Guardant Health, Inc. (“Guardant”) are writing to notify you of an incident that involved some of your information.
Secure Processing Center
P.O. Box 3826
Suwanee, GA 30024
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Dear <>:
is committed to protecting the privacy and security of the information in our care. We
Guardant is a laboratory that performs
cancer screening tests on samples received from our partners, which includes physicians and hospitals. Your information
may have been shared with Guardant from one of our partners.
Guardant recently determined that a file containing certain personal information related to samples collected in late 2019
and 2020 was inadvertently made available in a publicly accessible online platform. Guardant promptly removed the file
from the online platform and initiated an investigation. The investigation revealed that a Guardant employee inadvertently
transferred the file to the platform. The file was believed to have been transferred in October 2020, and on March 4, 2024,
we were able to determine, based on a review of available records of activity, that the file was copied by unidentified third
parties between September 8, 2023 and February 28, 2024. The information contained in the file varied per individual but
may have included some or all of the following: names, ages, medical record and identification numbers, and medical
information such as treatment information and dates, and test results. Significantly, no financial information or Social
Security numbers were contained in the file.
As general good practice, it is recommended that you regularly monitor statements from your medical providers for any
irregularities.
We regret this incident and have enhanced technical controls in systems that contain patient information and continue to
educate our workforce regarding the handling of sensitive information. If you have questions, please call us at 888-326-
0350, available Monday through Friday from 6:00AM to 6:00PM, Pacific.
Sincerely,
Guardant Health
P.O. Box 3826
Suwanee, GA 30024
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<>, <><>
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Dear <>:
is committed to protecting the privacy and security of the information in our care. We
Guardant is a laboratory that performs
cancer screening tests on samples received from our partners, which includes physicians and hospitals. Your information
may have been shared with Guardant from one of our partners.
Guardant recently determined that a file containing certain personal information related to samples collected in late 2019
and 2020 was inadvertently made available in a publicly accessible online platform. Guardant promptly removed the file
from the online platform and initiated an investigation. The investigation revealed that a Guardant employee inadvertently
transferred the file to the platform. The file was believed to have been transferred in October 2020, and on March 4, 2024,
we were able to determine, based on a review of available records of activity, that the file was copied by unidentified third
parties between September 8, 2023 and February 28, 2024. The information contained in the file varied per individual but
may have included some or all of the following: names, ages, medical record and identification numbers, and medical
information such as treatment information and dates, and test results. Significantly, no financial information or Social
Security numbers were contained in the file.
As general good practice, it is recommended that you regularly monitor statements from your medical providers for any
irregularities.
We regret this incident and have enhanced technical controls in systems that contain patient information and continue to
educate our workforce regarding the handling of sensitive information. If you have questions, please call us at 888-326-
0350, available Monday through Friday from 6:00AM to 6:00PM, Pacific.
Sincerely,
Guardant Health
