News Center Myriad Genetics Receives First Reimbursement Decision for myChoice® Diagnostic System in Japan, Enabling Women with Ovarian Cancer to Benefit from Treatment with Zejula® Myriad Genetics Receives First Reimbursement Decision for myChoice® Diagnostic System in Japan, Enabling Women with Ovarian Cancer to Benefit from Treatment with Zejula® January 8, 2021 Products Myriad Genetics Receives First Reimbursement Decision for myChoice® Diagnostic System in Japan, Enabling Women with Ovarian Cancer to Benefit from Treatment with Zejula® SALT LAKE CITY, Jan. 08, 2021 (GLOBE NEWSWIRE) — Myriad Genetics, Inc. (NASDAQ: MYGN), a leader in genetic testing and precision medicine, announced today that it received its first reimbursement decision for the Myriad myChoice® Diagnostic System, which helps determine if women with ovarian cancer will benefit from the PARP inhibitor, Zejula® (niraparib). myChoice was approved by Japan’s Ministry of Health, Labour and Welfare in September 2020 as a companion diagnostic for this indication and the reimbursement decision is now in effect. “Myriad’s myChoice test is the only one of its kind to be approved for reimbursement in Japan,” said Nicole Lambert, president of Myriad Genetic Laboratories. “This decision further advances precision medicine and helps ensure that more Japanese women have access to the most advanced therapies in their fight against ovarian cancer.” Myriad has been collaborating with Takeda Pharmaceutical Company in Japan since 2017 on the development of companion diagnostics to extend the benefit of the newest and most innovative treatments to more patients. Takeda is the largest pharmaceutical company in Asia and one of the top 10 largest pharmaceutical companies in the world by revenue. “This most recent approval enables physicians to have the best options available to effectively treat women with ovarian cancer,” said Professor Daisuke Aoki, M.D., Ph.D., Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan. “Physicians can immediately use Myriad myChoice to identify patients that could potentially benefit from treatment with Zejula.” In August 2020, myChoice was exclusively cited and the only named commercial companion diagnostic by the American Society of Clinical Oncology in new recommendations on the use of PARP inhibitors for the treatment and management of certain patients with advanced ovarian cancer. The new recommendations, based on clinical trial results, were published in the Journal of Clinical Oncology. Myriad has partnered with SRL Inc., a subsidiary of the H.U. Group Holdings, Inc., to commercialize the myChoice Diagnostic System in Japan. About SRL Since the establishment in 1970, SRL, Inc., a member of the H.U. Group Holdings, Inc., Japan-based leading healthcare group, has been providing comprehensive testing services as the largest commercial clinical laboratory in Japan. SRL carries out nearly 400,000,000 tests per year, covering a wide range of testing services including general/emergency testing, esoteric/research testing, companion diagnostics tests, genomic analysis, and etc. For more information, please visit https://www.srl-group.co.jp/english/. About the myChoice Diagnostic System Myriad myChoice is the most comprehensive homologous recombination deficiency (HRD) test, enabling physicians to identify patients with tumors that have lost the ability to repair double-stranded DNA breaks, resulting in increased susceptibility to DNA-damaging drugs such as platinum drugs or PARP inhibitors. The myChoice test comprises tumor sequencing of the BRCA1 and BRCA2 genes and a composite of three proprietary technologies (loss of heterozygosity, telomeric allelic imbalance and large-scale state transitions). For more information, visit: https://myriad-oncology.com/mychoice-cdx/ Zejula (niraparib) is a licensed product from GSK (formerly TESARO. Inc). About Myriad Genetics Myriad Genetics Inc., is a leading precision medicine company dedicated to transforming patient lives worldwide with pioneering molecular diagnostics. Myriad discovers and commercializes molecular diagnostic tests that: determine the risk of developing disease, accurately diagnose disease, assess the risk of disease progression, and guide treatment decisions across medical specialties where molecular diagnostics can significantly improve patient care and lower healthcare costs. For more information on how Myriad is making a difference, please visit the Company’s website: www.myriad.com. Myriad, the Myriad logo, BART, BRACAnalysis, Colaris, Colaris AP, myPath, myRisk, Myriad myRisk, myRisk Hereditary Cancer, myChoice, myPlan, BRACAnalysis CDx, Tumor BRACAnalysis CDx, myChoice CDx, Vectra, Prequel, Foresight, GeneSight, riskScore and Prolaris are trademarks or registered trademarks of Myriad Genetics, Inc. or its wholly owned subsidiaries in the United States and foreign countries. MYGN-F, MYGN-G. Safe Harbor Statement This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including statements related to the first reimbursement decision for the Myriad myChoice® Diagnostic System in Japan; and the Company’s strategic directives under the caption “About Myriad Genetics.” These “forward-looking statements” are based on management’s current expectations of future events and are subject to a number of risks and uncertainties that could cause actual results to differ materially and adversely from those set forth in or implied by forward-looking statements. These risks and uncertainties include, but are not limited to: uncertainties associated with COVID-19, including its possible effects on our operations and the demand for our products and services; our ability to efficiently and flexibly manage our business amid uncertainties related to COVID-19; the risk that sales and profit margins of our molecular diagnostic tests and pharmaceutical and clinical services may decline; risks related to our ability to transition from our existing product portfolio to our new tests, including unexpected costs and delays; risks related to decisions or changes in governmental or private insurers’ reimbursement levels for our tests or our ability to obtain reimbursement for our new tests at comparable levels to our existing tests; risks related to increased competition and the development of new competing tests and services; the risk that we may be unable to develop or achieve commercial success for additional molecular diagnostic tests and pharmaceutical and clinical services in a timely manner, or at all; the risk that we may not successfully develop new markets for our molecular diagnostic tests and pharmaceutical and clinical services, including our ability to successfully generate revenue outside the United States; the risk that licenses to the technology underlying our molecular diagnostic tests and pharmaceutical and clinical services and any future tests and services are terminated or cannot be maintained on satisfactory terms; risks related to delays or other problems with operating our laboratory testing facilities and our healthcare clinic; risks related to public concern over genetic testing in general or our tests in particular; risks related to regulatory requirements or enforcement in the United States and foreign countries and changes in the structure of the healthcare system or healthcare payment systems; risks related to our ability to obtain new corporate collaborations or licenses and acquire new technologies or businesses on satisfactory terms, if at all; risks related to our ability to successfully integrate and derive benefits from any technologies or businesses that we license or acquire; risks related to our projections about our business, results of operations and financial condition; risks related to the potential market opportunity for our products and services; the risk that we or our licensors may be unable to protect or that third parties will infringe the proprietary technologies underlying our tests; the risk of patent-infringement claims or challenges to the validity of our patents or other intellectual property; risks related to changes in intellectual property laws covering our molecular diagnostic tests and pharmaceutical and clinical services and patents or enforcement in the United States and foreign countries, such as the Supreme Court decisions in Mayo Collab. Servs. v. Prometheus Labs., Inc., 566 U.S. 66 (2012), Ass’n for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 576 (2013), and Alice Corp. v. CLS Bank Int’l, 573 U.S. 208 (2014); risks of new, changing and competitive technologies and regulations in the United States and internationally; the risk that we may be unable to comply with financial operating covenants under our credit or lending agreements; the risk that we will be unable to pay, when due, amounts due under our credit or lending agreements; and other factors discussed under the heading “Risk Factors” contained in Item 1A of our most recent Annual Report on Form 10-K for the fiscal year ended June 30, 2020, which has been filed with the Securities and Exchange Commission, as well as any updates to those risk factors filed from time to time in our Quarterly Reports on Form 10-Q or Current Reports on Form 8-K. All information in this press release is as of the date of the release, and Myriad undertakes no duty to update this information unless required by law. Media Contact: Jared Maxwell (801) 505-5027 jmaxwell@myriad.com Investor Contact: Scott Gleason (801) 584-1143 sgleason@myriad.com