Benjamin Siemanowski, MD - Medicare Gastroenterology in Bellingham, WA

Benjamin Siemanowski, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Bellingham, Washington. He went to Jefferson Medical College Of Thomas Jefferson University and graduated in 2000 and has 24 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Northwest Gastroenterology Professional Llc and his current practice location is 3111 Woburn St Ste 201, Bellingham, Washington. You can reach out to his office (for appointments etc.) via phone at (360) 734-1420.

Benjamin Siemanowski is licensed to practice in Washington (license number MD00047499) 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 1548301120.

Contact Information

Benjamin Siemanowski, MD
3111 Woburn St Ste 201,
Bellingham, WA 98226-6610
(360) 734-1420
(360) 733-1659

Map and Direction




Physician's Profile

Full NameBenjamin Siemanowski
GenderMale
SpecialityGastroenterology
Experience24 Years
Location3111 Woburn St Ste 201, Bellingham, 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:
  • Benjamin Siemanowski attended and graduated from Jefferson Medical College Of Thomas Jefferson University in 2000
  NPI Data:
  • NPI Number: 1548301120
  • Provider Enumeration Date: 02/08/2007
  • Last Update Date: 05/24/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0244337285
  • Enrollment ID: I20070525000302

Medical Identifiers

Medical identifiers for Benjamin Siemanowski such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1548301120NPI-NPPES
7201924OtherWAAETNA
1548301120MedicaidWA
2854SIOtherWAREGENCE
0229984OtherWAL&I AND CRIME VICTIMS

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology MD00047499 (Washington)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Joseph HospitalBellingham, WAHospital
Island HospitalAnacortes, WAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Northwest Gastroenterology Professional Llc933505226515

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. Benjamin Siemanowski allows following entities to bill medicare on his behalf.
Entity NameNorthwest Gastroenterology Professional Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033278411
PECOS PAC ID: 9335052265
Enrollment ID: O20031107000129

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. Benjamin Siemanowski 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
Benjamin Siemanowski, MD
3111 Woburn St Ste 201,
Bellingham, WA 98226-6610

Ph: (360) 734-1420
Benjamin Siemanowski, MD
3111 Woburn St Ste 201,
Bellingham, WA 98226-6610

Ph: (360) 734-1420

Reviews and Comments


Internal Medicine Doctors in Bellingham, WA

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Dr. Sukhjit Singh Shergill,
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Practice Location: 4545 Cordata Pkwy, Suite 2b, Bellingham, WA 98226
Phone: 360-738-2200    Fax: 360-752-5683

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.