Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Benjamin Siemanowski, MD

Individual provider Gastroenterology Physician · NPI 1548301120

Benjamin Siemanowski, MD is a Gastroenterology in Bellingham, Washington. Graduated from Jefferson Medical College of Thomas Jefferson University in 2000, 26 years ago. Practices with Northwest Gastroenterology Professional LLC, a 13-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
26
Trained at
Jefferson Medical College of Thomas Jefferson University
Licensed in
WA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3111 Woburn St Ste 201
Bellingham, WA 98226-6610
Phone: (360) 734-1420
Fax: (360) 733-1659
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD00047499 (WA)

Record details

NPI number1548301120
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 8, 2007
Last updated in NPPESMay 24, 2023
Certification dateMay 24, 2023
Mailing address3111 Woburn St Ste 201, Bellingham, WA 98226-6610

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolJEFFERSON MEDICAL COLLEGE OF THOMAS JEFFERSON UNIVERSITY
Graduated 2000 (26 years in practice)
Group practice Northwest Gastroenterology Professional Llc — 13 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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