Yes, you should call the police after an accident and call 911 to report any injuries. This is the best way to get medical help right away and start a paper trail of evidence regarding the basic facts of your accident.
A police report reinforces your version of the accident and helps prevent the other person from placing blame where it doesn’t belong. The police will also gather important information you can use, like the other driver’s insurance information and the names and contact information of witnesses.
Remember, you are required by Maryland state law to exchange basic contact and insurance information with another driver in an accident. Don’t leave the scene until you do this and alert the police about the accident.