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Contact Information & Locations

Northwest Clinical Laboratory takes pride in knowing we are large enough to meet the needs of our community while small enough to still maintain a personal touch in working with our customers and patients.

Our staff listens to the needs of our clients and customers and when feasible, adjusts our testing and/or procedures to better serve them. Our commitment is to provide quality, innovative laboratory services to our health care community.

Northwest Clinical Laboratory is located on the second floor of the main hospital building on the Northwest Hospital & Medical Center campus at 1550 N. 115th Street in North Seattle. Please stop at the patient registration desk to check in for your appointment.

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For more information on our services please contact:
Client Services 206-368-1776
Client Services Billing 206-368-1776
Clinical Laboratory 206-368-1776
Specimen Processing 206-368-1776


  • Medical Arts Building

  • Northwest Hospital
    1530 North 115th St., Suite 101
    Seattle, WA 98133
    Phone: 206-368-3005
    Fax: 206-368-3004
    Hours: Mon-Fri 6:30 a.m. - 5:00 p.m.

  • Northwest Hospital Tower - Specialty and After-Hours Testing*

  • 1550 North 115th St. (2nd floor)
    Seattle, WA 98133
    Phone: 206-368-1344
    Fax: 206-368-1345
    Hours: Mon-Fri 6:30 a.m. - 7:30 p.m., Sat/Sun/holiday 6:30 a.m. - 3:00 p.m.
    *Please call 206-368-1776 if require "after-hours" blood draw.

  • Northwest Outpatient Medical Center

  • 10330 Meridian Ave. N., Suite 130
    Seattle, WA 98133
    Phone: 206-368-6164
    Fax: 206-368-6165
    Hours: Mon-Fri 7:00 a.m. - 5:30 p.m.

  • Northcut Landing Building

  • 4915 25th Ave. NE, Suite 304
    Seattle, WA 98105
    Phone: 206-368-5892
    Fax: 206-522-5263
    Hours: Mon-Th 9:00 a.m. - 5:30 p.m. (closed 12:30 p.m. - 1:30 p.m.)

CAP Accreditation