Grant Harmon, MD
Grant Harmon is a Radiation Oncology Physician provider (Radiology) practicing in Gresham, OR, registered in the NPPES registry with NPI 1639606379 since 2017. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1639606379 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Grant Harmon |
| Credential | MD |
| Sex | Male |
| Practice address | 24950 SE STARK ST, Gresham, OR, 97030 |
| Phone | 5036741152 |
| Enumeration date | 2017-05-12 |
| Last updated in NPPES | 2025-06-06 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2085R0001X | Radiation Oncology Physician | Secondary | 125071100 | IL |
| 390200000X | Student in an Organized Health Care Education/Training Program | Secondary | — | — |
| 2085R0001X | Radiation Oncology Physician | Primary | MD209685 | OR |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: Grant Harmon, MD NPI: 1639606379 Taxonomy: 2085R0001X (Radiation Oncology Physician) Address: 24950 SE STARK ST, Gresham, OR, 97030
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1972591618 | Kathryn Panwala | Individual | Radiation Oncology Physician | Gresham, OR |
Verify this record
Cross-check NPI 1639606379 against the authoritative CMS record: view Grant Harmon on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-06-06.