Texas Designated Doctor Certification Application is an application process for medical professionals to become certified as a Designated Doctor in the state of Texas. Through the application, medical professionals can become certified to provide medical services to individuals who have been injured or made ill due to work-related activities. The types of Texas Designated Doctor Certification Applications include: 1) Basic Certification Application, 2) Addendum Application, and 3) Renewal Application. The Basic Certification Application is for medical professionals who are new to the certification process and wish to become certified as a Designated Doctor. The Addendum Application is for medical professionals who have already been certified and wish to add additional specialties or services to their certification. The Renewal Application is for medical professionals who are renewing their certification. All applications require a physician's license number and other pertinent information, including proof of continuing medical education and experience.