own prophylaxis code (such as D1110). Billing D0120 without a recorded doctor's evaluation is a documentation gap that can surface in an audit.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our hygiene recall feature.