What is FoundationOne®CDx


FoundationOne®CDx is the first FDA-approved tissue-based broad companion diagnostic (CDx) that is clinically and analytically validated for all solid tumors. The test is designed to provide physicians with clinically actionable information - both to consider appropriate therapies for patients and understand results with evidence of resistance – based on the individual genomic profile of each patient’s cancer.

Test results include microsatellite instability (MSI) and tumor mutational burden (TMB) to help inform immunotherapy decisions, and loss of heterozygosity (LOH) for ovarian cancer patients. You can also order PD-L1 immunohistochemistry (IHC) testing# as an optional add-on test. Foundation Medicine’s test portfolio enables you to easily reflex FoundationOne CDx, a tissue-based test, to FoundationOne®Liquid CDx, a blood-based test, or vice versa.

Coverage includes:

  • National coverage for qualifying Medicare1 and Medicare Advantage2 patients across all solid tumors.3
  • 80 commercial health plans cover one or more Foundation Medicine tests.

87% -- or nearly 9 out of 10 patients -- pay $0 for testing.4

Cancer Type

  • Solid Tumors

Turnaround Time

Median turnaround time for FoundationOne CDx is 8.8 days5

Sample Type

  • FFPE Tissue

All Solid Tumors

A single test analyzes guideline-recommended genes in solid tumors, including companion diagnostic indications with a direct path to therapy. FoundationOne CDx also has national coverage for qualifying Medicare and Medicare Advantage patients across all solid tumors.


20+ FDA-approved targeted therapies and 3 group claims§

Proven to help predict patient benefit across multiple targeted therapies in multiple cancer indications with over 20 FDA-approved CDx indications and 3 group claims§:

  • Non-Small Cell Lung Cancer (NSCLC): EGFR Tyrosine Kinase Inhibitors (TKI) approved by FDA§ for EGFR exon 19 deletions and EGFR exon 21 L858R alterations
  • Melanoma: BRAF Inhibitors approved by FDA§ for BRAF V600E
  • Melanoma: BRAF/MEK Inhibitor Combinations approved by FDA§ for BRAF V600E and V600K

Genomic Signatures

Results include MSI and TMB with the option to add PD-L1# testing to help inform immunotherapy decisions. Loss of Heterozygosity (LOH) is included in results for ovarian cancer patients.



Biomarkers FDA-Approved Therapy§
EGFR exon 19 deletions & EGFR exon 21 L858R alterations EGFR Tyrosine Kinase Inhibitors (TKI) approved by FDA§
EGFR exon 20 T790M alterations Tagrisso® (osimertinib)
ALK rearrangements Alecensa® (alectinib), Alunbrig® (brigatinib) Xalkori® (crizotinib), or Zykadia® (ceritinib)
BRAF V600E Braftovi® (encorafenib) in combination with Mektovi® (binimetinib). Tafinlar® (dabrafenib) in combination with Mekinist® (trametinib)
MET single nucleotide variants (SNVs) and indels that lead to MET exon 14 skipping Tabrecta® (capmatinib)
ROS1 fusions Rozlytrek® (entrectinib)
Press Release

Foundation Medicine and Natera Announce the Launch of FoundationOne®Tracker Personalized Circulating Tumor DNA Monitoring Assay for Investigational Use and Early Access Clinical Use

Foundation Medicine, Inc., a pioneer in molecular profiling for cancer, and Natera, Inc., a global leader in cell-free DNA testing, today launched an early access program for clinical use of FoundationOne®Tracker, a personalized circulating tumor DNA (ctDNA) monitoring assay. In addition, the investigational use only version of the test is now available for use in clinical trials.


Press release

We Have Even More to Offer

Questions? We’re Here to Help

Please contact our client services team by phone at 
+1(888) 988-3639 or by email at the link below.

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Additional Notes

# PD-L1 by Immunohistochemistry (IHC) can be ordered as a supplemental test and may inform eligibility for several immunotherapies across different cancer types

‡ When “Portfolio Reflex” is selected on the test requisition form (TRF), Foundation Medicine will proceed with the initial test and if the specimen does not meet the criteria for successful testing, we will automatically reflex to the other test and procure a new specimen.

¶ Loss of Heterozygosity (LOH) status reported for ovarian cancer only § For the most current information about the therapeutic products in this group, go to:

1. Medicare administered by federal government.

2. Medicare administered by private insurers.

3. For FoundationOne®CDx and FoundationOne®Liquid CDx, see “Decision for Next Generation Sequencing (NGS) for Medicare Beneficiaries with Advanced cancer –CAG-00450R.” (See Appendix B) available in the Medicare Coverage Database,

4. Data on File, Foundation Medicine, Inc., 2022. Based on US settled claims from 1/1/21 to 3/31/22 for all CGP and IHC tests offered by Foundation Medicine and reported during that time before considering any financial assistance. 64% of commercially insured and 97% of Medicare and Medicare Advantage patients had a $0 financial responsibility for Foundation Medicine testing. Some patients may have higher financial responsibility.

5. From specimen receipt to report

*Cotellic®, Herceptin®, Kadcyla®, Perjeta®, Rozyltrek® , Tecentriq® and Zelboraf® are registered trademarks of Genentech, Inc. Faslodex®, Lynparza®, Tagrisso®, and Truqap™ are registered trademarks of the AstraZeneca group of companies. Xalkori® is a registered trademark of Pfizer Inc. Zykadia®, Tafinlar®, and Mekinist® are registered trademarks of Novartis AG Corporation Switzerland. Retevmo® is a registered trademark owned or licensed by Eli Lilly and Company. Erbitux® is a registered trademark of ImClone LLC, a wholly owned subsidiary of Eli Lilly and Company. Alecensa® is a registered trademark of Chugai Seiyaku Kabushiki Kaisha. Vectibix® is a registered trademark of Immunex Corporation. Piqray® is a registered trademark of Novartis AG. Pemazyre™ is a trademark of Incyte. Tabrecta™ is a trademark of Novartis. Keytruda® is a registered trademark of Merck. Exkivity® and Alunbrig® are a registered trademark of Takeda Pharmaceuticals International AG. Vitrakvi® is a registered trademark of Bayer Healthcare Pharmaceuticals Inc. Braftovi® is a registered trademark of Pfizer Inc. Mektovi® is a registered trademark of Array BioPharma Inc. Akeega® is a trademark of Janssen Biotech, Inc. 

Important Safety Information


FoundationOne CDx

FoundationOne®CDx is a qualitative next-generation sequencing based in vitro diagnostic test for cancer patients with solid tumors and is for prescription use only. The test analyzes 324 genes as well as genomic signatures including microsatellite instability (MSI) and tumor mutational burden (TMB) and is a companion diagnostic to identify patients who may benefit from treatment with specific therapies in accordance with the approved therapeutic product labeling. Additional genomic findings may be reported and are not prescriptive or conclusive for labeled use of any specific therapeutic product. Use of the test does not guarantee a patient will be matched to a treatment. A negative result does not rule out the presence of an alteration. Some patients may require a biopsy. For the complete label, including companion diagnostic indications and important risk information, please visit