By Car:

From I-5 North Bound:
Take exit #173 (Northgate Way). Turn right onto 1st Ave. NE.
Proceed to the south end of the Northgate Shopping Mall and take a left at NE 103rd Street signal. (If you take I-5 Express lane, exit to NE 103rd St. and go straight.)
At the third signal (5th Ave. NE and NE 103rd St), you can see the Northgate Professional Center across the street to your right.
Parking is in the back of the building.

From I-5 South Bound:
Take exit #173 (Northgate Way). Follow the eastbound signs to 1st Ave NE.
Go around the ramp and turn right (east) onto Northgate Way.
Just after you pass under the freeway, turn right onto 1st Ave. NE.
Proceed south on 1st Ave. NE. to the end of the Northgate Shopping Mall.
Take a left at the NE 103rd street signal.
Continue to the third signal (5th Ave. NE and NE 103rd St). There you can see the Northgate Professional Center across the street to your right.
Parking is in the back of the building.

By Bus:

From Seattle Downtown:
From Seattle Downtown: Take Metro bus #41 (To Lake City via Northgate Transit Center) and get off the bus at the next bus stop after the Northgate Transit Center.
Northgate Professional Center is right there at the corner of 5th Ave. NE and NE 103rd Street intersection on the same side of the bus stop. (King County Metro Bus Trip Planner)

Map