Quest Diagnostics
Quest Diagnostics: Trusted Leader in Lab Testing and Health Insights
Quest Diagnostics is one of the most recognized names in diagnostic healthcare. Offering over 3,500 high-quality lab tests, Quest empowers patients, healthcare providers, and employers with reliable, fast, and actionable health information. Whether you're looking for routine blood work or advanced diagnostics, Quest delivers accurate results you can trust.
Why Choose Quest Diagnostics?
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Extensive Test Menu: 3,500+ diagnostic tests covering routine, specialty, genetic, and molecular diagnostics
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Nationwide Reach: 1 in 3 Americans use Quest services each year
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Workplace Drug Testing: A trusted name in compliant and accurate employer screening
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Data-Driven Innovation: Backed by the world’s largest health database—over 60 billion data points
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Fast Turnaround: Most test results delivered within 24–72 hours
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Flexible Testing Options: In-lab, in-home, and mobile phlebotomy services available
Popular Lab Test Categories
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Routine Blood Tests: CBC, CMP, lipid panels, glucose, A1c, vitamin D
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Advanced Diagnostics: Genetic testing, cancer screenings, anatomic pathology
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Drug & Alcohol Testing: Urine, oral fluid, hair testing for DOT and non-DOT settings
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Preventive Health: Hormone panels, allergy testing, wellness screenings
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Infectious Disease Testing: COVID-19, STDs, flu, and more
Accurate Results for Better Health Decisions
Quest ensures standardized testing procedures across all locations—whether you visit a patient service center, use in-home collection, or access mobile services. Every sample is handled with precision to deliver clinically reliable results, fast.
Innovation That Powers Personalized Care
Quest Diagnostics is leading the future of healthcare with:
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AI & Machine Learning: Enhancing diagnostic accuracy
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Genomic Testing: Supporting personalized medicine
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Predictive Analytics: Identifying health trends and improving public health responses
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Partnerships with the CDC: Contributing to national and global health initiatives
Workplace Drug Testing You Can Trust
Quest is a leader in workplace health and safety with drug testing programs that are compliant, reliable, and legally defensible.
Drug Testing Services:
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Urine Testing: The industry standard
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Oral Fluid Testing: Detects recent drug use
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Hair Testing: Provides long-term detection
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Specimen Validity Testing: Ensures sample integrity and accuracy
Employer Benefits:
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Reduce health risks
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Improve safety and productivity
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Comply with federal and industry regulations
Quest Mobile: In-Home Lab Testing Made Easy
Can’t make it to a lab? Quest Mobile brings lab testing to your door.
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Convenient Scheduling: From home or work
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Secure Collection: Professional mobile phlebotomists
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Quick Turnaround: Results in 24–72 hours
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HIPAA-Compliant: Privacy and safety assured
Supporting Public Health and Research
With over 60 billion test results, Quest supports:
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Disease surveillance and early outbreak detection
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Epidemiological research
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Development of targeted treatments
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Health equity through data-driven insights
Start Your Journey to Better Health with Quest Diagnostics
Whether you're monitoring chronic conditions, getting a yearly check-up, or taking control of your wellness, Quest Diagnostics provides accurate lab testing to guide your health journey.
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Popular test panels by Quest Diagnostics:
Detect possible allergic responses to various substances in the environment and evaluate for hay fever, asthma, atopic eczema, and respiratory allergy. The quantitative allergen-specific IgE test is indicated: (1) to determine whether an indivi
Learn moreAmino Acid Analysis
Amino Acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to: - phenylketonuria - tyrosinemia - citrullinemia - non-ketotic hyperglycinemia - maple syrup urine di
Learn moreAmino acid analysis is necessary for the diagnosis of a variety of inborn errors of metabolism. These include, but are not limited to: - phenylketonuria, tyrosinemia, citrullinemia, non-ketotic hyperglycinemia, maple syrup urine
Learn moreThe Anaplasma phagocytophilum and Ehrlichia chaffeensis Antibody Panel is a comprehensive serological test used to diagnose infections caused by these two tick-borne pathogens. Anaplasma phagocytophilum is responsible for anaplasmosis, while Ehrlichi
Learn moreCatecholamines, Fractionated, Random Urine is a test that measures the levels of certain hormones called catecholamines in a random urine sample. Catecholamines are a group of hormones and neurotransmitters that include substances like epinephrine (a
Learn moreCell Count and Differential, Synovial Fluid
What Is Synovial Fluid? Synovial fluid is the thick liquid that lubricates your joints and keeps them moving smoothly. It’s on all of your joints, including in your knees, shoulders, hips, hands, and feet. What Is a Synovial Fluid Analysi
Learn moreThe Chlamydia/Chlamydophila Antibody Panel 3 (IgG, IgA, IgM) is a comprehensive serological test used to detect antibodies against Chlamydia and Chlamydophila species in a patient's blood. This panel tests for three types of antibodies: Immunoglo
Learn moreSalivary cortisol level, particularly late-night salivary cortisol (LNSC) level, is useful in screening for endogenous Cushing syndrome. Two or more positive results of LNSC tests may be used to confirm Cushing syndrome. LNSC measurement may also be
Learn morePrimarily for research and to support attempts to understand the pathogenesis of immune, infectious, allergic, or inflammatory disorders.
Learn moreSjögren syndrome is an autoimmune disease characterized by lymphocyte infiltration of exocrine glands, which manifests as dry eyes and mouth. The syndrome is estimated to be between 9 and 20 times more common in women than in men and typically p
Learn moreThe Ehrlichia Chaffeensis (IgG, IgM) panel is a critical diagnostic tool used for detecting Ehrlichiosis, a bacterial illness transmitted by ticks. This panel tests for both IgG and IgM antibodies against Ehrlichia chaffeensis, the bacterium responsi
Learn moreFood Allergy Panel
The Food Allergy Panel test measures immunoglobulin E (IgE) antibodies in the blood, which are produced in response to specific food allergens. This panel evaluates immune responses to the following foods: almond, cashew nut, codfish, cow's milk,
Learn moreThe Hu Antibody Screen with Reflex to Titer and Western Blot (WB) panel is a specialized diagnostic test crucial for detecting paraneoplastic neurological syndromes, particularly small cell lung cancer-related disorders. This test is designed to iden
Learn moreThe ImmunoCAP Specific IgE blood test, offered by Quest Diagnostics, is a highly specialized diagnostic tool used to detect specific IgE antibodies in the blood, which are associated with allergic reactions. This test is pivotal in the accurate ident
Learn moreThe Kappa/Lambda Light Chain, Free w/Ratio, Random Urine panel from Quest Diagnostics is a crucial diagnostic test for detecting and monitoring multiple myeloma and other disorders related to abnormal or excessive production of immunoglobulin light c
Learn moreThe Metals Acute Poisoning Panel, Blood (CSA) offered by Quest Diagnostics is a laboratory test designed to detect and measure the presence of various heavy metals in the blood, which can indicate acute poisoning. This panel includes the analysis of
Learn moreThe Mold Allergy Panel detects immunoglobulin E (IgE) antibodies in the blood, which are produced in response to specific mold allergens. This test evaluates immune responses to five common molds associated with allergies: Alternaria alternata, Asper
Learn moreOmega-3 and omega-6 fatty acids are polyunsaturated long chain fatty acids (PUFA) required by the body for proper functioning, normal growth and the formation of neural synapses and cellular membranes. Omega-3 and -6 fatty acids are considered &ldquo
Learn moreThis test is intended for the diagnosis and monitoring of inherited disorders affecting multiple metabolic pathways. Organic acidurias are inherited disorders resulting from a deficient enzyme or transport protein. Although most are autosomal rece
Learn morePFAS (Forever Chemicals) 9 Panel by Quest Diagnostics The PFAS (Forever Chemicals) 9 Panel by Quest Diagnostics is a comprehensive blood test designed to measure the levels of 9 specific PFAS chemicals in the body. PFAS, also known as "foreve
Learn moreThis test is used to analyze the protein content in urine. The proteins are separated into 5 major components: albumin, alpha-1, alpha-2, beta, and gamma. Interpretation of elevations, decreases, or visual changes in different components and/or assoc
Learn moreThe test panel comprising Protein, Total and Protein Electrophoresis, 24 Hour Urine, and Immunofixation is an important diagnostic tool used in medical laboratories to assess and monitor various health conditions. The Total Protein test measures the
Learn moreThe "Quest Diagnostics" category encompasses a wide array of medical laboratory tests and markers typically performed by Quest Diagnostics, a leading laboratory services provider. This category includes tests ranging from routine blood and
Learn moreQuest Diagnostics provides essential urine marker tests, which are vital for diagnosing and monitoring a range of health conditions. These non-invasive tests detect substances in urine that indicate diseases such as diabetes, kidney disease, and infe
Learn moreThe Ri Antibody Screen with Reflex to Titer and Western Blot is a diagnostic panel offered by Quest Diagnostics, designed to detect the presence of Ri antibodies in the blood. Ri antibodies are autoantibodies, meaning they are produced by the body
Learn moreSensory-motor neuropathies may occur by various mechanisms. These include development of autoantibodies to neuronal structures such as myelin associated glycoprotein (MAG) antibody, Hu antibody, and the ganglioside antibodies. Sensory-motor neurop
Learn moreTree Nut Allergen Panel
The Tree Nut Allergy Test Panel measures the levels of specific IgE antibodies in your blood to specific peanut and tree nut allergens. This panel measures responses to almond, Brazil nut, cashew nut, hazelnut, macadamia nut, peanut, pecan nut, pista
Learn moreUrinalysis, complete
Dipstick urinalysis is important in accessing the chemical constituents in the urine and the relationship to various disease states. Microscopic examination helps to detect the presence of cells and other formed elements.
Learn moreThe YO AB Screen with Reflex to Titer and Western Blot (WB), Serum, is a specialized diagnostic panel primarily used for detecting paraneoplastic neurological syndromes, particularly in the context of suspected ovarian or breast cancer. This test scr
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