Mark Edward Sienko, MD - Medicare Medical Oncology in Sequim, WA

Mark Edward Sienko, MD is a medicare enrolled "Internal Medicine - Medical Oncology" physician in Sequim, Washington. He graduated from medical school in 1989 and has 35 years of diverse experience with area of expertise as Medical Oncology. He is a member of the group practice Olympic Medical Physicians and his current practice location is 844 N 5th Ave, Sequim, Washington. You can reach out to his office (for appointments etc.) via phone at (360) 683-9895.

Mark Edward Sienko is licensed to practice in Washington (license number MD00046621) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1932146552.

Contact Information

Mark Edward Sienko, MD
844 N 5th Ave,
Sequim, WA 98382-3045
(360) 683-9895
(360) 582-5614

Map and Direction




Physician's Profile

Full NameMark Edward Sienko
GenderMale
SpecialityMedical Oncology
Experience35 Years
Location844 N 5th Ave, Sequim, Washington
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mark Edward Sienko graduated from medical school in 1989
  NPI Data:
  • NPI Number: 1932146552
  • Provider Enumeration Date: 06/01/2006
  • Last Update Date: 02/26/2020
  Medicare PECOS Information:
  • PECOS PAC ID: 7618910811
  • Enrollment ID: I20060628000327

Medical Identifiers

Medical identifiers for Mark Edward Sienko such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1932146552NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RX0202XInternal Medicine - Medical Oncology MD00046621 (Washington)Primary
207RH0003XInternal Medicine - Hematology & Oncology MD00046621 (Washington)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Olympic Medical Home HealthPort angeles, WAHome health agency
Assured Home Health, Hospice & Home CareCentralia, WAHospice
Olympic Medical CenterPort angeles, WAHospital
Forks Community HospitalForks, WAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Olympic Medical Physicians9537172358113

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Mark Edward Sienko allows following entities to bill medicare on his behalf.
Entity NameOlympic Medical Physicians
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1427081967
PECOS PAC ID: 9537172358
Enrollment ID: O20060721000246

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mark Edward Sienko is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mark Edward Sienko, MD
Po Box 850,
Port Angeles, WA 98362-0146

Ph: (360) 683-9895
Mark Edward Sienko, MD
844 N 5th Ave,
Sequim, WA 98382-3045

Ph: (360) 683-9895

Reviews and Comments


Internal Medicine Doctors in Sequim, WA

Dr. Carl G Weber, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 800 N 5th Ave, Ste 101, Sequim, WA 98382
Phone: 360-582-2690    Fax: 360-582-2691
Samantha F Reiter, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 840 N 5th Ave, Ste 100, Sequim, WA 98382
Phone: 360-582-2850    Fax: 360-582-2851
Dr. Eiko Klimant, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 844 N 5th Ave, Sequim, WA 98382
Phone: 360-683-9895    Fax: 360-582-5614
Carrie L Sun, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 800 N 5th Ave, Sequim, WA 98382
Phone: 360-565-0999    Fax: 360-582-4221
Dr. David Patrick Murphy, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 840 N 5th Ave Ste 1500, Sequim, WA 98382
Phone: 360-565-0999    Fax: 360-582-2841
Dr. Frank Henry Jahns, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 840 N 5th Ave Ste 1500, Sequim, WA 98382
Phone: 360-565-0999    Fax: 360-582-2841
Harry Everett Lyndes, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 777 N 5th Ave, Suite 105, Sequim, WA 98382
Phone: 360-582-2623    Fax: 360-582-9623

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.