OK, here's the deal. In order to be a card-carrying EMT in the state of Maryland, you need to be affiliated with a fire station in the state of Maryland. You can take the test, but they won't give you a card until you affiliate. And you pay for your test if you're not affiliated.
Your training includes this:
Field Internship
You will need to get a MINIMUM of 5 patient assessments (as in you check patient, ask questions, ASSESS (not take) vitals) and 5 transports. The only way to do this is through actual fire stations.
You will get a 2 hour hospital orientation where you watch transfer of patient care from EMS to definitive hospital care.
As much as I know you probably want to be an ER doc, YOU would do best in the field. Why? You will get so much more out of being in the field than cooped up in a hospital at this point. Think about how many pre-meds out there have actually gone on ambulances. If I am up to speed on my averages, possibly only 1 in 10. Most people in the ER are doctors, PAs, RNs, techs. I have yet to find a hospital that will take me.
However, being an EMT is VERY beneficial to you being a doctor, especially an ER one.
You get both clinical experience and volunteer service, and you get stories. My thread's a few below yours about trying my hardest to save a person and not succeeding. You get a lot of firsts in EMS. Before you dive into medicine, see how you like EMS. Because I guarantee you, if you do not enjoy EMS, you may have a difficult time working hours in the ER. Unlike most of your peers, you will have been out there, doing REAL care, and you're not getting a dime.
If you have any questions about EMS affiliation in Maryland, just ask. I can recommend a few stations for your ride-ons. I suggest you buddy up with stations ASAP. I'm familiar with a bunch of local ones in Rockville.
Ah, yes, if you are taking classes, you might want to set aside a lot of long weekends or nights doing calls. Murphy's Law guarantees that the county becomes safer when EMT-B students are riding. I got 3 calls in the morning of one day, when our unit's AC was broken, and when we fixed it, no more transports...
You might be able to get away with affiliating in DC.