The first Boston medical marijuana dispensary, Patriot Care says they have already lined up more than 200 patients preregistered to shop. Pictured: The Herban Underground on Denver's "Green Mile" is a basement recreational and medical marijuana shop. (Vince Chandler, The Denver Post)

Milestone mania: First Boston medical marijuana dispensary set to open

Patriot Care says they've already lined up more than 200 patients preregistered to shop, prepared to serve at least 150 customers each day

BOSTON — The owners of the first-ever Boston medical marijuana dispensary are predicting a small turnout for the facility’s milestone opening.

Executives at Patriot Care were hard at work Tuesday night preparing for Wednesday’s grand opening, which is expected to draw just a few dozen customers with state-issued medical marijuana cards.

Even before the doors of the Milk Street store have opened, Patriot Care already has lined up more than 200 patients preregistered to shop in the dispensary. Company officials say they are prepared to handle at least 150 customers each day at the location.

Chief Executive Robert Mayerson says he’s proud that Patriot Care is taking a space that has been dormant for 10 years and bringing economic vitality back to it.

The dispensary is the seventh to open in Massachusetts.