Skip to content
Know Cancer

Walter Holder, The Polyclinic

Surgical Oncology Physician · MD · Oncologist in Seattle, WA

1145 Broadway

Seattle, WA 98122

(206) 860-5414

Provider details

Specialty
Surgical Oncology Physician
Credentials
MD
NPI number
1073580536

Checked against the CMS National Provider Identifier registry on October 2, 2026.

About

Walter Holder, The Polyclinic, MD, is a surgical oncology physician in Seattle, Washington, registered with the federal National Provider Identifier (NPI) registry. Contact the provider directly to confirm services, hours and accepted insurance.

Other care in Seattle

Listings are provided for information only and may be out of date. Know Cancer does not endorse any provider. Please confirm details directly with the provider.