In table B23, what does the number 3 denote?

In ICD-10-PCS coding, each character in the code corresponds to a specific aspect of the procedure being performed, and these elements are defined in the tables. The number 3 in table B23 specifically denotes "Plain radiography."

Plain radiography is a basic imaging technique, commonly known as X-ray, which utilizes ionizing radiation to produce images of the internal structures of the body. This classification is essential for providing clear distinctions among various imaging modalities for accurate coding and billing purposes.

Understanding the context of table B23 allows coders to correctly identify the specific type of imaging service being performed. Each category in this table corresponds to a different imaging technique, helping to ensure that the appropriate codes are applied according to the type of procedure conducted.