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

Chelsea R Tieszen, MD, MS

Individual provider Internal Medicine Physician · NPI 1518200377

Chelsea R Tieszen, MD, MS is an Internal Medicine Physician in Portland, Oregon. Licensed in Oregon. Registered with an NPI since 2013.

Licensed in
OR
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

17727 E Burnside St
Portland, OR 97233-4803
Phone: (503) 215-9800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Geriatric Medicine (Internal Medicine) Physician (primary) Taxonomy 207RG0300X · Licence MD182564 (OR)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD182564 (OR)

Record details

NPI number1518200377
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD , MS
Sole proprietorNo
NPI enumeratedMarch 30, 2013
Last updated in NPPESOctober 25, 2024
Certification dateOctober 25, 2024

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