Hematology
Mark Sienko, M.D.
Gig Harbor, WA
Since joining Cancer Care Northwest in 2006, Dr. Sienko has continued pursuing his special interest in treating colon and lung cancers.
35+
Years in Practice
Peer Recognition
- Castle Connolly — Top Doctor
2022-2026 (5 years)
- Healthgrades — Healthgrades Honor Roll
Clinical Focus
Subspecialties
Hematology & OncologyMedical Oncology
Conditions & Treatments
LeukemiaLymphomaMultiple MyelomaHematologic Malignancies
Practice Details
Hospital Affiliations
- Olympic Medical Center
- MultiCare Covington Medical Center
- Forks Community Hospital
- MultiCare Deaconess Hospital
Experience
35+ years in practice