Gaithersburg
35 West Watkins Mill Road
Gaithersburg, MD 20878
(301) 398-0000

From I-270 North:

• Interstate 270 North to Clopper Road (Route 117 West) - Exit 10.
• Merge onto Clopper Road.
• At the fifth light, turn right on West Watkins Mill Road.
• MedImmune's main entrance (Building 35) is on the left.

From I-270 South:

• Take I-270 South to Quince Orchard Road (Route 124) - Exit 11B.
• Exit ramp will bring you out on Quince Orchard Road.
• At the second light, turn right on Clopper Road (Route 117).
• At the third light, turn right on West Watkins Mill Road.
• MedImmune's main entrance (Building 35) is on the left.

From National Airport:

• From National Airport drive north 12 miles along the river on the George Washington Parkway toward Maryland Route 495 (Capital Beltway). Exit onto the beltway will be on the right.
• Follow I-495 North to Maryland (5 miles) to Exit 38 (I-270 North).
• The road will divide; I-495 continues to the right and I-270 is to the left.
• Follow I-270 North toward Frederick, MD.
• Continue on I-270 to Clopper Road (Route 117 West) - Exit 10. Take the first exit on the right (Clopper Road).
• Merge onto Clopper Road.
• At the fifth light, turn right on West Watkins Mill Road.
• MedImmune's main entrance (Building 35) is on the left.

From Baltimore/BWI or Route 95:

• Follow Route 95 South to Maryland Route 495 (Capital Beltway) toward Silver Spring.
• Follow I-495 West for 9 miles to Exit 35 (I-270 North). This exit will be on the right after the Connecticut Avenue exit.
• Continue on I-270 to Clopper Road (Route 117) - Exit 10. Take the first exit on the right (Clopper Road).
• At the fifth light, turn right on West Watkins Mill Road.
• MedImmune's main entrance (Building 35) is on the left.

From Dulles Airport:

• Take the Dulles Access Road toward Washington for 13 miles to I-495 North.
• Take Exit 3B toward I-270 North. Once on I-495 stay in the left two lanes.
• After several miles the road will divide; I-495 continues to the right and I-270 is to the left.
• Follow I-270 North toward Frederick, MD.
• Continue on I-270 to Clopper Road (Route 117) - Exit 10. Take the first exit on the right (Clopper Road).
• Merge onto Clopper Road.
• At the fifth light, turn right on West Watkins Mill Road.
• MedImmune's main entrance (Building 35) is on the left.