The AMA required providers to use the automated multi-channel test codes when reporting panels composed of the following 22 assays classified as automated, multichannel tests:
Albumin, Bilirubin, direct, Bilirubin, total, Calcium, total, Carbon dioxide, Chloride, Cholesterol, Creatine kinase (CK), Creatinine, Gamma glutamyltransferase (GGT), Glucose, Lactate dehydrogenase (LDH), Phosphatase, alkaline, Phosphorus, Potassium, Protein, total, Sodium, AST (SGOT), ALT (SGPT), Triglycerides, Urea nitrogen (BUN), and Uric acid
In 1998, the AMA deleted the automated panel codes from the CPT. However, to this day, CMS retains the list of automated multi-channel tests for use in setting Medicare reimbursement amounts. Presently, CMS classifies 23 tests as automated, multichannel procedures because in 2008, CMS added ionized calcium to the list.