- C-Peptide

- C-Reactive Protein

- C. diff

- C. difficile Toxin

- C1 Esterase Inhibitor, Protein, Quantitation

- C1q

- C3

- C4

- Ca

- CA 125

- CA 19-9

- CA 27.29

- CA-125

- CA125

- Calcitonin

- Calcium (Urine)

- Calcium, Free (Blood)

- Calcium, Total (Serum)

- Canavan's Disease Mutation Analysis

- Carbamazepine

- Carbon Dioxide (Serum)

- Carbon Dioxide (Urine)

- Carbon Dioxide, Partial Pressure (Blood)

- Carboxyhemoglobin

- Carcinoembryonic Antigen

- Carotene

- Cat scratch disease

- Catecholamines, Urine

- CBC

- CD4

- CD8

- CEA

- Cell Count and Differential (Body Fluid)

- Cell Count and Differential (Cerebrospinal Fluid)

- Ceruloplasmin

- CH50 (Complement, Total)

- Chem 7

- Chimerism/Engraftment Test

- Chlamydia Culture

- Chlamydia PCR

- Chlamydia trachomatis Nucleic Acid Amplification

- Chloride (Serum)

- Chloride (Urine)

- Cholesterol, HDL

- Cholesterol, LDL

- Cholesterol, Total

- Christmas Factor

- Chromosome

- Chromosome Analysis (Amniotic Fluid)

- Chromosome Analysis (Bone Marrow/Leukemic Blood)

- Chromosome Analysis (Chorionic Villus)

- Chromosome Analysis (Cord Blood, PUBS or Neonate)

- Chromosome Analysis (Non-Leukemic Peripheral Blood)

- Chromosome Analysis (Tissue)

- Chymotrypsin, Stool

- CK

- CK Isoenzymes

- CK-MB

- Cl

- Clonazepam

- Clorazepate

- Clostridium difficile Toxin A+B EIA

- Clostridium difficile Toxin B Cytotoxicity Assay

- CMV

- CMV

- CMV Antibody

- CMV Antigen

- CMV Antigenemia

- CMV Buffy Coat

- CMV PCR (CSF)

- CO2

- Cocaine

- Coccidiodes culture

- Coccidioides immitis antibody

- Cold Agglutinin Evaluation

- Collagen Cross-Linked N-telopeptide

- Collagen Type I C-Telopeptide

- Complement, Total

- Complete Blood Count

- Complete Blood Count with Differential

- Conjugated Bilirubin

- Coombs test

- Copper (Serum)

- Copper (Urine)

- Cord Blood, Neonatal

- Corticotropin Releasing Hormone

- Cortisol (Serum)

- Cortisol (Urine)

- CPK

- CPK Isoenzymes

- CPK-MB

- Creatine Kinase

- Creatine Kinase - MB

- Creatinine (Serum)

- Creatinine (Urine)

- Creatinine Clearance

- CRH

- Crossmatch

- CRP

- Cryofibrinogen

- Cryoglobulin Panel

- Cryptococcal Antigen (Cerebrospinal Fluid)

- Cryptococcal Antigen (Serum)

- Cryptosporidium

- Cryptosporidium / Giardia (DFA)

- Crystal examination

- CSF

- CSF IgG Ratio/Index

- CSF PEP

- CTx

- Culture Blood

- Culture, Anaerobic

- Culture, Aspirate

- Culture, Biopsy/Tissue

- Culture, Blood Bag Fluid

- Culture, Blood, for Dimorphic Fungi and Mycobacteria

- Culture, Blood, Neonate

- Culture, Blood, Routine

- Culture, Body Fluid

- Culture, Bone Marrow

- Culture, Brucella

- Culture, Campylobacter

- Culture, Catheter or Line

- Culture, Cerebrospinal Fluid

- Culture, Chlamydia trachomatis

- Culture, Cytomegalovirus

- Culture, Dialysis Fluid

- Culture, Ear / Eye

- Culture, Enterovirus

- Culture, Fungal

- Culture, Fungal, Hair/Skin/Nail

- Culture, Genital

- Culture, Genital, for Staphylococcus aureus (TSS)

- Culture, Genital, for Yeast vaginitis

- Culture, Group B Strep

- Culture, Herpes Simplex Virus (HSV)

- Culture, Legionella

- Culture, Malassezia furfur

- Culture, MRSA Screen

- Culture, Mycobacterial

- Culture, Mycoplasma/Ureaplasma

- Culture, Nocardia

- Culture, Nose/Nasal/Nares

- Culture, r/o GC Only

- Culture, Respiratory (Bronchial Brush)

- Culture, Respiratory (Bronchial Washings)

- Culture, Respiratory (Bronchoalveolar Lavage)

- Culture, Respiratory (Endotracheal Lavage)

- Culture, Respiratory (Sputum)

- Culture, Respiratory (Throat)

- Culture, Respiratory (Tracheal Aspirate)

- Culture, Respiratory Viruses

- Culture, Staph aureus Screen

- Culture, Stool (Neonate Fecal Swab)

- Culture, Stool (Routine)

- Culture, Stool, E coli 0157:H7

- Culture, Stool, Vibrio

- Culture, Stool, Yersinia

- Culture, Throat

- Culture, Urine (Prostatic Massage)

- Culture, Urine (Routine)

- Culture, Urine (Sterile Site)

- Culture, Varicella-Zoster Virus

- Culture, Virus (Unspecified)

- Culture, VRE Screen

- Culture, Wound (Swab)

- Cyanocobalamin

- Cyclospora Smear

- Cyclosporine

- Cystic Fibrosis Mutation by PCR

- Cystine

- Cytomegalovirus (CMV) IgG Antibody

- Cytomegalovirus (CMV) IgG/IgM Antibody Panel

- Cytomegalovirus (CMV) viral load

- Cytomegalovirus Antigenemia

- Cytomegalovirus Early Antigen

- Cytomegalovirus PCR (CSF)