| ABO/Rh | ABRH |
| ACETAMINOPHEN (TYLENOL) | ACPN |
| ACETONE | ACET |
| Acetylcholine Receptor Binding Antibody | ACY |
| Acetylcholine Receptor Blocking Antibody | ACHRB |
| Acetylcholine Receptor Modulating Antibody | ACHRM |
| Acid Phosphatase, Prostatic | |
| Acremonium Kiliense IgE | ACKI |
| ACTH, Plasma | ACTH |
| Actin (Smooth Muscle) Antibody (IgG) | ASMA |
| Activated Protein C-Resistance | APCR |
| Acute Hepatitis Profile | AHPR |
| Albumin | ALB |
| Aldolase | ALD |
| Aldosterone, 24-hour Urine | U24AL |
| Aldosterone, LC/MS/MS | ALDOS |
| Alkaline Phosphatase | AP |
| Alkaline Phosphatase Isoenzymes (ALP Isoenzymes) | APISO |
| Almond Nut IgE | ALM |
| Alpha Subunit | ASUB |
| Alpha-1-Antitrypsin (AAT) Mutation Analysis | A1AP |
| Alpha-1-Antitrypsin (AAT) Quantitation | A1A |
| Alpha-1-Antitrypsin, Feces, Random | A1AF |
| Alpha-Fetoprotein, Tumor Marker | AFPT |
| Alpha-Lactalbumin (f76) IgE | ALFA |
| Alprazolam | ALPRAZ or XANAX |
| ALT Alanine Aminotransferase (GPT) | ALT |
| Alternaria Alternata IgE | ALTERN |
| Aluminum, Serum | ALUM |
| AMIKACIN (PEAK) | PAMI |
| AMIKACIN (TROUGH) | TAMI |
| AMIKACIN, 6 HOUR | AMI6 |
| Amino Acid Analysis, LC/MS, Urine | UAAQN |
| Amino Acid Analysis, Quantitative, Plasma | AAQP |
| Amiodarone | AMIOD |
| Amitriptyline | ATPL |
| AMMONIA (NH3) | AMON |
| AMYLASE | AMY |
| AMYLASE, 2 HR URINE | UA2 |
| AMYLASE, 24 HR URINE | UA24 |
| Amylase, Serum | AMY |
| ANAEROBIC CULTURE | ANCU |
| ANCA Screen with Reflex to ANCA Titer | CANCA |
| Androstenedione, LC/MS/MS | ASD |
| Angiotensin Converting Enzyme (ACE) | A1CE |
| Angiotensin Converting Enzyme (ACE), CSF | ACE |
| Animal Screen (ex1) | RASTEPI1 |
| ANNA-1 | HU |
| ANTENATAL RHOGAM | RANT |
| Antibody Screen (Indirect Coombs') | ABSC |
| ANTI-DOUBLE STRANDED DNA | ADNA |
| Antifungal Susceptibility, Custom MIC (1) | YS |
| ANTI-HEPATITIS A VIRUS (IGM) | HAV |
| ANTI-HEPATITIS B CORE (TOTAL) | HBCT |
| ANTI-NUCLEAR ABY SCREEN / RFLX | ANAQ |
| Antithrombin III Activity | AT3 |
| Apolipoprotein A1 | APO A1 |
| Apolipoprotein A1 & B | APO |
| Apolipoprotein B | APO B |
| Apple (f49) IgE+ | APPL |
| APT FOR FETAL HEMOGLOBIN | APT |
| Arginine Vasopressin (AVP, Antidiuretic Hormone, ADH) | ADH |
| Arsenic, 24-Hour Urine | UARS |
| Arsenic, Blood | ARSNS |
| Arsenic, Random Urine | ARSRU |
| Ascorbic Acid | ASAC |
| Aspergillus fumigatus (m3)IgE+ | ASP |
| Aspergillus niger (m207) IgE+ | ASPN |
| AST Aspartate Aminotransferase (GOT) | AST |
| Aureobasidium Pullulans IgE | AUPU |
| AUTOLOGOUS LEUKOREDUCED PACKED CELL | APC |