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Lab tests guide
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C-ANCA measurement
This test measures the amount of antineutrophil cytoplasmic antibodies in blood. These antibodies may be found inside neutrophils and monocytes (types of white blood cells). Thi...
C3 complement assay
This test measures the amount of complement 3 (C3) in blood[1]. Complement 3 is part of the body's immune system. This test is used when a deficiency of C3 is suspected[2].
C4 complement assay
This test measures complement C4 in the blood. Complement C4 is a part of the body's immune system. This test is used to evaluate and manage conditions that involve inflammation...
CA 125 measurement
This test measures the amount of CA 125 in the blood. CA 125 is a tumor marker. This test is used to help monitor the clinical course of endometrial or ovarian cancer[1].
CA 27.29 measurement
This test measures the amount of CA 27.29 in blood. CA 27.29 is a tumor marker used to monitor the clinical course of breast cancer[1].
CMV rapid culture
This test is used for a quick detection of a virus called cytomegalovirus (CMV). A sample of urine or a sample of saliva may be collected for this test[1][2]. This test is used ...
CSF albumin/plasma albumin ratio measurement
This test compares the amount of albumin (a blood protein) in blood to the amount of albumin in cerebrospinal fluid. It is used to determine how well the blood-brain barrier is ...
CSF: angiotensin-converting enzyme level
This test measures angiotensin-converting enzyme in cerebrospinal fluid[1].This test is used to help diagnose a disease called neurosarcoidosis[2].
Cadmium measurement, urine
This test detects a metallic element called cadmium in urine. It is used to evaluate and manage cadmium exposure[1][2][3][4][5][6].
Calcium, serum, ionized measurement
This test detects the active portion of calcium (a mineral) in blood. It is used to evaluate and manage metabolic and endocrine disorders, such as hyperparathyroidism[1][2] and ...
Cancer antigen 15-3 measurement
This test measures the presence and amount of cancer antigen 15-3. This test is uses a tumor marker[1][2][3] to help monitor patients with breast cancer[4][5][6][7]. A sample of...
Cancer antigen 19-9 measurement
This test measures the carbohydrate antigen 19-9 in blood. It is used for the evaluation and treatment of malignant disease[1][2][3]. This test may be used when cancer of the pa...
Candida antigen assay
This test detects the presence of the Candida antigen in blood. This test is used to detect a condition called disseminated candidiasis[1][2][3][4][5].
Carbamazepine blood measurement
This test measures the amount of an anti-seizure drug called carbamazepine in blood. It is used to monitor blood levels of carbamazepine during treatment or when an overdose is ...
Carbamazepine-10,11-epoxide measurement
This test measures the amount of carbamazepine-10,11-epoxide in blood. This is a by-product of the body's breakdown of an anti-seizure drug called carbamazepine. This test is us...
Carbamazepine-10,11-epoxide measurement
This test measures the amount of carbamazepine-10,11-epoxide in blood. This is a by-product of the body's breakdown of an anti-seizure drug called carbamazepine. This test is us...
Carbon dioxide content measurement
This test measures the amount of total carbon dioxide (TCO2) in blood[1]. This test is used when acid-base imbalances are suspected in the body. This imbalances may include resp...
Carboxyhemoglobin measurement
This test measures the amount of carboxyhemoglobin (carbon monoxide and hemoglobin) in blood. It is used to diagnose and manage carbon monoxide poisoning[1].
Carcinoembryonic antigen measurement, pleural fluid
This test measures carcinoembryonic antigen in pleural fluid[1][2][3][4]. This test is used when malignant pleural effusion is suspected[2][1][3][4].
Carcinoembryonic antigen measurement, serum
This test measures the amount of carcinoembryonic antigen (CEA) in blood. It is used to diagnose and manage certain types of cancer[1][2][3].
Cardiac injury panel
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Catecholamines, fractionation measurement, urine
This test measures the level of catecholamines in urine. These catecholamines include epinephrine, norepinephrine, and dopamine, which are hormones produced by the adrenal gland...
Cerebrospinal fluid IgG measurement, quantitative
This test measures the level of immunoglobulin G (IgG) in cerebrospinal fluid. Immunoglobulin G is a type of antibody. This test is used to evaluate brain and spinal cord diseas...
Cerebrospinal fluid culture
This test detects organisms in cerebrospinal fluid. It is used to diagnose or rule out bacterial meningitis[1].
Cerebrospinal fluid oligoclonal bands
This test uses a laboratory process called electrophoresis to detect the different protein components in cerebrospinal fluid[1]. This test is used to evaluate certain disorders ...
Chlamydia trachomatis culture
This test detects and isolates a type of bacteria called Chlamydia trachomatis from a culture of cells collected from the surface of certain areas of the body. This test is used...
Chlamydia trachomatis nucleic acid amplification test
This test detects bacterial DNA gene sequences in certain body fluids. This test is used when an infection with a bacteria called Chlamydia trachomatis is suspected in the urina...
Chlamydia trachomatis nucleic acid hybridization test
This test checks for gene sequences in bacterial DNA. It is used to help diagnose infections caused by the Chlamydia trachomatis bacteria[1][2].
Chloride measurement, urine
This test measures the amount of chloride in urine. It is used to evaluate and manage acid-base, fluid, and electrolyte imbalances[1][2].
Chorionic gonadotropin measurement, qualitative
This test detects the presence of a hormone called human chorionic gonadotropin (hCG) in blood. This test is used when pregnancy is suspected[1][2][3].
Chromium measurement
This test measures the amount of chromium in blood. It is used to evaluate and manage chromium exposure or poisoning, and chromium deficiency[1][2][3].
Chromium measurement, urine
This test measures the amount of chromium, a mineral, in urine. It is used to evaluate and manage exposure to chromium or a chromium deficiency[1][2][3][4][5][6][7][8].
Chromosome breakage assay
This test detects certain chromosome abnormalities in cells. It is used to evaluate for genetically-linked diseases, such as Fanconi's anemia.[1][2][3] A sample of venous blood,...
Chromosome breakage assay
This test detects certain chromosome abnormalities in cells. It is used to evaluate for genetically-linked diseases, such as Fanconi's anemia.[1][2][3] A sample of venous blood,...
Clomiphene test
This test measures follicle stimulating hormone (FSH) levels following administration of clomiphene, an antiestrogen medication. This test is used to evaluate a type of female i...
Clostridium botulinum culture
This test detects a type of bacteria called Clostridium botulinum. A sample of tissue or fluid from a wound, or a sample of stool may be collected for this test. Food may also b...
Clostridium botulinum toxin assay
This test detects the presence of Clostridium botulinum toxin. It is used to diagnose botulinum infection. A sample of blood, stool, emesis (vomit), or stomach contents may be c...
Clostridium difficile culture
This test detects bacteria (germs) called Clostridium difficile in stool. This test is used to diagnose a Clostridium difficile infection[1].
Clostridium difficile detection
This test detects Clostridium difficile (C. difficile) toxins in stool. C. difficile is a type of bacteria that produces two toxins, toxin A and toxin B. This test is used to di...
Clostridium difficile toxin assay
This test detects cytotoxins caused by bacteria (germs) called Clostridium difficile in stool. Cytotoxins are poisons that kill body cells. This test is used to diagnose a Clost...
Clot retraction, screen
This test measures the amount of time it takes for a blood clot to pull away from the walls of a test tube. It is used to evaluate and manage blood platelet disorders[1], includ...
Clotting factor V assay
This test measures the amount of factor V in blood. It is used to evaluate and manage bleeding and blood clotting disorders[1][2].
Clotting factor VII assay
This test measures the amount of factor VII in blood. It is used to help evaluate and manage certain types of blood-clotting disorders[1], such as Factor VII deficiency[2]. This...
Clotting factor X assay
This test measures the amount of factor X in blood. It is used to evaluate and manage a condition called factor X deficiency[1].
Clotting factor XI assay
This test measures the amount of factor XI (plasma thromboplastin antecedent) in blood. It is used to evaluate and manage blood-clotting disorders[1][2].
Clotting factor XII assay
The test measures the amount of factor XII in the blood. Factor XII is a protein that helps blood to clot. This test may be used when certain types of bleeding disorders are sus...
Coagulation factor assay
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Coagulation time, activated
This test measures the amount of time it takes for your blood to clot. This test may be used to monitor clotting time when heparin (a blood thinning medication) is used[1][2].
Cocaine measurement, Blood
This test measures the presence of cocaine, and the amount of its metabolites in blood. It is used to detect and monitor cocaine abuse or toxicity[1][2].
Cocaine measurement, urine
This test measures the amount or presence of cocaine and its metabolites in urine. It is used to detect and monitor cocaine abuse or toxicity[1][2].
Coccidioides immitis detection
This test detects antibodies to Coccidioides immitis in various body fluids. Coccidioides immitis is a type of fungus. This test is used when a condition called coccidioidomycos...
Cold agglutinin titer
This test detects antibodies that cause red blood cells to clump together in cold temperatures. It is used when conditions such as [1]Mycoplasma pneumonia[2], and cold autoimmun...
Collagen/Lupus panel
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Complement assay, total
This test measures total activity of complement in blood. A complement is a blood protein that is involved in immune and inflammatory responses in the body. This test is used to...
Complete blood count
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Complete blood count with automated differential
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Comprehensive metabolic panel
Laboratory panels (a set of tests) are done for many reasons. Panels may be performed for routine health screenings or if a disease or toxicity is suspected. Panels may be used ...
Copper measurement, serum
This test measures the amount of copper in blood. It is used to check for a deficiency or toxic level of copper in the body. This test is also used when disorders of copper meta...
Coproporphyrin I/coproporphyrin III fraction measurement
This test measures the amount of porphyrins in urine collected over 24 hours, stool, or blood. Porphyrins are substances produced in cells of the body. This test is used to help...
Cortisol measurement, free, urine
This test measures the amount of cortisol in urine. It is used to find and evaluate metabolic problems, such as Cushing's syndrome. This test may also be used to evaluate certai...
Corynebacterium diphtheriae culture
This test detects the presence of bacteria called Corynebacterium diphtheriae. These bacteria may be found in the throat, nose, and skin. This test is used when a disease called...
Corynebacterium diphtheriae throat culture
This test detects the presence of a bacteria called Corynebacterium diphtheriae in the throat. It is used when an infection of this bacteria is suspected. A sample of throat cel...
Cotinine measurement
This test measures the amount of cotinine (a product of nicotine breakdown) in blood. It is used to help evaluate suspected nicotine exposure and use[1][2][3].
Coxiella burnetii antibody level
This test measures antibodies in the blood to a bacteria called Coxiella burnetii, which causes Q fever. This test is used to evaluate and manage Q fever and related diseases[1]...
Coxsackievirus antibody level
This test measures the amount of antibodies to the coxsackie virus in blood. It is used to help diagnose a suspected coxsackie virus infection[1].
Creatine kinase MB isoenzyme/total creatine kinase ratio measurement
This test measures values of 2 muscle-injury related enzymes called creatine kinase and CK-MB. Using these values, a ratio is calculated to help distinguish skeletal muscle inju...
Creatine kinase MB measurement
This test measures the level of a specific muscle-injury related enzyme called CK-MB in blood. CK-MB may help to indicate heart muscle injury. This test is used to evaluate acut...
Creatinine measurement, 24 hour urine
This test measures creatinine (a product of protein breakdown) in urine and blood. It is used to determine glomerular filtration rate, which helps to measure how well the kidney...
Creatinine measurement, serum
This test measures the amount of creatinine in blood. Creatinine is a byproduct of muscle breakdown that the kidneys filter from blood. This test is used to assess kidney functi...
Cryptococcus species antigen assay
This test detects the antigen of a fungus called Cryptococcus neoformans in blood or cerebrospinal fluid. It is used to evaluate and manage cryptococcal meningitis[1][2].
Cyanide measurement, blood
This test measures the amount of cyanide in blood. It is used to detect intentional or accidental exposure to cyanide[1].
Cyclosporine measurement
This test measures the amount of a medicine called cyclosporine in blood. It is used for monitoring patients who are taking cyclosporine[1].
Cyst fluid cytology
This test uses a microscope to evaluate the cells of a fluid sample collected from a cyst. It is used to help diagnose lumps or masses as cancerous or non-cancerous. This test i...
Cystic fibrosis carrier detection
This test detects mutations in the cystic fibrosis transmembrane regulator (CFTR) gene[1][2]. This genetic test is used to help screen for cystic fibrosis[3][4]. A sample of blo...
Cystic fibrosis sweat test
This test measures the concentration of chloride in sweat from the body. This test is used to diagnose cystic fibrosis[1][2][3][4].
Cysticercosis antibody level
This test detects antibodies to a parasite called Taenia solium in blood or cerebrospinal fluid. This test helps to evaluate and manage neurocysticercosis, which is an infection...
Cytomegalovirus antigen assay
This test detects the antigen of a type of virus called cytomegalovirus (CMV). This test is used to diagnose infections caused by this virus.[1][2][3]. This test may be used whe...
Cytomegalovirus culture
This test detects a type of virus called cytomegalovirus (CMV) from a culture of certain body fluids.This test is used to diagnose suspected CMV infections[1][2][3]. It also hel...
Cytomegalovirus cytology
This test detects within cells evidence of a type of virus called cytomegalovirus (CMV) in urine or other body fluids or tissues. It is used to evaluate and manage CMV infection...
Cytomegalovirus nucleic acid assay, Qualitative
This test detects and measures the amount of nucleic acid (building blocks of genes) of a type of virus called cytomegalovirus (CMV). It is used to evaluate and manage infection...
Cytomegalovirus nucleic acid assay, Quantitative
This test measures the amount of a virus called cytomegalovirus (CMV) in certain body fluids. It is used to diagnose, evaluate, and manage infections caused by this virus. A sam...