Medicaid and the Children's Health Insurance Program (CHIP) provide health coverage for low-income children, families, seniors and people with disabilities. For assistance with completing these forms, call the TMHP Contact Center at 1-800-925-9126.ALL PROVIDERS – Forms and Attachments. You can apply for Medicaid in any one of the following ways: Write, phone, or go to your local department of social services. If you don't know what type of Medicaid you have, call toll-free 800-964-2777. Traditional Medicaid. Catholic Charities Dental Clinic. Aetna Better Health takes a total approach to your health and Medicaid. Learn more about how Aetna Better Health of Texas can help you.