CPT, ICD-10, & CDT Coding Systems Flashcards

What does CDT code D9910 represent?

Answer: Application of desensitizing medicament

D9910 is the CDT code for application of desensitizing medicament, used for patients with hypersensitive teeth.

When ICD-10-CM instructs 'Code first' for a dental condition, the coder should:

Answer: List the underlying condition before the manifestation code

'Code first' is a sequencing instruction requiring the underlying etiology to be listed before the manifestation code.

A patient presents for scaling and root planing of two teeth in one quadrant. Which CDT code is reported?

Answer: D4342

D4342 is for scaling and root planing involving one to three teeth per quadrant, distinguishing it from D4341 (four or more teeth).

Which of the following correctly describes how CDT codes differ from CPT codes?

Answer: CDT codes are exclusively for dental procedures; CPT codes cover medical and surgical procedures

CDT codes are dental-specific procedure codes maintained by the ADA, while CPT codes cover the broader range of medical and surgical services maintained by the AMA.

ICD-10-CM code Z01.21 would be used in which clinical scenario?

Answer: Routine dental examination with abnormal findings

Z01.21 is the ICD-10-CM code for encounter with dental examination with abnormal findings, distinguishing it from a routine exam with no findings.

A dentist performs a core buildup on a tooth in preparation for a crown. Which CDT code is reported separately from the crown?

Answer: D2950

D2950 is the CDT code for core buildup, including any pins when required, reported separately from the crown restoration.

Which modifier is added to a CPT code to indicate a procedure was performed on the lower left quadrant in a dental setting?

Answer: There is no CPT quadrant modifier; CDT uses tooth-specific coding

CPT does not have dental quadrant-specific modifiers; dental procedures use CDT codes with tooth numbers or quadrant designations natively.