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Contact Quest Diagnostics Customer Service

How to Reach a Person at Quest Diagnostics

Verified Contact Information

Toll-Free Number:

  • 1-800-877-7484
    Employer Solutions
Call customer service
Send Message

Customer Service:

  • 1-800-890-6220
    AmeriPath and Dermpath Diagnostics
  • 1-866-358-9828
    Cleveland HeartLab
  • 1-800-891-2917
    Diagnostic Laboratory of Oklahoma (DLO)
  • 1-800-677-6726
    ExamOne
  • 1-800-553-5445
    Nichols Institute
  • 1-800-336-3718
    Nichols Institute, Chantilly
  • 1-800-421-4449
    Nichols Institute, Valencia
  • 1-800-631-1390
  • +55 112 985 3341
    Diagnostic Testing and Services Brazil
  • +52 800 527 7534
    Diagnostic Testing and Services Mexico
  • +52 554 160 7777
    Diagnostic Testing and Services Mexico City
  • +52 555 089 1221
    Direct Consumers, Patients, and Physicians Mexico
  • +52 555 089 1203
    Regional Director, Mexico
  • +44 208 377 3400
    United Kingdom
  • +1 787 725 8243
    Worldwide Representative

Headquarters:

  • 1-800-222-0446

Investors/ Franchising:

  • 1-973-520-2900
    Investor Relations

Sales/ Reservations:

  • 1-866-697-8378
    Questions About My Order or Make an Order

Quest Diagnostics Emails:

Headquarters
Investors/ Franchising
Legal
Patient Advocacy, Privacy Inquiries
Media

Quest Diagnostics Customer Service Overview

The aggregated data is based on calls made from PissedConsumer.com website and questionnaires provided by PissedConsumer.com users.
Most Popular Quest Diagnostics Phone Number
1 (800) 877-7484
Average Hold Time
00:01:56
Average Calls duration
3 minutes
Most Popular Quest Diagnostics Email Address
LeadIndependentDirector@questdiagnostics.com
Quest Diagnostics Live Agent Availability
17% of callers successfully reach a real person
Issue Resolution Rate
Low (10% reported full resolution)
Call Volume by Day
sun
mon
tue
wed
thu
fri
sat
View full overview ›

How to Contact Quest Diagnostics?

Most Popular Number:

(800) 877-7484
Employer Solutions
Total calls: 3 387 Issues resolved: 112 Last call: Apr 13, 2026

If you have undergone testing with Quest Diagnostics and would like to inquire about your results, there is a dedicated phone number you can reach out to. By contacting Quest Diagnostics' Customer Service department at 1-866-697-8378, you can seek information about your test results or address any inquiries you may have regarding their services.

The knowledgeable Customer Service representatives of Quest Diagnostics are also equipped to assist you promptly and provide the necessary guidance or explanations related to your test results.

To reach a live person at Quest Diagnostics, simply call their Customer Service department at 1-866-697-8378. Following the provided phone menu options will connect you with a knowledgeable representative who can address your specific concerns or inquiries.

Whether you have questions about test results, appointment scheduling, or other related matters, the live person at Quest Diagnostics will be ready to provide personalized assistance and guide you through the necessary steps or processes.

You have the option to contact Quest Diagnostics through email as well. Quest Diagnostics offers an online inquiry/contact form on their official website, allowing you to submit an inquiry or message. The dedicated customer support team at Quest Diagnostics will carefully review your email and provide a response accordingly. To ensure a prompt and accurate reply, provide precise and detailed information in your email.

PissedConsumer Club

Contact Information

Quest Diagnostics Website:

Quest Diagnostics Help Center:

Corporate Office Address:

Quest Diagnostics Incorporated
500 Plaza Drive
Secaucus, New Jersey 07094
United States

Other Info (opening hours):

Hours:

Monday - Friday: 8:00am - 5:00pm

More contact details

Summary of Quest Diagnostics Customer Service Calls

4.9K TOTAL
CALLS
03:12 AVG CALL
DURATION
10% ISSUES
RESOLVED

Top Reasons of Customers Calls

Consumers Call the Most From

Why Do People Call Quest Diagnostics?

Request for Information Question:

  • “Confirming 4/15/26. 1:20 pm appt at 3800 Mt Diablo Blvd Lafayette,Ca facility”
  • “Appointment”
  • “I want to speak to live person”

Payments and Charges Question:

  • “Why am I being BILLED”
  • “Payment”
  • “Billing question”

Product/ Service Question:

  • “Lab work sent to my primary”
  • “Schedule blood draw”
  • “Check if they got my paperwork”

Account Question:

  • “I wanted to verify my appointment”
  • “Forgot appointment information”
  • “Can’t get into account to review bloodwork”

Shipping and Delivery Question:

  • “Why are my test results delayed? It has taken too long.”
  • “I have applied for medical courier position and I am still getting job offers for the positions”
  • “My husbands name is spelled wrong so his lab results didnt get sent to doctor in a timely fashion”

Staff Question:

  • “Internect service”
  • “Customer service”
  • “Home service blood test”

Activation/ Cancellation Question:

  • “Cancel appointment”
  • “Want to cancel free style libre and monitor”
  • “I need to cancel my appointment”

Employment Question:

  • “W2 form”
  • “Payroll”
  • “Verify dates of employment”

Return/ Replace Question:

  • “Change insurance information”
  • “Correct insurance”
  • “Email change”

Website/ Application Question:

  • “Your website says you do not take insurance at this time, my Aetna provider says you’re my network provider so what is the current status of that?”
  • “Because your website is awful & so is the automated appointment”
  • “App”

Refund Question:

  • “I am do a refund and am getting a runaround”
  • “To get a refund from paying for own bloodwirk”

Cards Question:

  • “Wrong card on file”
  • “Did not give back inside. Card”

Other Question:

  • “Lab sppt”
  • “Test results”
  • “Had appt not taken”

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