CDT D0120: Periodic Oral Evaluation, Established Patient

CDT code D0120 denotes a periodic oral evaluation for an established dental patient and is a common procedure code across dental practices nationwide. It captures routine follow-up assessments that monitor oral health, identify new or progressing issues, and guide the need for further diagnostic or therapeutic interventions. The code is central to preventive oral care workflows and dental quality measurement, informing clinical documentation and payer coverage determinations.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, and UnitedHealthcare. Coverage policies and administrative requirements for D0120 influence access to routine dental evaluations and shape billing practices in office-based dental settings.

Readers will find a concise overview of the code’s clinical context, typical site of service, common related procedures, and applicable ICD-10 diagnostic categories used to justify the visit. The publication summarizes common modifiers and related CDT codes used in conjunction with D0120, outlines typical utilization scenarios, and highlights documentation elements that payers commonly review. Where input data is incomplete, the text notes missing elements as "Data not available in the input." The intent is to provide clinicians, billers, and policy stakeholders a practical reference for the role of D0120 in routine dental care and its interactions with payer policy and coding practice.