Grant Harmon, MD
Radiation Oncology Physician · Gresham, OR
Grant Harmon, MD is a radiation oncology physician with a practice address in Gresham, Oregon, and NPI 1639606379, issued on May 12, 2017. Check the license (Oregon MD209685, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Grant Harmon
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD209685 OR
125071100 IL
Self-reported in NPPES; status is on the state search - Practice location
- 24950 SE Stark St, Gresham, OR 97030
- Phone
- (503) 674-1152
- Enumerated
- May 12, 2017
- Record last updated
- Jun 6, 2025
- Medicare enrollment
- Enrolled (PECOS I20220526001108); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2017
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 115 in Oregon → Look up another NPI →
Also registered at 24950 SE Stark St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathryn Panwala, M.D.Radiation Oncology Physician1972591618
Verify Grant Harmon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD209685Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average radiation oncology physician in 2024
186 Medicare Part D claims for 102 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 13 claims were for opioids.
Most prescribed
- Tamsulosin Hcl42 claims
- Mometasone Furoate30 claims
- Dexamethasone15 claims
- Venlafaxine Hcl Er13 claims
- Lidocaine Hcl Viscous11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Legacy Clinics LLCPortland, OR
- Radiation Oncology Group Consultants P CMedford, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant Harmon among 115 radiation oncology physician records in Oregon
Grant Harmon, MD is one of 115 radiation oncology physician records with a practice address in Oregon. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 84% of them.
- NPI issued2017 · 84% of these records are older, 10% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2017 · median 2006 among the 85 with a school on file
- Record last updated2025 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Oregon
There are 115 radiation oncology physician records in Oregon.
All 115 in Oregon → Every provider in Gresham → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Kathryn Panwala, M.D.Gresham, OR 970301972591618
- Jerald Albrich, M.D.Canby, OR 970131952467607
- Keith Stelzer, M.D., PH.D.The Dalles, OR 970581881682573
- Gregory Willis, M.D.Tualatin, OR 970621417941600
- Margaret Thompson, M.D.Amity, OR 971011982702221
- Pehr Hartvigson, MDAstoria, OR 971031750700498
- Timur Mitin, M.D., PH.D.Hillsboro, OR 971231679745822
- Aasheeshraj Kanwar, M.D.McMinnville, OR 971281861925778
Common questions
What is Grant Harmon, MD's NPI number?
Grant Harmon, MD's National Provider Identifier (NPI) is 1639606379, issued on May 12, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Grant Harmon, MD located?
The NPPES record lists a practice address at 24950 SE Stark St, Gresham, OR, 97030. Phone: (503) 674-1152. Providers update this record themselves, so call before visiting.
How can I verify Grant Harmon, MD's license?
NPPES lists Oregon license number MD209685, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grant Harmon, MD prescribe under Medicare Part D?
In 2024, Grant Harmon, MD had 186 Medicare Part D claims for 102 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.