Success! Thank you for your submission. One of our disability advocates will contact you or the person referred to discuss options. Back to Home Headquarters 25700 Interstate 45 North, Suite 300 Spring, Texas 77386 Phone Sales 800.835.7474 Patient Billing 866.770.2116 Eligibility Assistance 866.402.3630 Disability Advocates 866.534.6699 Third Party Liability 877.268.1705