| 14816-3 | Lipoprotein.pre-beta (electrophoresis) | CHEM |
| 14817-1 | LORazepam | DRUG/TOX |
| 14818-9 | Lymphocytes/Leukocytes in Pericardial fluid (manual count) | HEM/BC |
| 14819-7 | Lymphocytes/Leukocytes in Bronchial specimen (manual count) | HEM/BC |
| 1482-9 | Galactose --30 minutes post 40 g galactose PO (Blood) | CHAL |
| 14820-5 | Lymphocytes/Leukocytes (Pleural Fluid, manual count) | HEM/BC |
| 14821-3 | Lymphocytes/Leukocytes (Peritoneal Fluid, manual count) | HEM/BC |
| 14822-1 | Lymphocytes/Leukocytes (Synovial Fluid, manual count) | HEM/BC |
| 14823-9 | Macrophages/Leukocytes in Bronchial specimen (manual count) | HEM/BC |
| 14824-7 | Magnesium in Stone (qualitative) | CHEM |
| 14825-4 | Maprotiline | DRUG/TOX |
| 14826-2 | Meperidine in Gastric fluid (qualitative) | DRUG/TOX |
| 14827-0 | Mesoporphyrin (Stool) | CHEM |
| 14828-8 | Mesothelial cells/Leukocytes in Pericardial fluid (manual count) | HEM/BC |
| 14829-6 | Mesothelial cells/Leukocytes (Pleural Fluid, manual count) | HEM/BC |
| 1483-7 | Galactose in 5 hour Urine --post 40 g dose PO | CHAL |
| 14830-4 | Mesothelial cells/Leukocytes (Peritoneal Fluid, manual count) | HEM/BC |
| 14831-2 | Metanephrine/Creatinine (Urine) | CHEM |
| 14832-0 | Metanephrines (Urine) | CHEM |
| 14833-8 | Metanephrines in 24 hour Urine | CHEM |
| 14834-6 | Methamphetamine in Gastric fluid (qualitative) | DRUG/TOX |
| 14835-3 | Methanol | DRUG/TOX |
| 14836-1 | Methotrexate | DRUG/TOX |
| 14837-9 | Methsuximide | DRUG/TOX |
| 14838-7 | Toxoplasma gondii (Tissue, qualitative, organism specific culture) | MICRO |
| 14839-5 | Trypanosoma sp identified in Buffy Coat (light microscopy) | MICRO |
| 1484-5 | Gastrin --10 minutes post 0.2 U/kg secretin | CHAL |
| 14840-3 | Trypanosoma sp identified (CSF, wet preparation) | MICRO |
| 14841-1 | Microscopic observation in Specimen (iron hematoxylin stain) | MICRO |
| 14842-9 | Microscopic observation in Specimen (kinyoun iron hematoxylin stain) | MICRO |
| 14843-7 | 6-Monoacetylmorphine (6-MAM) in Gastric fluid (qualitative) | DRUG/TOX |
| 14844-5 | 6-Monoacetylmorphine (6-MAM) (qualitative) | DRUG/TOX |
| 14845-2 | Monoacetylmorphine (Urine, qualitative) | DRUG/TOX |
| 14846-0 | N-acetylprocainamide | DRUG/TOX |
| 14847-8 | Neutrophils/Leukocytes in Pericardial fluid (manual count) | HEM/BC |
| 14848-6 | Neutrophils/Leukocytes (Pleural Fluid, manual count) | HEM/BC |
| 14849-4 | Nitrazepam | DRUG/TOX |
| 1485-2 | Gastrin --15 minutes post 0.2 U/kg secretin | CHAL |
| 14850-2 | Nitrazepam (Urine) | DRUG/TOX |
| 14851-0 | Norclozapine | DRUG/TOX |
| 14852-8 | Norepinephrine | CHEM |
| 14853-6 | Norepinephrine (Urine) | CHEM |
| 14854-4 | Norepinephrine in 24 hour Urine | CHEM |
| 14855-1 | Norfluoxetine | DRUG/TOX |
| 14856-9 | Nortriptyline | DRUG/TOX |
| 14857-7 | Leukocytes other/Leukocytes in Pericardial fluid (manual count) | HEM/BC |
| 14858-5 | Leukocytes other/Leukocytes (Pleural Fluid, manual count) | HEM/BC |
| 14859-3 | Leukocytes other/Leukocytes (Peritoneal Fluid, manual count) | HEM/BC |
| 1486-0 | Gastrin --20 minutes post 0.2 U/kg secretin | CHAL |
| 14860-1 | Leukocytes other/Leukocytes (Synovial Fluid, manual count) | HEM/BC |