Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Thomas Harry Johnson, MD

Individual provider Radiation Oncology Physician · NPI 1083601835

Thomas Harry Johnson, MD practises Radiation Oncology in Portland, Oregon. Graduated from Virginia Commonwealth University, School of Medicine in 1979, 47 years ago. Practices with Kaiser Foundation Health Plan of the Northwest, a 1,811-clinician group and accepts Medicare assignment. Licensed in Oregon.

Years since qualifying
47
Trained at
Virginia Commonwealth 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

3620 N Interstate Ave
Portland, OR 97227-1106 Not confirmed with CMS for 13 years — call before visiting
Phone: (503) 280-2931
Fax: (503) 280-2938
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD13590 (OR)
Therapeutic Radiology Physician Taxonomy 2085R0203X · Licence MD13590 (OR)

Record details

NPI number1083601835
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2005
Last updated in NPPESDecember 11, 2012

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolVIRGINIA COMMONWEALTH UNIVERSITY, SCHOOL OF MEDICINE
Graduated 1979 (47 years in practice)
Group practice Kaiser Foundation Health Plan Of The Northwest — 1811 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients13
Services billed 56 a service is one billed item, such as a visit, a test or a procedure
Average patient age67

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Kaiser Foundation Health Plan of the Northwest

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1811 clinicians in the practice; 12 are shown here.

Other providers in Portland