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

John D Oholleran, MD

Individual provider Surgery Physician · NPI 1912007220

John D Oholleran, MD is a General Surgery in Oregon City, Oregon. Graduated from University of Nebraska College of Medicine in 1987, 39 years ago. Practices with Providence Health and Services Oregon, a 1,426-clinician group and accepts Medicare assignment. Licensed in California, Illinois and Oregon.

Years since qualifying
39
Trained at
University of Nebraska College of Medicine
Licensed in
CA, IL, OR
In the registry since
2006
Specialties on file
4
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

1510 Division St Ste 210
Oregon City, OR 97045-1599
Phone: (503) 723-6525
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence MD215189 (OR)
Surgery Physician Taxonomy 208600000X · Licence 6073614 (CA)
Surgery Physician Taxonomy 208600000X · Licence G73614 (CA)
Surgery Physician Taxonomy 208600000X · Licence 036150765 (IL)

Record details

NPI number1912007220
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 25, 2006
Last updated in NPPESFebruary 2, 2024
Certification dateJune 6, 2022
Mailing addressPo Box 3158, Portland, OR 97208-3158

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE
Graduated 1987 (39 years in practice)
Group practice Providence Health And Services Oregon — 1426 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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