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

Grant Harmon, MD

Individual provider Radiation Oncology Physician · NPI 1639606379

Grant Harmon, MD is a Radiation Oncology in Gresham, Oregon. Graduated from Loyola University of Chicago, Stritch School of Medicine in 2017, 9 years ago. Practices with Legacy Clinics LLC, a 718-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Illinois and Oregon.

Years since qualifying
9
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL, OR
In the registry since
2017
Specialties on file
3
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

24950 SE Stark St
Gresham, OR 97030
Phone: (503) 674-1152
Show map & directions

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

Additional practice locations (3)

  • 510 Sw Ramsey Ave, Grants Pass, OR 97527-5554 — (541) 789-4673
  • 2825 E Barnett Rd, Medford, OR 97504-8332 — (541) 789-7000
  • 940 Royal Ave, Medford, OR 97504-6193 — (541) 732-7000

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD209685 (OR)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 125071100 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1639606379
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 12, 2017
Last updated in NPPESJune 6, 2025
Certification dateJune 6, 2025
Mailing addressPo Box 3777, Portland, OR 97208-3777

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 2017 (9 years in practice)
Group practice Legacy Clinics Llc — 718 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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