| 16350-1 | Amantadine (serum bactericidal titer) | ABXBACT |
| 16351-9 | aMILoride | DRUG/TOX |
| 16352-7 | aMILoride (Urine) | DRUG/TOX |
| 16353-5 | Amino beta guanidinopropionate (Urine, qualitative) | CHEM |
| 16354-3 | Amino beta guanidinopropionate (Urine) | CHEM |
| 16355-0 | Amino beta guanidinopropionate (qualitative) | CHEM |
| 16356-8 | Amino beta guanidinopropionate | CHEM |
| 16357-6 | Amino beta guanidinopropionate (CSF) | CHEM |
| 16358-4 | Amino beta guanidinopropionate (Amniotic Fluid) | CHEM |
| 16359-2 | Amiodarone+Desethylamiodarone | DRUG/TOX |
| 1636-0 | Somatotropin --pre 250 ug L-dopa TID 2day PO | CHAL |
| 16360-0 | Amitriptyline --peak | DRUG/TOX |
| 16361-8 | Amitriptyline --trough | DRUG/TOX |
| 16362-6 | Ammonia | CHEM |
| 16363-4 | Ammonia (Tissue) | CHEM |
| 16364-2 | Amobarbital in Gastric fluid | DRUG/TOX |
| 16365-9 | Amoxicillin+Clavulanate | DRUG/TOX |
| 16366-7 | Diethylpropion | DRUG/TOX |
| 16367-5 | Amphetamine/Methamphetamine Qualitative (Urine, qualitative) | DRUG/TOX |
| 16369-1 | Amphetamines (Urine, qualitative, confirmatory method) | DRUG/TOX |
| 1637-8 | Somatotropin --pre dose insulin IV | CHAL |
| 16370-9 | Amphotericin B (Urine) | DRUG/TOX |
| 16373-3 | Amyl ether (Blood, qualitative) | DRUG/TOX |
| 16374-1 | Amyl nitrite | DRUG/TOX |
| 16378-2 | Androstenedione --2nd specimen post XXX challenge | CHAL |
| 16379-0 | Androstenedione --3rd specimen post XXX challenge | CHAL |
| 1638-6 | Testosterone --96 hours post 5000 U HCG IM | CHAL |
| 16380-8 | Androstenedione --4th specimen post XXX challenge | CHAL |
| 16381-6 | Androstenedione --5th specimen post XXX challenge | CHAL |
| 16382-4 | Androstenedione --6th specimen post XXX challenge | CHAL |
| 16383-2 | Androstenedione --7th specimen post XXX challenge | CHAL |
| 16384-0 | Androstenedione --8th specimen post XXX challenge | CHAL |
| 16385-7 | Androstenedione --9th specimen post XXX challenge | CHAL |
| 16386-5 | Rifabutin (minimum inhibitory concentration (mic)) | ABXBACT |
| 16387-3 | Rifabutin+Ethambutol (minimum inhibitory concentration (mic)) | ABXBACT |
| 16388-1 | Anticonvulsants (Urine) | DRUG/TOX |
| 16389-9 | Antidepressants | DRUG/TOX |
| 1639-4 | Testosterone --pre 5000 U HCG IM | CHAL |
| 16390-7 | Antidiuretics (Urine) | DRUG/TOX |
| 16391-5 | Antimony (Urine, qualitative) | DRUG/TOX |
| 16392-3 | Nuclear Ab (qualitative, rodent substrate) | SERO |
| 16393-1 | Nuclear Ab (rodent substrate) | SERO |
| 16394-9 | Nuclear Ab (Body Fluid, qualitative, immunofluorescence) | SERO |
| 16395-6 | Antipsychotics (Urine) | DRUG/TOX |
| 164-4 | Cephapirin (minimum lethal concentration (mlc)) | ABXBACT |
| 1640-2 | Thyrotropin --30 minutes post dose TRH IV | CHAL |
| 16400-4 | Appearance of Seminal plasma | SPEC |
| 16401-2 | Arginine (Urine, qualitative) | CHEM |
| 16402-0 | Aromatic solvents (Blood) | DRUG/TOX |
| 16403-8 | Arsenic (qualitative) | DRUG/TOX |