| A1R | A1 Antigen Subtype, Blood Mayo Clinic Laboratories in Rochester | 
      
        | ABORH | ABO and Rh Typing, Blood Decatur Morgan Hospital-Decatur General Campus/Parkway Campus | 
      
        | ABSCD4 | Absolute CD4, Blood Huntsville Hospital Laboratory | 
      
        | ACAC | Acacia, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | ACARP | Acanthamoeba species, Molecular Detection, PCR, Ocular Mayo Clinic Laboratories in Rochester | 
      
        | ACAR | Acarus siro, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | ACTMN | Acetaminophen Level (Tylenol), Plasma or Serum Decatur Morgan Hospital-Decatur General Campus/Parkway Campus | 
      
        | ACMA | Acetaminophen, Serum Mayo Clinic Laboratories in Rochester | 
      
        | ACETONE | Acetone Decatur Morgan Hospital-Decatur General Campus/Parkway Campus | 
      
        | ARBI | Acetylcholine Receptor (Muscle AChR) Binding Antibody, Serum Mayo Clinic Laboratories in Rochester | 
      
        | ACHE_ | Acetylcholinesterase, Amniotic Fluid Mayo Clinic Laboratories in Rochester | 
      
        | ASCL1 | Achaete-Scute Homolog 1 (ASCL1) Immunostain, Technical Component Only Mayo Clinic Laboratories in Rochester | 
      
        | GAAWR | Acid Alpha-Glucosidase Reflex, Leukocytes Mayo Clinic Laboratories in Rochester | 
      
        | GAAW | Acid Alpha-Glucosidase, Leukocytes Mayo Clinic Laboratories in Rochester | 
      
        | ASMW | Acid Sphingomyelinase, Leukocytes Mayo Clinic Laboratories in Rochester | 
      
        | AFBS | Acid-Fast Bacilli (AFB) Stain Only Huntsville Hospital Laboratory | 
      
        | SAFB | Acid-Fast Smear for Mycobacterium, Varies Mayo Clinic Laboratories in Rochester | 
      
        | SMACN | Actin, Smooth Muscle (SMActin) Immunostain, Technical Component Only Mayo Clinic Laboratories in Rochester | 
      
        | ACT | Actinomyces Culture, Varies Mayo Clinic Laboratories in Rochester | 
      
        | A.C.T. | Activated Clotting Time (ACT) Decatur Morgan Hospital-Decatur General Campus | 
      
        | (A)PTT HEP | Activated Partial Thromboplastin Time (APTT, PTT), Heparin Protocol, Plasma Decatur Morgan Hospital-Decatur General Campus | 
      
        | (A) PTT | Activated Partial Thromboplastin Time (APTT, PTT), Plasma Decatur Morgan Hospital-Decatur General Campus | 
      
        | (A) PTT PL | Activated Partial Thromboplastin Time (APTT, PTT), Plasma Decatur Morgan Hospital-Parkway Campus | 
      
        | APMSC | Activated Partial Thromboplastin Time (APTT) Mix 1:1, Plasma Mayo Clinic Laboratories in Rochester | 
      
        | APTSC | Activated Partial Thromboplastin Time (APTT), Plasma Mayo Clinic Laboratories in Rochester |