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

Dr. John Denker, MD

Individual provider Adult Medicine Physician · NPI 1942201546

Dr. John Denker, MD is a General Practice in Portland, Oregon. Graduated from Oregon Health Sciences University School of Medicine in 1980, 46 years ago. Practices with Marquis Clinical Services LLC, a 24-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
46
Trained at
Oregon Health Sciences University School of Medicine
Licensed in
OR
In the registry since
2005
Specialties on file
2
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

5622 SE 41st Ave
Portland, OR 97202-7516
Phone: (503) 774-6929
Fax: (503) 774-6924
Show map & directions

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

Specialties & licences

Adult Medicine Physician (primary) Taxonomy 207QA0505X · Licence MD 12668 (OR)
Geriatric Medicine (Family Medicine) Physician Taxonomy 207QG0300X · Licence MD 12668 (OR)

Record details

NPI number1942201546
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 3, 2005
Last updated in NPPESOctober 16, 2007
Mailing address5622 Se 41st Ave, Portland, OR 97202-7516

Medicare enrollment

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

Medicare specialtyGENERAL PRACTICE
Medical schoolOREGON HEALTH SCIENCES UNIVERSITY SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Marquis Clinical Services Llc — 24 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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