| CDIFD | C Diff PCR w/reflex |
| CPT | C Peptide |
| CRP | C Reactive Protein |
| 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 |
| UCA | Calcium Urine, Random |
| TCA | Calcium, 24 Hr. Urine |
| CLPTN | Calprotectin, Stool |
| CALR | CALR Exon 9 Mutation Analysis |
| CAMPY | Campylobacter Stool Culture |
| C272 | Cancer Antigen - CA 27.29 |
| C125 | Cancer Antigen 125 |
| C12M | Cancer Antigen 125 Serial Monitor |
| CAQT | Candida albicans Antibodies, IgG, IgM, IgA |
| CAURS | Candida auris PCR w/reflex to culture |
| 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 |
| COV | Carbon Monoxide (Carboxyhemoglobin) |
| CEAS | Carcinoembryonic AG |
| CEAFL | Carcinoembryonic Antigen, Fluid |
| CARPP | Cardiac Panel |
| ACABP | Cardiolipin Antibodies, IgG and IgM |
| 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) |
| CHLPAP | Chlamydia Antibody Panel, IgG & IgM by IFA |
| CPGMA | Chlamydia pneumoniae IgG, IgM, IgA |
| CGAMD | Chlamydia trachomatis & N. gonorrhoeae, TMA, Eye Only |
| CTCU | Chlamydia trachomatis Culture |
| CTLGV | Chlamydia trachomatis L serovars (LGV) by PCR |
| CGMG | Chlamydia/Gonococcus/Mycoplasma genitalium, NAA, Urine |
| CL | Chloride |
| FCHL | Chloride, Body Fluid |
| TCLL | Chloride, Urine, 24 Hr. |
| UCLL | Chloride, Urine, Random |
| CHOCLT | Chocolate, IgE |
| YFCCK | Cholecystokinin (CCK) |
| CHOL | Cholesterol |
| CHOLF | Cholesterol, Body Fluid |
| 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 |
| 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 |
| 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 |
| 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 |
| COV19 | Coronavirus PCR |
| CBGR | Corticosteroid Binding Globulin |
| CRT | Cortisol |
| CRTA | Cortisol, AM |
| CRTP | Cortisol, PM |
| SALCOR | Cortisol, Saliva |
| CRTSL | Cortisol, Serum Free |
| CRTSF | Cortisol, Serum Free with CBG |
| UCOR | Cortisol, Urine Free |
| COTSCU | Cotinine Screen, Urine |
| 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 |
| CRCL | Creatinine Clearance |
| UCRE | Creatinine Urine, Random |
| TCRE | Creatinine Values, 24 Hr. Urine |
| CRETBF | Creatinine, Body Fluid |
| CRPC | CRP, Cardiac |
| 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 |
| 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 |
