| 16304-8 | 2-Hexanol/Creatinine (Urine) | DRUG/TOX |
| 16305-5 | 2-Methoxyethanol (Blood) | DRUG/TOX |
| 16306-3 | 3-Methylhistidine (Urine, qualitative) | CHEM |
| 16307-1 | Acetate in Dialysis fluid | DRUG/TOX |
| 16308-9 | Acetazolamide | DRUG/TOX |
| 16309-7 | Acetazolamide (Urine) | DRUG/TOX |
| 1631-1 | Somatotropin --30 minutes post dose insulin IV | CHAL |
| 16310-5 | Acetone (Body Fluid, qualitative) | DRUG/TOX |
| 16311-3 | Acetone (Body Fluid) | DRUG/TOX |
| 16312-1 | Acetonitrile | DRUG/TOX |
| 16313-9 | Acetylene (Blood) | DRUG/TOX |
| 16314-7 | Acetylsalicylate (Urine, qualitative) | DRUG/TOX |
| 16315-4 | Acid phosphatase (Blood, tartrate inhibited) | CHEM |
| 16316-2 | Acid phosphatase tartrate resistant (Blood) | CHEM |
| 16317-0 | Prostatic acid phosphatase in Vaginal fluid (qualitative) | CHEM |
| 16318-8 | Acrylamide (Urine) | DRUG/TOX |
| 16319-6 | Acrylamide | DRUG/TOX |
| 1632-9 | Somatotropin --3 hours post 1 g/kg glucose PO | CHAL |
| 16320-4 | Acyclovir (serum bactericidal titer) | ABXBACT |
| 16321-2 | Acyl carnitine | CHEM |
| 16322-0 | Biperiden | DRUG/TOX |
| 16323-8 | Alanine (Urine, qualitative) | CHEM |
| 16324-6 | Alanine aminotransferase (Red Blood Cells) | CHEM |
| 16325-3 | Alanine aminotransferase/Aspartate aminotransferase | CHEM |
| 16327-9 | Allyl alcohol (Blood) | DRUG/TOX |
| 16328-7 | Benzyl alcohol (Blood, qualitative) | DRUG/TOX |
| 16329-5 | Aldosterone --6th specimen post XXX challenge | CHAL |
| 1633-7 | Somatotropin --45 minutes post dose insulin IV | CHAL |
| 16330-3 | Aldosterone --7th specimen post XXX challenge | CHAL |
| 16331-1 | Aldosterone --8th specimen post XXX challenge | CHAL |
| 16332-9 | Aldosterone --9th specimen post XXX challenge | CHAL |
| 16333-7 | Aldrin (Blood) | DRUG/TOX |
| 16334-5 | Alfentanil (Urine) | DRUG/TOX |
| 16335-2 | Hydrocarbons Aliphatic (Blood) | DRUG/TOX |
| 16336-0 | Alkaline phosphatase.placental | CHEM |
| 16337-8 | Alkaline phosphatase (Urine) | CHEM |
| 16338-6 | Alpha aminoadipate (Urine, qualitative) | CHEM |
| 16339-4 | Alpha aminoisobutyrate (Urine, qualitative) | CHEM |
| 1634-5 | Somatotropin --52 hours post 250 ug L-dopa TID 2day PO | CHAL |
| 16340-2 | Alpha aminoisobutyrate (Urine) | CHEM |
| 16341-0 | Alpha aminoisobutyrate (qualitative) | CHEM |
| 16342-8 | Alpha aminoisobutyrate | CHEM |
| 16343-6 | Alpha aminoisobutyrate (CSF) | CHEM |
| 16344-4 | Alpha aminoisobutyrate (Amniotic Fluid) | CHEM |
| 16345-1 | Alpha aminobutyrate (Urine, qualitative) | CHEM |
| 16346-9 | Alpha chlordane (Urine) | DRUG/TOX |
| 16347-7 | Alpha chlordane (Blood) | DRUG/TOX |
| 16348-5 | Alpha hydroxyalprazolam (Urine, confirmatory method) | DRUG/TOX |
| 16349-3 | Aluminum (Body Fluid) | DRUG/TOX |
| 1635-2 | Somatotropin --pre 1 g/kg glucose PO | CHAL |