The study looks at how doctors and advanced practice providers (APPs) prevent blood clots after surgery for certain cancers. **Venous thromboembolism (VTE)** means blood clots in veins, and **prophylaxis** is a way to prevent it. This study is part of the NCI Community Oncology Research Program (NCORP), which helps doctors follow guidelines to stop blood clots after surgery. The research involves surveys and interviews with surgeons and APPs, and checking electronic health records (EHR) to see if patients are getting the right care. **Key Points:** - The study is observational, meaning it watches what happens without changing anything. - Participants include surgeons and APPs from certain cancer surgery areas, like gastrointestinal and gynecologic. - The study includes surveys, interviews, and data analysis to improve practices. Surgeons and APPs who work with NCORP and perform cancer surgeries can take part. They don't need to be involved in research or have a special ID. Participants complete surveys and may take part in interviews. The study helps understand how to better prevent blood clots after cancer surgeries. Participating helps improve patient care!