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QUEST AD-Detect Amyloid Beta 42/40

Blood-based biomarker testing may help identify patients who are candidates for early antibody treatment.

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QUEST AD-Detect Amyloid Beta 42/40

Blood-based biomarker testing may help identify patients who are candidates for early antibody treatment.

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Clinical Insights Companion

Quanum Lab Services Manager

Order lab tests for your patients

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Real-time Priority and STAT results via Quest Lab Alert for Physicians

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Quanum Lab Services Manager

Order lab tests for your patients

View patient’s lab test results
Order supplies, access Lab Utilization Reports, and more!
Real-time Priority and STAT results via Quest Lab Alert for Physicians

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Clinical Insights Companion

View longitudinal lab trends across time and conditions
Assist in identifying care gaps and emerging clinical patterns
Consolidate lab history from multiple sources in one unified view
Support more informed clinical decisions and follow-ups

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Clinical Insights Companion

View longitudinal lab trends across time and conditions
Assist in identifying care gaps and emerging clinical patterns
Consolidate lab history from multiple sources in one unified view
Support more informed clinical decisions and follow-ups

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Clinical experts & education

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Solutions for hospital lab managers

The tools and services to make your lab more efficient and optimize patient care.

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Solutions for hospital lab managers

The tools and services to make your lab more efficient and optimize patient care.

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Collaborations that power better care

Learn about our relationships and collaborations with academic hospitals on a wide variety of medical and scientific research.

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Collaborations that power better care

Learn about our relationships and collaborations with academic hospitals on a wide variety of medical and scientific research.

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Explore the Test Directory

Our Test Directory includes detailed information, guides, and references for many of our tests.

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Explore the Test Directory

Our Test Directory includes detailed information, guides, and references for many of our tests.

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Identify liver disease risk

Determine which patients are at risk for NAFLD and NASH with the ELF™ Score.

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Identify liver disease risk

Determine which patients are at risk for NAFLD and NASH with the ELF™ Score.

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Let’s improve patient and hospital health—together

Learn about innovative solutions and the latest advances in the diagnostic space that may be beneficial to your health system.

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Let’s improve patient and hospital health—together

Learn about innovative solutions and the latest advances in the diagnostic space that may be beneficial to your health system.

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Solutions for lab managers

The tools and services to make your lab more efficient and optimize patient care.

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Solutions for lab managers

The tools and services to make your lab more efficient and optimize patient care.

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Employers

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Employers

Drug screening

International drug testing

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Employer population health

Empower better employee health with convenient care driven by clinical insights
Increase access to high quality healthcare to manage and prevent costly chronic conditions

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Employer population health

Empower better employee health with convenient care driven by clinical insights
Increase access to high quality healthcare to manage and prevent costly chronic conditions

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Workforce drug screening

• Employers should make careful determinations about the drug screening program elements most beneficial for their workplace

• We provide flexible solutions to help empower workplace safety in a variety of circumstances

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Workforce drug screening

• Employers should make careful determinations about the drug screening program elements most beneficial for their workplace

• We provide flexible solutions to help empower workplace safety in a variety of circumstances

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Health plans

Improve quality outcomes

Manage lab spend

Promote member engagement

Health plans

Improve quality outcomes

Manage lab spend

Promote member engagement

Lab spend optimization

Detect and reduce unnecessary lab costs, while preserving quality and service for health plan members and providers.

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Lab spend optimization

Detect and reduce unnecessary lab costs, while preserving quality and service for health plan members and providers.

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Health plan lookup tool

Millions of health plan members have a stronger network. Find out if Quest is in-network for your health plan.

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Health plan lookup tool

Millions of health plan members have a stronger network. Find out if Quest is in-network for your health plan.

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You can count on the domain expertise of our team of 650+ medical, scientific, and regulatory thought leaders to help you apply insight to data and make more informed decisions.

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Discovery

You can count on the domain expertise of our team of 650+ medical, scientific, and regulatory thought leaders to help you apply insight to data and make more informed decisions.

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Clinical trials

Our comprehensive test menu and assay development lab services can support your clinical trials in countries around the world and are tailored to your program and requirements.

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Clinical trials

Our comprehensive test menu and assay development lab services can support your clinical trials in countries around the world and are tailored to your program and requirements.

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Commercialization

A successful launch starts with broad access. Support your commercial effectiveness with co-developed biomarker education materials and de-identified alerts on biomarker populations.

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Commercialization

A successful launch starts with broad access. Support your commercial effectiveness with co-developed biomarker education materials and de-identified alerts on biomarker populations.

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Other industries served

Life insurers

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Accountable care organizations

Corrections

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Other industries served

Life insurers

Pain clinics

Community health centers

Accountable care organizations

Corrections

Enterprise Organization

Empowering better health through diagnostic insights

We’re helping Community health centers improve the engagement and health of their communities by providing access to efficient, high-quality, comprehensive health care, regardless of financial, geographic, or social barriers.

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Empowering better health through diagnostic insights

We’re helping Community health centers improve the engagement and health of their communities by providing access to efficient, high-quality, comprehensive health care, regardless of financial, geographic, or social barriers.

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Delivering sustainable change in quality and outcomes

We work with ACOs to achieve better care for patients and better health for the population, through the delivery of high-quality, integrated, affordable health care.

Find out how

Delivering sustainable change in quality and outcomes

We work with ACOs to achieve better care for patients and better health for the population, through the delivery of high-quality, integrated, affordable health care.

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Get tested

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Testing for conditions

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Clinical trials

Quest Mobile™

Back

Billing and insurance

Understand the cost of care

Insurance

Financial assistance

Self-pay price estimate

Indiana’s Shoppable Services

Billing and insurance

Understand the cost of care

Insurance

Financial assistance

Self-pay price estimate

Indiana’s Shoppable Services

Back

Results

Access your test results

Family test results

FAQ: Understanding test results

Results

Access your test results

Family test results

FAQ: Understanding test results

Back

Test Directory

Tests by specialty

Specimen handling

Priority value table

Test Directory

Tests by specialty

Specimen handling

Priority value table

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About our tests

Allergy & asthma

Arthritis

Autoimmune diseases

Bleeding & thrombosis

Cancer

Cardiovascular disease

Chronic kidney disease

Clinical drug monitoring

Diabetes & pre-diabetes

See all >

About our tests

Allergy & asthma

Arthritis

Autoimmune diseases

Bleeding & thrombosis

Cancer

Cardiovascular disease

Chronic kidney disease

Clinical drug monitoring

Diabetes & pre-diabetes

See all >

Back

Billing & coding

Commercial coverage & coding guidelines

Medicaid limited coverage policies

Medicare coverage & coding guides

Electronic billing

Z-codes

Billing & coding

Commercial coverage & coding guidelines

Medicaid limited coverage policies

Medicare coverage & coding guides

Electronic billing

Z-codes

Back

Lab tools & IT systems

Quanum Lab Services Manager

Clinical Insights Companion

Lab tools & IT systems

Quanum Lab Services Manager

Clinical Insights Companion

Back

Clinical experts & education

Clinical Education Center

Clinical experts & education

Clinical Education Center

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Lab tests by specialty

Clinical drug monitoring

Infectious diseases and immunology

Cardiometabolic, endocrine and wellness

Lab tests by specialty

Oncology

Genetics

Neurology

Women's health

Clinical drug monitoring

Infectious diseases and immunology

Cardiometabolic, endocrine and wellness

Back

Hospitals & health systems

Collaborative lab solutions

Outreach partnerships

Diagnostic excellence

Academic collaboration

Population health

Enterprise content management

Transplant testing

Hospitals & health systems

Collaborative lab solutions

Outreach partnerships

Diagnostic excellence

Academic collaboration

Population health

Enterprise content management

Transplant testing

Back

Employers

Drug screening

International drug testing

Lab spend management

Employer population health

Employers

Drug screening

International drug testing

Lab spend management

Employer population health

Back

Health plans

Improve quality outcomes

Manage lab spend

Promote member engagement

Health plans

Improve quality outcomes

Manage lab spend

Promote member engagement

Manage Appointments with MyQuest

Don't have a MyQuest account?

Back

Life sciences

Life sciences

Pharma

Biotech

CROs

MedTech

Academic

Back

Other industries served

Life insurers

Pain clinics

Community health centers

Accountable care organizations

Corrections

Enterprise Organization

Other industries served

Life insurers

Pain clinics

Community health centers

Accountable care organizations

Corrections

Enterprise Organization

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Quest^® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services. Other affiliates operated under the Quest^® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services.

Quest^®, Quest Diagnostics^®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—^® and ™—are the property of their respective owners. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only. May include AI-generated and/or AI-modified imagery.