Hello and welcome to PBreezey's guide for The Division achievement "The Doctor"
To unlock this achievement you will need to complete the mission "Madison Field Hospital," which is located right outside your Base of Operations in the Pennsylvania Plaza area and has a minimum recommended level of 4. Other than being really cool to run around Madison Square Garden killing bad guys, there is nothing too special about this mission. Enter the area, complete your objective, and complete the boss fight.
You will want to complete this mission ASAP as it gives you access to the Medical Wing of your Base of Operations, providing you with new skills, skill mods, talents, perks, etc. to help you progress throughout the game.
As with all main story missions I do recommend doing this with friends (or strangers) because: 1. It is always more fun with friends and 2. It will help you work on:
If you have any questions or comments please let me know. If you're going to downvote, please comment first and give me a chance to improve whatever issue you may have.
Good luck and happy hunting!