CPT® Code 78835

Add-On Code

The CPT® Code 78835 refers to the process of radiopharmaceutical quantification measurement(s) for a single area, which is reported separately in addition to the code for the primary procedure. This code is utilized in conjunction with previously acquired SPECT-CT imaging data, specifically codes 78830 and 78832. The purpose of this quantification is to provide a more detailed analysis beyond mere visual inspection of the images, particularly in assessing the extent of therapeutic uptake or response in cases involving malignant or metastatic lesions. This detailed quantification aids healthcare professionals in determining the appropriate course of treatment or prognosis for the patient.

In the context of SPECT-CT imaging, the initial imaging is performed in three-dimensional format and in list mode, which captures the raw, unreconstructed detector signal output. This method allows for a more accurate quantification process. The acquired data is then filed for quantitation and exported to a dedicated computer system. Following the standard SPECT-CT image processing, additional processing is conducted using specialized software designed for quantitation. This processed data is subsequently imported into a quality control software program for thorough analysis. The physician is provided with both the processed dataset and its quality information for review, which includes critical metrics such as bolus duration, peak and plateau waveforms, and tumor uptake within a specified time interval post-administration. Ultimately, the quantitation data is integrated with the imaging data, attenuation values, and relevant clinical information to generate a comprehensive report for clinical decision-making.