Guardant Health, Inc.

505 Penobscot Dr.
Redwood City, CA 94063

Telephone: 855.698.8887
Fax: 888.974.4258

Contact us via email at:

Media inquiries:

Whistleblower Hotline


Email: (must include company name with report)

Direct Dial:
English-speaking USA and Canada: 833-290-0007
Spanish-speaking USA and Canada: 800-216-1288
French-speaking Canada: 855-725-0002
Spanish-speaking Mexico: 01-800-681-5340

AT&T USA Direct:
All other countries: 800-603-2869 (must dial country access code first click here for access codes and dialing instructions)
Fax: (215) 689-3885 (must include company name with report)