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Dr. Mark Sienko, MD

Dr. Mark Sienko, MD

Age 63 Medical Oncology M
(14) 14 reviews
Accepting New Patients


Dr. Mark Sienko, MD is a Medical Oncology Specialist in Spokane, WA. Dr. Sienko studied at University Of Illinois College Of Medicine Chicago. They currently practice at Providence Gynecologic Oncology - Spokane and are affiliated with Forks Community Hospital and Olympic Medical Center. Dr. Sienko is board certified in Internal Medicine and accepts accepts multiple insurance plans.


  • University Of Texas Southwestern Medical Center, Fellowship Hospital — 2005
  • St. Paul University, Internship Hospital — 1990
  • University Of Illinois College Of Medicine Chicago, Medical School — 1989
  • Northwestern University, Undergraduate School — 1982

Insurance Accepted

  • Aetna
  • Anthem
  • Assurant Health
  • Blue Cross Blue Shield
  • Blue Cross of Idaho
  • CareFirst Blue Cross Blue Shield
  • Cigna
  • Commercial Insurance Company
  • First Choice Health
  • First Health
  • Government Employees Health Association (GEHA)
  • Group Health Cooperative (GHC)
  • HealthSmart
  • Humana
  • LifeWise
  • Medicaid
  • Molina Healthcare
  • Planned Administration Inc
  • Premera Blue Cross
  • Providence Health Plans
  • Regence Blue Cross Blue Shield
  • Regence Blue Shield of Washington
  • TriWest Champus
  • UnitedHealthCare

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Dec 18, 2019
Very Good Dr Sienko is very knowledgeable and explains things in terms you can understand. I feel he is very concerned about my health
Sam Nicholas in Ione, WA — Dec 18, 2019
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Mark Sienko, MD. To arrange an appointment, call the number on Dr. Sienko's profile.

Dr. Sienko frequently treats the following conditions: Non-Hodgkin's Lymphoma, Neutropenia and Lymphosarcoma. See more on Sharecare.

Dr. Mark Sienko, MD is affiliated with Forks Community Hospital and Olympic Medical Center.

Yes, Dr. Mark Sienko, MD holds board certification in Internal Medicine and Medical Oncology.

Hospital Affiliations

  • Forks Community Hospital
  • Olympic Medical Center


  1. Providence Gynecologic Oncology - Spokane

    1. 1
      Cancer Care Northwest
      605 E Holland Ave Ste 100, Spokane, WA 99218 (509) 228-1000
  1. Cancer Care Northwest

    1. 2
      Chewelah Associated Physicians
      410 E King Ave, Chewelah, WA 99109 (509) 228-1000
  1. Olympic Medical Cancer Center

    1. 3
      Olympic Medical Cancer Center
      844 N 5th Ave, Sequim, WA 98382 (360) 683-9895