| General Purpose Reagent | Federal registry | 18 |
| Single (Specified) Analyte Controls (Assayed And Unassayed) | Federal registry | 16 |
| Multi-Analyte Controls, All Kinds (Assayed) | Federal registry | 13 |
| Reagents, Specific, Analyte | Federal registry | 12 |
| Enzyme Immunoassay, Amphetamine | Federal registry | 10 |
| Enzyme Immunoassay, Cannabinoids | Federal registry | 10 |
| Enzyme Immunoassay, Methadone | Federal registry | 10 |
| Enzyme Immunoassay, Opiates | Federal registry | 10 |
| Enzyme Immunoassay, Barbiturate | Federal registry | 9 |
| Enzyme Immunoassay, Benzodiazepine | Federal registry | 9 |
| Enzyme Immunoassay, Phencyclidine | Federal registry | 9 |
| Calibrator, Multi-Analyte Mixture | Federal registry | 8 |
| Enzyme Immunoassay, Cocaine And Cocaine Metabolites | Federal registry | 8 |
| Analyzer, Chemistry (Photometric, Discrete), For Clinical Use | Federal registry | 7 |
| Calibrator, Secondary | Federal registry | 7 |
| Drug Mixture Control Materials | Federal registry | 7 |
| Antinuclear Antibody, Indirect Immunofluorescent, Antigen, Control | Federal registry | 6 |
| Drug Specific Control Materials | Federal registry | 6 |
| Enzymatic Esterase--Oxidase, Cholesterol | Federal registry | 6 |
| Enzyme Immunoassay, Propoxyphene | Federal registry | 6 |
| Gas Chromatography, Methamphetamine | Federal registry | 6 |
| Immunohistochemistry Reagents And Kits | Federal registry | 6 |
| Multi-Analyte Controls Unassayed | Federal registry | 6 |
| Radioimmunoassay, Thyroid-Stimulating Hormone | Federal registry | 6 |
| Reagent, Coronavirus Serological | Federal registry | 6 |
| System, Test, C-Reactive Protein | Federal registry | 6 |
| System, Test, Rheumatoid Factor | Federal registry | 6 |
| System, Test, Vitamin D | Federal registry | 6 |
| Visual, Pregnancy Hcg, Prescription Use | Federal registry | 6 |
| Alcohol Control Materials | Federal registry | 5 |
| Assay, Glycosylated Hemoglobin | Federal registry | 5 |
| Calibrators, Drug Specific | Federal registry | 5 |
| Coronavirus Antigen Detection Test System. | Federal registry | 5 |
| C-Reactive Protein, Antigen, Antiserum, And Control | Federal registry | 5 |
| Enzymatic Method, Creatinine | Federal registry | 5 |
| Enzyme Immunoassay, Non-Radiolabeled, Total Thyroxine | Federal registry | 5 |
| Glucose Oxidase, Glucose | Federal registry | 5 |
| Instrumentation For Clinical Multiplex Test Systems | Federal registry | 5 |
| Ldl & Vldl Precipitation, Cholesterol Via Esterase-Oxidase, Hdl | Federal registry | 5 |
| Radioimmunoassay, Testosterones And Dihydrotestosterone | Federal registry | 5 |
| Radioimmunoassay, Tricyclic Antidepressant Drugs | Federal registry | 5 |
| Urinalysis Controls (Assayed And Unassayed) | Federal registry | 5 |
| Acid, Uric, Uricase (Colorimetric) | Federal registry | 4 |
| Alkaline Picrate, Colorimetry, Creatinine | Federal registry | 4 |
| Apolipoproteins | Federal registry | 4 |
| Azo Dye, Calcium | Federal registry | 4 |
| Calibrators, Drug Mixture | Federal registry | 4 |
| Calibrators, Ethyl Alcohol | Federal registry | 4 |
| Diazo Colorimetry, Bilirubin | Federal registry | 4 |
| Electrode, Ion Specific, Potassium | Federal registry | 4 |
