Quest Diagnostics reviews: How comprehensive are its testing services?

For over 60 years, Quest Diagnostics has been a leader in the medical testing industry, offering everything from routine blood work and cholesterol checks to advanced cancer screenings and infectious disease testing. 

With thousands of locations across the U.S. and a reputation for accuracy, Quest Diagnostics is a go-to choice for millions of patients and healthcare providers seeking reliable diagnostic services.

Despite its vast offering, some patients have expressed concerns about billing practices, customer service delays, and long turnaround times. 

In this article, we will explore Quest Diagnostics reviews to provide a breakdown of its strengths and limitations and explain how its services compare to popular competitors.

Quest Diagnostics: An overview

Founded in 1967 by pathologist Paul Brown, Quest Diagnostics aimed to improve the accuracy and affordability of outpatient lab testing. Today, it has grown into one of the world’s largest diagnostic companies, operating in over 130 countries and processing millions of tests annually.

Quest Diagnostics offers 100 different types of tests, allowing patients to complete essential screenings in one place conveniently. Its portfolio includes:

• Routine blood work and wellness tests: Cholesterol, diabetes, metabolic panels, and general health screenings

• Infectious disease testing: COVID-19, flu, STDs, and other viral and bacterial infections

• Cancer screening and pathology: Tests that detect early cancer markers and aid in diagnosis

• Genetic testing: Assessing hereditary risks for numerous diseases, including cancer, cardiovascular conditions, and neurological disorders

One of the standout aspects of Quest Diagnostics is its growing focus on genetic testing. By using Next Generation Sequencing (NGS), it analyzes specific genetic regions to help identify potential health risks. While it doesn’t provide whole-genome insights, it can still help individuals understand hereditary conditions.

Quest Diagnostics tailors its services to four different groups:

1. Patients: Easy access to lab tests with or without a doctor’s order

2. Healthcare providers: A trusted partner for lab diagnostics and result interpretation

3. Employers: Workplace health screenings and drug testing programs

4. Laboratories: Advanced diagnostic solutions and data analytics support

By offering such a broad range of tests and services under one roof, Quest Diagnostics simplifies medical testing, making it more accessible, efficient, and insightful for both patients and medical professionals.

Bonus read — Check out our reviews of other providers of diagnostic testing services:

• Invitae genetic testing review

• Natera vs. Invitae

• Rupa Health review 

• Dante Labs reviews

Quest Diagnostics customer reviews: 6 key factors to consider

To better understand common customer concerns, our team created this Quest Diagnostic review based on six key factors people typically consider when choosing a medical testing company:

1. Quality assurance and accuracy 

2. Ease of ordering testing services 

3. Genetic testing options

4. Data privacy 

5. Customer service 

6. Prices and billing 

1. Quality assurance and accuracy

Regarding accuracy, reviews of Quest Diagnostics’ test results are mixed. The company claims that it adopts a three-pronged approach to quality assurance:

1. Pre-analysis: This ensures all lab samples are correctly matched with the individual they belong to, minimizing errors from the start.

2. Analysis: Quest Diagnostics follows strict industry protocols during this phase while conducting each medical test.

3. Post-analysis: This focuses on ensuring detailed documentation and reporting processes so patients and healthcare providers receive clear and actionable results. 

All of Quest Diagnostics’ major laboratories are CLIA-certified, and some hold ISO certifications, reinforcing its adherence to industry standards. Still, some users have reported inconsistencies in their results. One patient shared an experience where discrepancies in lab work made it difficult for their physician to interpret the findings properly.

Here’s what one Reddit user, who allegedly works at Quest Diagnostics, shared:

[Reddit](https://www.reddit.com/r/ChronicIllness/comments/1akxho9/comment/l9orrg6/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)

2. Testing options and ease of ordering

Quest Diagnostics offers a variety of accessible options to streamline the ordering process and user experience, such as:

• In-person appointment: Create a Quest Diagnostics account, select the test, and schedule an appointment in one of the recommended locations. 

• In-home sample collection: A Quest Mobile phlebotomist visits your home to collect your sample, which will then be sent to its labs for analysis. However, this option is only available in select locations. 

• Home collection kit: Purchase a collection kit, use it as instructed, and ship your sample to Quest Diagnostics for analysis.

• At-home test: Follow the instructions to collect the sample at home and get results online quickly. 

Source: Quest Diagnostics

Although these testing options are designed to make the ordering and testing process as seamless as possible, some users have expressed concerns, particularly about in-person appointments. For instance, several customers reported difficulty scheduling appointments at convenient locations, with the system suggesting testing centers farther away despite closer facilities being available. 

[Reddit](https://www.reddit.com/r/HealthInsurance/comments/1b8tzno/comment/lvs2jmf/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)

Additionally, while Quest Diagnostics does accept walk-ins, appointments are prioritized. This typically means walk-in customers face extended wait times. As a result, patients assigned to distant facilities often face the inconvenience of traveling to their designated center or enduring extended wait times if they visit a closer lab as a walk-in client. 

3. Limited genetic testing options 

Source: Quest Diagnostics

Quest Diagnostics offers various tests tailored to different medical needs. One recently launched service is Genetic Insights, which leverages Next-Generation Sequencing. While this technology is advanced, it has limitations, as it typically provides a limited view of genetic variants rather than a comprehensive analysis of the entire genome. 

Quest Diagnostics genetic tests cover:

• Hereditary cancer screening

• Cardiology-related genetic testing

• Pregnancy and fertility assessments

• Solid tumor profiling

• Inborn errors of metabolism testing

Quest Diagnostics's Genetics Insights utilizes more advanced technology than popular consumer genetic services like 23andMe and Ancestry, which analyze only about 700,000 DNA markers. In comparison, Quest’s NGS technology examines approximately three million DNA data points, offering a significantly deeper level of genetic analysis.

Tip 💡

If you want to analyze your entire genome (almost all six billion DNA bases), consider Nucleus, which uses whole-genome sequencing (WGS), which captures nearly all genetic variants, providing a complete view of your genetic makeup. 

Nucleus also goes beyond mere DNA testing by factoring in lifestyle and environmental factors to provide a well-rounded perspective on potential health risks. Order your kit today to learn about your potential risks.

4. Data privacy 

Quest Diagnostics claims to address concerns about data privacy by implementing robust cybersecurity systems to protect patient data. Its HIPAA Notice of Privacy Practices outlines when and how your protected health information (PHI) may be shared:

• Treatment: To assist healthcare providers in coordinating patient care

• Payment: To facilitate claims with insurance providers 

• Healthcare operations: To enhance lab operations and quality control 

In addition, Quest Diagnostics may disclose PHI in response to law enforcement requests or for approved medical research that seeks to advance healthcare innovation. 

Despite these safeguards, Quest Diagnostics has faced legal challenges regarding data privacy. For example, in California, it was sued and fined nearly $5 million for improper disposal of hazardous and medical waste, including unredacted PHI, which violated privacy laws. 

Bonus — Learn about the data privacy approaches other medical testing providers adopt by checking out our reviews:

• Genetic Genie review

• 3x4 Genetics review 

• Nanopore vs Illumina

• SelfDecode review 

5.  Customer service 

Quest Diagnostics provides customer support through phone and email, enabling users to resolve issues related to testing locations, appointments, or other concerns. 

Despite these options, some customers have reported challenges. Many users have had issues reaching out to its support team, which can be particularly frustrating when dealing with urgent matters. 

Additionally, several Quest Diagnostics customer service reviews mention frustrations with the company not honoring appointments, so it seems that there is considerable room for improvement in this area.

[CTA]({
  "title":"Get 10% off your whole-genome kit",
  "cta":{
    "label":"Order your kit",
    "href":"https://www.mynucleus.com/product?promocode=welcome10"
  }
})

6. Prices and billing 

The cost of Quest Diagnostics’ tests varies depending on the panel's comprehensiveness. The table below outlines typical prices for its services:

| Test                       | Price |
|----------------------------|-------|
| Complete blood count       | $29   |
| Thyroid TSH function       | $49   |
| Men’s comprehensive test   | $385  |
| Women’s comprehensive test | $385  |
| STD screening — Basic      | $149

Quest’s costs are generally in line with other test providers like Labcorp. However, some tests, such as the Comprehensive Men's and Women’s Health Panel, are priced higher due to the broader range of biomarkers analyzed.

While pricing is an important consideration, most reviews on Quest Diagnostics center around its billing system. Several customers have cited issues such as being overcharged for services, receiving bills for tests they had already paid for, or struggling to rectify billing errors. Some also reported their insurance claims being denied, which led to disputes over unexpected out-of-pocket expenses.

A recurring theme among many Quest Diagnostics Google reviews is long waiting times, even when you have an appointment.

Another common complaint is related to confusing and misleading billing practices. Here’s what one customer had to say on Reddit:

[Reddit](https://www.reddit.com/r/Charlotte/comments/1fdu67a/quest_diagnostics_fraudulent_billing_for_labs/)

Final thoughts based on Quest Diagnostics lab reviews

Based on our expert evaluation of Quest Diagnostics, it’s clear the company has many strong points and notable limitations. The most important pros and cons to keep in mind are outlined below:

| Pros                                                                                 | Cons                                                                                                |
|--------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------|
| Offers over 100 tests, including genetic and cancer testing                         | Inconsistent test quality reported across locations                                                |
| Multiple options for testing: in-person, in-home, and self-collection kits          | Issues with billing transparency and occasional overcharges                                        |
| Accredited labs with CAP and ISO certifications                                     | History of data privacy concerns, including legal penalties for improper disposal of unredacted PHI |
| Convenient online platform for scheduling and results                               | Long wait times for customer support responses                                                     |
| Widespread network of facilities across the U.S., making it accessible to most users | Limited availability of in-home sample collection in some areas

While Quest Diagnostics offers various testing services, some options, such as its Genetic Insights test, are not as comprehensive as WGS alternatives. Coupled with concerns about billing transparency and customer service responsiveness, it may be worthwhile considering other options.

For instance, Nucleus offers more comprehensive health insights through WGS and charges a flat fee of $399. This gives you a clearer, more holistic picture of your genetic health without concerns about hidden costs. 

Nucleus: Redefining DNA health testing with whole-genome sequencing

Nucleus offers an all-in-one, clinical-grade DNA health test designed to provide comprehensive insights into your health. Unlike most other genetic testing services, its technology utilizes WGS and is 99.9% accurate. It captures far more information about genetic variants that may influence your risk of developing certain illnesses. 

With a single test, Nucleus screens for over 900 conditions and illnesses related to:

| Condition     | Some tests included                                |
|--------------|--------------------------------------------------|
| Heart disease | Hypertension and coronary artery disease        |
| Mental health | OCD, depression, and schizophrenia              |
| Cancer        | Breast cancer, prostate cancer, and gastric cancer |
| Neurology     | Parkinson’s disease and Alzheimer's disease     |

Beyond identifying genetic risks, Nucleus’ fully regulated services include over nine trait reports and personalized recommendations tailored to your unique profile. What truly sets Nucleus apart is its holistic approach, which considers how your lifestyle choices influence your health risks. This approach offers more actionable insights than genetic data alone. 

Nucleus is a HIPAA-compliant company, and its specialized genomic laboratories are CAP-accredited and CLIA-certified. Additionally, it takes extra precautions to ensure your data is never stored or sent overseas and destroys all DNA samples 60 days after analysis. 

Getting started with Nucleus 

At just $399, Nucleus offers a Whole Genome Sequencing (WGS) test as part of the Nucleus Premium package, which includes detailed genetic reports and regular updates to keep users informed about new insights. The process of ordering and receiving your results is simple and designed for your convenience: 

1. Sign up for Nucleus Premium

2. Fill out your personal information

3. Order your kit 

Once your test kit arrives, use the provided cheek swab to collect your sample and ship it to Nucleus’ specialized lab using the prepaid USPS shipping package.

The results are typically ready in six to eight weeks, and you can view your personalized health insights in the Nucleus app. Take the first steps towards understanding your genetic blueprint today. 

You may also like…

Explore our reviews on other genetic testing services below:

|                                                                                                       |                                                                                      |
|-------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------|
| [Ancestry vs. 23andMe review](https://mynucleus.com/blog/ancestry-vs-23andme)                         | [MyHeritage vs. Ancestry review](https://mynucleus.com/blog/myheritage-vs-ancestry)  |
| [MyHeritage review](https://mynucleus.com/blog/myheritage-review)                                     | [InsideTracker alternative](https://mynucleus.com/blog/insidetracker-review)         |
| [Sequencing review](https://mynucleus.com/blog/sequencingcom-review)                                  | [InsideTracker review](https://mynucleus.com/blog/insidetracker-review)              |
| [tellmeGen reviews](https://mynucleus.com/blog/tellmegen-review)                                      | [23andMe alternatives](https://mynucleus.com/blog/23andme-alternatives)              |
| [MyHeritage vs. 23andMe](https://mynucleus.com/blog/myheritage-vs-23andme)                            | [Myriad Genetics review](https://mynucleus.com/blog/myriad-genetics-review)          |
| [Illumina sequencing vs. Sanger sequencing](https://mynucleus.com/blog/illumina-sequencing-vs-sanger) | [PacBio vs. Illumina](https://mynucleus.com/blog/pacbio-vs-illumina)                 |
| [Ancestry alternatives](https://mynucleus.com/blog/ancestrycom-alternatives)                          | [CRI genetics vs. 23andMe](https://mynucleus.com/blog/cri-genetics-vs-23andme)       |
| [Nebula Genomic reviews](https://mynucleus.com/blog/nebula-genomics-review)                           | [Sequencing vs. Nebula Genomics](https://mynucleus.com/blog/sequencingcom-vs-nebula) |
| [FamilyTreeDNA vs. 23andMe](https://mynucleus.com/blog/family-tree-dna-vs-23andme)                    | [FamilyTreeDNA review](https://mynucleus.com/blog/familytreedna-reviews)             |

Featured image source: Edward Jenner