Northern California Drug Testing Clinic is located at 3475 Investment Blvd Suite 202, Hayward, CA 94545. We offer a range of services, including drug testing, addiction treatment, chiropractic care, medical examinations, and paternity testing. Our clinic operates from Tuesday to Friday, 10 AM to 4 PM, providing a professional and confidential environment for all your testing needs. For more information, visit our website at drugtestca.com or call us at +15104915782.