Diagnostic · D0100-D0999
D0120 dental code explained
Periodic oral evaluation for an established patient.
What D0120 usually means
Dentists use D0120 when billing for periodic oral evaluation for an established patient.
Why it may appear on your bill
A dental office uses CDT codes to describe the service performed, submit the claim to insurance, and calculate your patient responsibility. If D0120 appears on your statement, compare the dentist's billed charge against the insurance allowed amount and any deductible, coinsurance, or denial reason on your EOB.
What to check before you pay
- • Confirm the code on the bill matches the code on the EOB.
- • Check whether insurance allowed the charge, denied it, or downcoded it.
- • Compare the provider's billed charge to the negotiated or allowed amount.
- • Ask the office for the clinical reason if the code does not match what you remember receiving.
- • Compare diagnostic codes against frequency limits. Many plans limit exams, bitewings, and panoramic X-rays by time period.
Need help decoding this charge?
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