D0120Periodic Oral Evaluation

What This Code Covers

D0120 is the standard recall exam code for established patients returning for their regular six-month checkup. The dentist reviews changes in the patient's dental and medical history, performs a clinical examination, and updates the treatment plan. This code assumes a comprehensive evaluation (D0150) is already on file. The focus is on what has changed since the last visit. D0120 is typically billed alongside prophylaxis (D1110/D1120) and radiographs when indicated.

Billing Guide

Bill this code when:

• Patient is established and returning for a routine recall visit
• Dentist reviews updated medical and dental history and performs a clinical exam
• Patient already has a comprehensive evaluation (D0150) on file at the practice
• Visit is a routine checkup, not an emergency or problem-focused visit

Do not bill this code when:

• Patient is new to the practice, so use D0150 for their first visit
• Billing on the same day as D0150. Only one evaluation code per visit
• The dentist was not present for the evaluation. A hygienist exam alone does not qualify for D0120
• The patient has already reached the payer's frequency limit (usually two per benefit year)

Insurance and Denial Prevention

Key Payer Rules:

• Most plans cover two periodic evaluations per benefit year at 100% in-network
• Delta Dental typically measures every six months from the last eval date, not calendar year
• Some Medicaid programs limit adult periodic evaluations to once per year
• If a patient switches dentists mid-year, evaluations at the previous practice count toward the annual limit

Common Denials and How to Respond:

• Frequency exceeded → Verify benefit year dates. If the denial is valid, patient pays out of pocket. If dates were miscalculated, submit a corrected claim with actual service dates.
• Patient not eligible on date of service → Verify coverage effective dates and appeal with proof of eligibility. If coverage lapsed, work with the patient on payment options.
• Duplicate claim (another eval billed same day) → Review for accidental D0150 or D0140 on the same date. Void the duplicate submission.