| CD40L | CD40 Ligand | 
                
                    | CD46 | CD46 Expression | 
                
                    | CD48 | T Cell Subsets | 
                
                    | CD4TH | T Helper Cells | 
                
                    | CEILS | C1-Esterase Inhibitor Level Serum | 
                
                    | CEOS6 | Circulating Eosinophils, 6 hour | 
                
                    | CEOSB | Circulating Eosinophils, Baseline | 
                
                    | CEOSR | Circulating Eosinophils, Random | 
                
                    | CHIKS | Precipitin Chicken Serum IgG | 
                
                    | CHOL | Cholesterol | 
                
                    | CHTX | Neutrophil Chemotaxis | 
                
                    | CIC | Circulating Immune Complexes (C1q-binding and C3d) | 
                
                    | CL | Chloride | 
                
                    | CM50 | Classical Complement Pathway Activity (CH50) | 
                
                    | CMP | Comprehensive Metabolic Panel | 
                
                    | CMRSA | MRSA Culture | 
                
                    | CMVC | Rapid CMV culture, urine | 
                
                    | CMVR | Rapid CMV culture | 
                
                    | CO2 | Carbon Dioxide | 
                
                    | COCDR | Precipitin Cockatiel Droppings IgG | 
                
                    | COKDR | Precipitin Cockatoo Droppings IgG | 
                
                    | COLPT | Lymphocyte Proliferation to Cobalt | 
                
                    | CPK | Creatine Phosphokinase | 
                
                    | CRCLR | UR Creatinine Clearance 24 Hour | 
                
                    | CREAT | Creatinine | 
                
                    | CRLPT | Lymphocyte Proliferation to Chromium - Blood | 
                
                    | CRYOG | Cryoglobulin Screen | 
                
                    | CXBLD | Blood culture | 
                
                    | CXCF | Cystic Fibrosis Respiratory Culture | 
                
                    | CXCSF | Cerebrospinal Fluid Culture | 
                
                    | CXDWD | Deep Wound Culture | 
                
                    | CXFLD | Fluid Culture | 
                
                    | CXFUN | Fungal Culture | 
                
                    | CXGRA | Group A Strep Culture | 
                
                    | CXHSV | Herpes simplex virus (HSV) culture | 
                
                    | CXLEG | Legionella Culture | 
                
                    | CXMYC | Mycoplasma pneumoniae culture | 
                
                    | CXRES | Respiratory Culture | 
                
                    | CXSIN | Sinus Culture | 
                
                    | CXSTO | Stool Culture | 
                
                    | CXSWD | Superficial Wound Culture | 
                
                    | CXTHR | Throat Culture | 
                
                    | CXTIP | Catheter Tip Culture | 
                
                    | CXURI | Urine Culture | 
                
                    | DDIME | D-Dimer | 
                
                    | DHR | Dihydrorhodamine Oxidation | 
                
                    | DSDNA | Anti-Double-stranded DNA antibody | 
                
                    | ENA6 | Extractable Nuclear Antigens | 
                
                    | ENPCR | Enterovirus by PCR | 
                
                    | ENVCX | Environmental Culture and Identification for Acid Fast Bacilli |