| CDIFPCR | C Difficile by RT-PCR | — |
| CPT | C Peptide | — |
| CRP | C Reactive Protein | Particle-Enhanced Immunoturbidimetric Assay |
| CTPTD | C-Telopeptide, Beta-Cross-Linked, Serum | — |
| CDIFB | C. diff toxin B gene (tcdB) by PCR | — |
| C1EI | C1-Esterase Inhibitor | — |
| CEIF | C1-Esterase Inhibitor Functional | — |
| C3AR | C3a Level By RIA | — |
| C4AR | C4a Level By RIA | — |
| CA153 | CA 15-3, Cancer Antigen - Breast | — |
| C199 | CA 19-9, Cancer Antigen - GI | — |
| CABBGE | Cabbage IgE | — |
| CADUA | Cadmium, 24 Hr. Urine | — |
| CADB | Cadmium, Blood | — |
| CFNE | Caffeine, Serum or Plasma | — |
| CALT | Calcitonin | — |
| CA | Calcium | Photometric, Colorimetric Method |
| UCA | Calcium Urine, Random | Photometric, Colorimetric Method |
| TCA | Calcium, 24 Hr. Urine | Photometric, Colorimetric Method |
| CLPTN | Calprotectin, Stool | — |
| CALR | CALR Exon 9 Mutation Analysis | — |
| CAMPY | Campylobacter Stool Culture | — |
| C272 | Cancer Antigen - CA 27.29 | — |
| C125 | Cancer Antigen 125 | Electrochemiluminescence Immunoassay |
| C12M | Cancer Antigen 125 Serial Monitor | Electrochemiluminescence Immunoassay |
| CAQT | Candida albicans Antibodies, IgG, IgM, IgA | — |
| CAURS | Candida auris PCR w/reflex to culture | — |
| CVTV | Candida Vaginitis & Trichomonas Vaginalis (CV/TV) by TMA | — |
| FCBDS | Cannabidiol (Epidiolex) Serum | — |
| CARBB | Carbamazepine | — |
| CMZF | Carbamazepine, Free & Total | — |
| CARPG | Carbamylated Protein (CarP) Antibody, IgG | — |
| LVDPA | Carbidopa and Levodopa Quantitative, Serum | — |
| CDT | Carbohydrate Deficient Transferrin for Alcohol Use | — |
| CRUR | Carbohydrate, Random Urine | — |
| HC3 | Carbon Dioxide | Enzymatic, Kinetic, Spectrophotometric Method |
| COV | Carbon Monoxide (Carboxyhemoglobin) | — |
| CEAS | Carcinoembryonic AG | Electrochemiluminescence Immunoassay |
| CEAFL | Carcinoembryonic Antigen, Fluid | — |
| CARPP | Cardiac Panel | — |
| ACABP | Cardiolipin Antibodies, IgG and IgM | Multiplex Flow Immunoassay |
| ACLB | Cardiolipin Antibodies, IgG, IgM, IgA | — |
| ACLA | Cardiolipin Antibody, IgA | — |
| CDCARI | Carisoprodol & Metabolite, UR, Quant | — |
| CARNPAN | Carnitine Panel | — |
| CARN | Carnitine, Free & Total | — |
| CAR | Carotene | — |
| CARRT | Carrot IgE | — |
| CASHEW | Cashew, IgE | — |
| CASRZ | CASR Gene, Full Gene Analysis | — |
| CATSUP | Catecholamines Fractionated, Plasma, Supine | — |
| CATUPR | Catecholamines Fractionated, Plasma, Upright | — |
| CTFU | Catecholamines Fractionated, Urine, Random or 24 Hr. | — |
| CATFSH | Catfish IgE | — |
| TIPCU | Catheter Tip Culture | — |
| CBFB | CBFB-MYH11 inv(16) Detection, Quant | — |
| CD3LV | CD3, CD19, CD56 Levels | — |
| CD57NK | CD57 (HNK1) + NK Cells | — |
| CELERY | Celery IgE | — |
| CDGF | Celiac Disease Gluten-Free Cascade | — |
| CELRFX | Celiac Disease Reflexive Cascade | — |
| CELSCR | Celiac Disease Screen | — |
| CDQDNA | Celiac HLA DQ2, DQ8 | — |
| CENO | Cenobamate, Serum or Plasma | — |
| CTRM | Centromere B Antibody, IgG | — |
| CERAM | Ceramides, Plasma | — |
| CERU | Ceruloplasmin | — |
| PMP22 | Charcot-Marie-Tooth & Related Hereditary Neuropathies w/reflex | — |
| CHERRY | Cherry IgE | — |
| CHICKN | Chicken IgE | — |
| CHKPEA | Chickpea (Garbanzo Bean) IgE | — |
| CART | Chikungunya Antibodies, IgG, IgM | — |
| CHIKPN | Chikungunya by PCR | — |
| CHITO | Chitotriosidase Assay (CHITO) | Fluorometric Enzyme Assay |
| CHLPAP | Chlamydia Antibody Panel, IgG & IgM by IFA | — |
| CPGMA | Chlamydia pneumoniae IgG, IgM, IgA | Immunofluorescence |
| CGAMD | Chlamydia trachomatis & N. gonorrhoeae, TMA, Eye Only | — |
| CTCU | Chlamydia trachomatis Culture | — |
| CTLGV | Chlamydia trachomatis L serovars (LGV) by PCR | — |
| CL | Chloride | Indirect Ion-Selective Electrode Method |
| FCHL | Chloride, Body Fluid | Indirect Ion-Selective Electrode Method |
| TCLL | Chloride, Urine, 24 Hr. | — |
| UCLL | Chloride, Urine, Random | — |
| CHOCLT | Chocolate, IgE | — |
| YFCCK | Cholecystokinin (CCK) | — |
| CHOL | Cholesterol | Enzymatic Colorimetric Method |
| CHOLF | Cholesterol, Body Fluid | Enzymatic Colorimetric Method |
| CHLS | Cholinesterase (Pseudocholinesterase), Total | — |
| CEST | Cholinesterase, RBC | — |
| ANTCA | Chromatin Antibody, IgG | — |
| CRS | Chromium, Serum | — |
| CHRUR | Chromium, Urine (Random or 24 Hour) | — |
| CH9 | Chromogenic Factor IX Activity Assay, Plasma | — |
| CHGN | Chromogranin A | — |
| CBL | Chromosome Analysis, Blood | — |
| CIDP | Chronic Inflammatory Demyelinating Polyradiculoneuropathy/Nodopathy Evaluation | — |
| CLLDF | Chronic Lymphocytic Leukemia, Diagnostic FISH, Varies | — |
| CUINDX | Chronic Urticaria Index | — |
| CHYMF | Chymotrypsin, Fecal | — |
| CICP | Circulating Immune Complex Panel | — |
| C1QB | Circulating Immune Complex, C1q Binding | — |
| CIT | Citric Acid, Random or 24 Hr. Urine (Citrate) | — |
| CKIS | CK (Creatine Kinase) Isoenzymes, Serum | — |
| CK | CK, Total | Kinetic, Spectrophotometric UV Method |
| CLOB | Clobazam (Onfi) | — |
| CLONZ | Clonazepam | — |
| CLOZ | Clozapine and Metabolites, Serum | — |
| CBLTR | Cobalt, Serum or Plasma | — |
| COCAS | Cocaine Metabolite, Serum or Plasma, Quant | — |
| COCA | Cocaine Metabolite, Urine Quant | — |
| CAPAB | Coccidioides Antibodies IgG, IgM by CF | — |
| COCAP | Coccidioides Antibodies Panel, Serum | — |
| COCAR | Coccidioides Antibodies Reflex Panel, Serum | — |
| COCG | Coccidioides Antibody, IgG (RPS) | — |
| COCM | Coccidioides Antibody, IgM | — |
| COCNUT | Coconut, IgE | — |
| COQ10 | Coenzyme Q10, Total | — |
| CAGLT | Cold Agglutinins Titer | — |
| CTVII | Collagen Type VII Antibody IgG by ELISA | — |
| CRCGP | Common Red Cell Genotype Panel | — |
| AH50 | Complement Activity, Alternative Pathway AH50 | — |
| C2 | Complement C2 | — |
| CC1Q | Complement Component 1Q (C1q) | — |
| COMP5 | Complement Component 5 | — |
| C3C4 | Complement Profile (C3 & C4) | — |
| C3 | Complement, C3 | — |
| C4 | Complement, C4 | — |
| CH50 | Complement, Total | — |
| CBC | Complete Blood Count | — |
| CBC6 | Complete Blood Count w/ 6 part differential | — |
| CPSA | Complexed PSA | — |
| CMPM | Comprehensive Metabolic Panel | Please see individual components for methodology |
| RCDIFD | Confirmatory C Diff Toxin | — |
| CCMVD | Congenital CMV PCR (patients <21 days old) | — |
| ANAC | Connective Tissue Diseases Profile | — |
| CAP2GR | Contactin-Assoc. Protein-2 Ab, IgG CBA-IFA w/reflex to Titer | — |
| COPEP | Copeptin proAVP, Plasma (ADH) | — |
| COPP | Copper, Free, Serum or Plasma | — |
| CUR | Copper, RBC | — |
| CU | Copper, Serum or Plasma | — |
| XCU | Copper, Urine, Random or 24 Hr. | — |
| CRN | Corn IgE | — |
| CBGR | Corticosteroid Binding Globulin | — |
| CRT | Cortisol | Electrochemiluminescence Immunoassay |
| CRTA | Cortisol, AM | Electrochemiluminescence Immunoassay |
| CRTP | Cortisol, PM | Electrochemiluminescence Immunoassay |
| SALCOR | Cortisol, Saliva | — |
| CRTSL | Cortisol, Serum Free | — |
| CRTSF | Cortisol, Serum Free with CBG | HPLC/Tandem Mass Spectrometry; Radioimmunoassay (RIA); calculation of free cortisol |
| UCOR | Cortisol, Urine Free | — |
| COTSCU | Cotinine Screen, Urine | — |
| COV19P | COVID 19 by RT-PCR | — |
| COVNAT | COVID-19 IgG, Qual by CIA (Natural Infection Response) | — |
| COW | Cow Hair/Dander IgE | — |
| QFGM | Coxiella burnetii (Q Fever) Antibodies, IgG & IgM, Phase I/II w/Reflex to Titer | — |
| CBBRP | Coxiella burnetti (Q fever), Molecular Det, PCR, Blood | — |
| COXSAP | Coxsackie A Antibodies (Serotypes 2, 4, 7, 9, 10 & 16) | — |
| COXS | Coxsackie B Virus Antibodies | — |
| CRAB | Crab IgE | — |
| CRDPU | Creatine Disorders Panel, Urine | — |
| CRTE | Creatine, Serum | — |
| CRET | Creatinine | Kinetic Colorimetric Jaffé Method |
| CRCL | Creatinine Clearance | Kinetic Colorimetric Assay |
| UCRE | Creatinine Urine, Random | Kinetic Colorimetric Assay |
| TCRE | Creatinine Values, 24 Hr. Urine | Kinetic Colorimetric Assay |
| CRETBF | Creatinine, Body Fluid | Kinetic Colorimetric Jaffé Method |
| CRPC | CRP, Cardiac | Particle-Enhanced Immunoturbidimetric Assay |
| CRFR | Cryofibrinogen | — |
| CRYR | Cryoglobulin | — |
| CRYQR | Cryoglobulin Qual w/reflex to IFE Typing & Quant IgA, IgG, IgM | — |
| CRYQ | Cryoglobulin w/reflex to Quant IgA, IgG, IgM | — |
| CRAG | Cryptococcal Antigen | — |
| CACR | Cryptococcal Antigen, CSF | — |
| CSDM | Cryptosporidium and Coccidia Exam, Fecal | — |
| CRYSPOR | Cryptosporidium Antigen by EIA | — |
| CCT | CSF Cell Count and Differential | — |
| CSFCU | CSF Culture | — |
| CULTAER | Culture, Aerobic w/Gram Stain | — |
| CULTAA | Culture, Aerobic/Anaerobic Culture | — |
| CULTGAS | Culture, Group A Strep | — |
| CULTGBS | Culture, Group B Strep | — |
| CULTURN | Culture, Urine | — |
| CURVUL | Curvularia lunata IgE | — |
| CIAS | Cutaneous Immunofluorescence Ab (IgG & IgG4), Serum | — |
| CYAN | Cyanide | — |
| CCP | Cyclic Citrullinated Peptide Antibody, IgG | — |
| CCPAG | Cyclic Citrullinated Peptide Antibody, IgG and IgA | — |
| CSNL | Cycloserine Level | — |
| CLBR | Cyclosporine | — |
| CYFRA | CYFRA 21-1 (Cytokeratin 19 Fragment) Serum | — |
| CMBLT | Cymbalta Level (Duloxetine) | — |
| CYSTC | Cystatin C | — |
| CFVAR | Cystic Fibrosis (CFTR) 165 Pathogenic Variants | — |
| CFTRDD | Cystic Fibrosis (CFTR) 165 w/reflex to Seq & Del/Dup | — |
| CYSIGG | Cysticercosis Antibody, IgG | — |
| CYSIGGCSF | Cysticercosis Antibody, IgG, CSF | — |
| CSQU | Cystine Quantitative, 24 Hr. Urine | — |
| CYPGP | Cytochrome P450 Genotyping Panel | — |
| CYTOP | Cytokine Panel 13, Serum | — |
| CMVQB | Cytomegalovirus (CMV) DNA Detection & Quantitation, Blood | — |
| CMVDO | Cytomegalovirus (CMV) DNA Detection, Other (patients >=21 days old) | — |
| CMVQO | Cytomegalovirus (CMV) Quantitative PCR | — |
| CMV | Cytomegalovirus Antibody (CMV), IgG | — |
| CMMQ | Cytomegalovirus Antibody (CMV), IgM | — |
| CMGA | Cytomegalovirus IgG Avidity, ELISA | — |
