CPT® 33, Under Provider Services and Ambulatory Service Center Modifiers

The Current Procedural Terminology (CPT®) code 33 as maintained by American Medical Association, is a medical procedural code under the range - Provider Services and Ambulatory Service Center Modifiers.

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Lay Term


Append modifier 33 to services which are preventive, such as screenings for specific diseases. Do not append modifier 33 to services that are inherently screening services and contain the word screening in the descriptor, such as a screening mammogram.

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Modifier Guidelines


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