If your health insurance company sends a payment directly to you for our services, please endorse the check to Personalis (by writing “Payable to Personalis” on the back of the check). Then, mail it to: 1330 O’Brien Dr. Menlo Park, CA 94025, so that we can apply it to your account. If you have questions, please call Patient Billing Services at +1 (855) 373-7974