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

Joseph Siemienczuk, MD

Individual provider Internal Medicine Physician · NPI 1619900230

Joseph Siemienczuk, MD is an Internal Medicine Physician in Portland, Oregon. Licensed in Oregon. Registered with an NPI since 2006.

Licensed in
OR
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

5050 NE Hoyt St Ste 454
Portland, OR 97213-2991
Phone: (503) 215-6405
Fax: (503) 215-6429
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD12852 (OR)

Record details

NPI number1619900230
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 8, 2006
Last updated in NPPESJune 13, 2008

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