This has now been added. It will download all immunizations from the Maryland ImmuNet web site.
It order to use you must have a Maryland ImmuNet user name and password. Click on import NYSIS and when prompted for state enter MD. It will look on Maryland ImmuNet instead of NYSIS.
To change the user name go to the administration screen and choose NYSIS User name from the admin drop down. Enter the correct settings in each column.