CPT codes are composed of how many digits?

• A. 3 digits
• B. 5 digits
• C. 4 digits
• D. 6 digits

Answer: (B)

CPT codes are five-digit numeric codes used to describe medical procedures and services in U.S. billing. This five-digit format provides enough combinations to cover a wide range of procedures while staying easy for physicians, coders, and insurers to read and process. You’ll see common examples like 99213 for a typical office visit or 93000 for an electrocardiogram. When additional detail is needed, a two-digit modifier can be added after the main code to convey more information about the service. (There are also other CPT coding families that can be alphanumeric, but the standard base CPT codes used for most procedures are five digits.)