Summary & Overview
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.
Billing Code Overview
CDT code D0120 represents a periodic oral evaluation for an established patient. This service documents a routine follow-up dental assessment to review oral health status, detect changes since the previous evaluation, and determine the need for additional diagnostic or preventive services.
Service Type: Dentistry
Typical Site of Service: Dental Office (POS 11)
Clinical & Coding Specifications
Clinical Context
A 42-year-old established dental patient presents for a routine periodic oral evaluation in a dental office (POS 11). The patient reports no new complaints but mentions mild bleeding after flossing. The dentist reviews the medical history, performs an oral soft tissue and periodontal screening, inspects existing restorations and teeth for caries, and documents findings. If no significant changes are found, the visit is billed as CDT code D0120. If limited pathology is identified, appropriate diagnostic or treatment codes are added during the same encounter.
Coding Specifications
-
Common Modifiers
-
52- Reduced Services: Use when the periodic oral evaluationD0120is performed in a substantially reduced manner relative to the full service as described. Document the reason for reduced service in the record. -
76- Repeat Procedure by Same Dentist: Use when the same dentist repeats the identical procedureD0120subsequent to an earlier performance of the same procedure on the same day or within a short timeframe where payer rules permit billing a repeat service. Documentation should justify the repeat. -
Associated Provider Taxonomies
-
122300000X- General Practice Dentist: Represents general dentistry providers who commonly perform periodic oral evaluations.