Diagnostic CDT Codes2026 Billing Reference Guide

A routine exam for an existing patient to assess changes in their dental and overall health since their last visit.

An evaluation focused on a specific dental problem or complaint, such as pain, swelling, or trauma, rather than a full routine exam.

An oral exam for infants and toddlers under age three that includes counseling the parent or caregiver on oral hygiene, diet, and fluoride use.

A thorough evaluation for a new patient or an established patient being seen for the first time in three or more years, establishing a complete dental baseline.

An in-depth evaluation for a complex dental problem that requires extensive assessment by the dentist, such as traumatic injuries, TMJ disorders, or systemic conditions affecting the mouth.

A follow-up evaluation to reassess a previously diagnosed dental condition and determine whether the current treatment plan needs to be changed.

Covers a re-evaluation - post-operative office visit performed by the dentist to evaluate the patient's oral health status.

A thorough periodontal evaluation that includes full probing depths, clinical attachment levels, bleeding on probing, tooth mobility, and mucogingival assessment for patients with suspected or known periodontal disease.

A limited clinical screening to identify possible problems and determine whether a patient needs a referral for a full evaluation.

Covers a assessment of a patient performed by the dentist to evaluate the patient's oral health status.

Covers a full mouth series (FMX) of radiographic images, typically 14 to 20 periapical and bitewing films capturing all teeth and surrounding structures.

Covers the first periapical radiographic image taken during a visit, capturing a root-to-crown view of one to two teeth in a specific area of concern.

Covers each additional periapical radiographic image taken after the first (D0220) during the same visit, used when multiple targeted views are needed.

A single occlusal X-ray that captures a top-down view of the teeth in either the upper or lower arch.

A standard 2D extra-oral X-ray such as a lateral cephalometric or skull film taken with the sensor outside the mouth.