Skip to main content

Outage notice:

Due to the global information outage that occurred Friday, Quest is taking swift action to respond, recover and restore our operations. Our Patient Services are operating with reduced capacity so you may experience longer wait and service times. Our Customer Contact teams are currently unavailable. We appreciate your patience as we work toward returning to normal operations. 


Quest Diagnostics® is committed to delivering insights into your patients’ health throughout every step of their cancer journey-screening, diagnosis, treatment, prognosis, and monitoring.

Quest is your single-source solution with a comprehensive test menu; over 600+ board-certified pathologists, dermatopathologists, and medical experts; leading technology; and committed customer service—delivering the experience of a boutique lab backed by the power of one of the largest labs in the world.

We are committed to providing the diagnostic insights and services you need to help your patients in fighting cancer.

Quest offers its clients a dedicated oncology customer support line to assist with any test-related questions: 1.833.773.1441

Quest Diagnostics offers a comprehensive menu of solid tumor solutions. Our decision-support tools help you find the best treatment plan, whether by aligning with standard of care and clinical trial options, or by helping you navigate new and emerging therapies beyond current standards of care.

Advanced Solutions

  • A broad oncology test menu available, including pan-cancer and cancer-specific panels
  • Comprehensive health plan coverage to help reduce patient financial responsibility
  • Easy access to Quest oncology experts for consultation and results interpretation

Enhanced Solutions

  • Block retrieval program for when the sample is not on hand
  • Prior authorization and patient financial assistance programs available
  • Dedicated oncology specialized customer service team available at 1.833.773.1441

Learn more about our solid tumor cancer solutions.

We offer hematology cancer testing services across the spectrum, from routine to specialized.

  • Comprehensive diagnostic services for blood and bone marrow biopsies with trending reports
  • Molecular assays, many of which were developed by our team at Quest Diagnostics® Nichols Institute
  • Cytogenetics including DNA microarrays
  • Flow cytometry, including specialty panels and PNH (paroxysmal nocturnal hemoglobinuria) testing
  • Reference menus for FISH (fluorescence in situ hybridization), IHC (immunohistochemistry) and special stains

About 1 in 3 people in the United States will develop cancer during their lifetime,1 so it’s not uncommon to have many cancers in the same family. Less often, cancers in a family are strongly linked to an inherited gene mutation that is part of a hereditary cancer syndrome.  

Our hereditary cancer solutions help close the gap between the unknown and the path forward. A complete portfolio of hereditary cancer tests, services, and expert analysis from our on-staff genetic counselors help you understand your patients’ risk and are the first step in our approach to supporting a patient’s cancer journey.

Tests include:

  • Comprehensive and guideline-based hereditary cancer panels
  • Cancer-specific panels
  • Hereditary cancer syndrome panels
  • Single-gene and single-site tests

Our genetic counselors are available to consult about test selection and results interpretation. To speak with a genetic counselor, call 1.866.GENE.INFO (1.866.436.3463).

Learn more about our hereditary cancer testing solutions.

The diagnosis and treatment of cancer is advancing rapidly. Yet for healthcare, cancer remains one of the costliest challenges. To help health systems, community cancer centers, oncologists, and other providers stay ahead, Quest offers a range of oncology solutions from hereditary cancer risk panels to extensive molecular testing.

With a growing list of nearly 50 companion diagnostic tests, Quest’s oncology testing, medical expertise, and technical solutions can help providers, oncologists, and health systems keep pace with the latest diagnostic tools and treatments.

Why choose Quest for your oncology testing needs?

This information is provided for informational purposes only and is not intended as medical advice. A physician’s test selection and interpretation, diagnosis, and patient management decisions should be based on his/her education, clinical expertise, and assessment of the patient.




  1. American Cancer Society. Family cancer syndromes. Updated August 5, 2020. Accessed August 10, 2020.