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
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Common Modifiers
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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
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122300000X- General Practice Dentist: Represents general dentistry providers who commonly perform periodic oral evaluations. -
1223D0001X- Dental Public Health Dentist: Represents dentists focused on community and public health dentistry who may provide screening and periodic evaluations in public settings. -
1223E0200X- Endodontics Dentist: Represents endodontic specialists; while not the usual provider for routine periodic evaluations, endodontists can perform evaluations for established patients when appropriate.
Related Diagnoses
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K02.9- Dental caries, unspecified -
Clinical relevance: Dental caries may be identified or monitored during a periodic oral evaluation
D0120; findings can lead to diagnostic imaging or restorative treatment. -
K05.6- Periodontal disease, unspecified -
Clinical relevance: Periodontal status assessment is part of
D0120; evidence of periodontal disease on exam may prompt scaling, periodontal charting, or referral. -
K08.8- Other specified disorders of teeth and supporting structures -
Clinical relevance: Miscellaneous dental conditions identified during
D0120may fall under this category and guide further diagnostic or treatment planning. -
Z01.20- Encounter for dental examination and cleaning without abnormal findings -
Clinical relevance: Represents a periodic visit documented as having no abnormal findings; appropriate when
D0120yields a normal exam and preventive care plans. -
Z01.21- Encounter for dental examination and cleaning with abnormal findings -
Clinical relevance: Used when
D0120uncovers abnormalities requiring additional procedures, diagnostics, or treatment planning.
Related Codes
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D1110- Prophylaxis - adult -
Relationship: Commonly performed during the same visit when a periodic oral evaluation
D0120identifies the need for routine cleaning;D1110is often billed alongsideD0120when clinical findings support prophylaxis. -
D1206- Topical application of fluoride varnish -
Relationship: Applied during or after a periodic oral evaluation
D0120when preventive topical fluoride is indicated; commonly used together for preventive care. -
D0150- Comprehensive oral evaluation - new or established patient -
Relationship: Used instead of
D0120when the patient requires a comprehensive evaluation rather than a periodic evaluation (for new patients or when more extensive assessment is needed); an alternative code depending on the scope of the exam. -
D0274- Bitewings - four radiographic images -
Relationship: Frequently ordered during the same appointment as
D0120if bitewing radiographs are indicated based on the clinical exam; commonly used together to evaluate interproximal caries.
National Reimbursement Benchmarks
National commercial mean rates for CDT code D0120 vary materially: UnitedHealthcare and Blue Cross Blue Shield report the highest mean rates at $37.18 and $32.25 respectively, while Cigna Health and Aetna report lower means at $17.24 and $19.60. BUCA (average commercial) has a mean of $24.73. Medicare data is not provided in the input.
Rate dispersion, measured as the difference between the 75th and 25th percentiles, is widest for Blue Cross Blue Shield (38.00 − 23.00 = $15.00) and UnitedHealthcare (41.50 − 32.60 = $8.90). Cigna Health (20.00 − 15.00 = $5.00) and Aetna (20.00 − 14.50 = $5.50) show tighter distributions. BUCA's dispersion is $15.91 (31.91 − 16.00). The table and chart below present the full breakdown.
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