On-site services are available at several locations, including: laboratory, radiology, mammography, ultrasound, echocardiography, MRI and CT scans.

When its doors opened at the American Bank Building, located on 2nd Avenue in downtown Seattle, The Polyclinic offered primary and specialty care, supported by its own lab, x-ray, and surgery space.

After some expanding and an increase in offered care, The Polyclinic and its 11 physicians moved in October 1965 to one of its current locations on First Hill, Seattle at Broadway.

In 1965 The Polyclinic opened the Downtown location, featuring Family Medicine, Dermatology, Allergy / Asthma / Clinical Immunology, and Rheumatology.

[6] This location became the main hub for primary and specialty care at The Polyclinic, visible from Interstate 5.