Table 1:

Description of CPT Codes Used for “Stacking” of Molecular Testing

CPT Code	Description
83890	Molecular diagnostics; molecular isolation or extraction, each nucleic acid type
83891	Molecular diagnostics; isolation or extraction of highly purified nucleic acid, each nucleic acid type
83892	Molecular diagnostics; enzymatic digestion, each enzyme treatment
83894	Molecular diagnostics; separation by gel electrophoresis, each nucleic acid preparation
83898	Molecular diagnostics; amplification, target, each nucleic acid sequence
83904	Molecular diagnostics; mutation identification by sequencing, single segment, each segment
83907	Molecular diagnostics; lysis of cells prior to nucleic acid extraction
83909	Molecular diagnostics; separation and identification by high resolution technique
83912	Molecular diagnostics; interpretation and report