Several health conditions may affect whether you meet the medical requirements to receive or renew your DOT physical certification. Understanding these conditions ahead of your exam can help you prepare, address any concerns with your healthcare provider, and avoid unnecessary delays. At AFC Urgent Care Cambridge Porter Square, we offer walk-in DOT physicals to the residents of Cambridge and nearby communities. Our clinic is open 7 days a week from 8am to 8pm. Save Your Spot Can ...