Find contact information here to make an appointment.

About
Dr. Mark Sienko, MD is
Education
- 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
* Please verify this information when scheduling an appointment.
Patient Satisfaction
Leave a review
How likely are you to recommend Dr. Sienko?
Very Good Dr Sienko is very knowledgeable and explains things in terms you can understand. I feel he is very concerned about my health

Frequently Asked Questions
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 in specializes in Medical Oncology. See more on Sharecare.
Dr. Sienko frequently treats the following conditions: Non-Hodgkin's Lymphoma, Neutropenia and Lymphosarcoma. See more on Sharecare.
Dr. Sienko's office is located at 605 E Holland Ave Ste 100 Spokane, WA 99218. You can find other locations and directions on Sharecare.
Dr. Sienko provides telehealth services. Please contact the office to determine whether you are eligible.
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.
Dr. Mark Sienko, MD has a star rating of 2.6/5. See more patient feedback on Sharecare.
Hospital Affiliations
- Forks Community Hospital
- Olympic Medical Center
Locations
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Providence Gynecologic Oncology - Spokane
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1
Cancer Care Northwest
605 E Holland Ave Ste 100, Spokane, WA 99218 (509) 228-1000
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1
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Cancer Care Northwest
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2
Chewelah Associated Physicians
410 E King Ave, Chewelah, WA 99109 (509) 228-1000
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2
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Olympic Medical Cancer Center
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3
Olympic Medical Cancer Center
844 N 5th Ave, Sequim, WA 98382 (360) 683-9895
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3