See the list of individual test components included in each basic panel. If you will bill both Panels you will get denial with Renal Panel. To get reimbursement of all the work done, you can bill Comprehensive Metabolic Panel(which includes all tests of Renal Panel except Phosphate) and bill 84100 as an individual test.
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Comprehensive Metabolic Panel
CPT 80053
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*Albumin (82040)
*Bilirubin, total (82247)
*Calcium (82310)
*Carbon dioxide (82374)
*Chloride (82435)
*Creatinine (82565)
*Glucose (82947)
*Phosphatase, alkaline (84075)
*Potassium (84132)
*Protein, total (84155)
*Sodium (84295)
*Transferase, alanine amino (ALT) (SGPT) (84460)
*Transferase, aspartate amino (AST) (SGOT) (84450)
*Urea Nitrogen (BUN) (84520)
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Renal Function Panel
CPT 80069
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*Albumin (82040)
*Calcium (82310)
*Carbon dioxide (82374)
*Chloride (82435)
*Creatinine (82565)
*Glucose (82947)
*Phosphorus, inorganic (phosphate) (84100)
*Potassium (84132)
*Sodium (84295)
*Urea Nitrogen (BUN) (84520)