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

Mr. Dennis O. Mayer, MD

Individual provider Internal Medicine Physician · NPI 1235112723

Mr. Dennis O. Mayer, MD is an Internal Medicine Physician in Milwaukie, Oregon. Licensed in Oregon. Registered with an NPI since 2005.

Licensed in
OR
In the registry since
2005
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

10024 SE 32nd Ave
Milwaukie, OR 97222-6514
Phone: (503) 659-4988
Fax: (503) 654-5666
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 MD10890 (OR)

Record details

NPI number1235112723
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 29, 2005
Last updated in NPPESAugust 2, 2010

Other providers in Milwaukie