D0150 is the CDT code for a comprehensive oral evaluation — the thorough, full-mouth exam used for a new patient or an established patient who has been away for an extended period or has a significant change in health.
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 D0150 Code
Use D0150 for a comprehensive evaluation — the in-depth first-visit exam that includes a full review of the patient's dental and medical history, a thorough hard- and soft-tissue exam, periodontal screening, oral-cancer screening, and an overall assessment. It applies to new patients and to established patients returning after a long absence or presenting with a major change in health.
Don't confuse it with the periodic recall exam, D0120, which is the routine six-month evaluation of an already-established patient, or with the limited, problem-focused exam, D0140, used for a single acute complaint. Coding every recall visit as D0150 — or billing a brand-new patient as D0120 — is a common error.
Documentation & Clinical Scenarios
A comprehensive evaluation should leave a chart that reflects its scope:
- New or returning status and the date, with history showing why a comprehensive exam was warranted.
- A complete evaluation — full dental charting, periodontal screening, soft-tissue and oral-cancer screening, and existing-restoration review.
- Medical history review and any findings affecting care.
- The provider who performed the evaluation, plus a treatment plan or problem list where applicable.
Radiographs taken to support the exam (such as D0210 or D0220) and any cleaning are reported separately under their own codes.
Insurance & Billing Tips
- Verify new-patient eligibility. Many plans allow D0150 once per provider for a new patient, or once every few years for an established patient — confirm before billing.
- Don't routinely repeat it. Submitting D0150 at every recall instead of D0120 is a frequent down-code or denial trigger.
- Watch the frequency clock. Some payers count D0150 against the same annual evaluation allowance as D0120 and D0140.
- Pair it correctly. D0150 is typically billed alongside radiographs and a prophylaxis (D1110), each on its own line.
- Document the comprehensive scope. A thin chart note can prompt a down-code to a periodic exam; the record should show the full evaluation actually occurred.
Example Case
A new patient who hasn't seen a dentist in several years schedules a first visit. The dentist completes a full evaluation — comprehensive charting, periodontal screening, oral-cancer screening, and a medical-history review — and orders a full-mouth radiographic series. A cleaning is performed the same day. The visit is coded D0150 for the comprehensive evaluation, with the radiograph series and the prophylaxis (D1110) each on their own lines. Because the office verified the patient qualified as new under the plan, the claim processes with the expected coverage.
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Frequently Asked Questions
What's the difference between D0150 and D0120?
D0150 is the comprehensive evaluation for a new patient (or an established patient returning after a long absence or major health change), while D0120 is the periodic recall exam for someone already established with the practice. Billing D0150 at every six-month checkup is a common error — most routine recalls should be coded D0120, which can otherwise lead to a denial or down-code.
Can D0150 be billed for an established patient?
Yes, in specific situations. The descriptor covers new or established patients, so D0150 can apply when an established patient returns after an extended absence or presents with a significant change in health that warrants a full re-evaluation. Routine six-month recalls, however, should generally use D0120. Documentation should explain why a comprehensive exam was clinically necessary.
How often will insurance cover D0150?
Frequency rules vary. Many plans allow D0150 once per new patient per provider, or once every few years for established patients, and some count it against the same annual evaluation allowance as periodic and limited exams. Verifying the patient's eligibility and the plan's comprehensive-exam frequency before the visit helps the claim process cleanly.
Does D0150 include X-rays and a cleaning?
No. D0150 covers only the comprehensive evaluation. Radiographs (such as D0210 or D0220) and the cleaning (D1110) are separate procedures, each reported under its own code on the same date. Be sure the chart documents the doctor's evaluation distinctly from the hygiene and imaging services performed at the visit.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.