National Provider Identifier Database

GREGORY S WILLIS, MD – NPI #1417941600
Radiation Oncology

A radiologist who deals with the therapeutic applications of radiant energy and its modifiers and the study and management of disease, especially malignant tumors.


Contact Information

GREGORY S WILLIS, MD
6489 SW BORLAND RD
TUALATIN, OR97062-9798
Phone: 503-692-4843
Fax: 503-692-6543
Website:
Specialty Taxonomy Code
* Radiation Oncology 2085R0001X
Radiation Therapy Radiologic Technologist 2471R0002X

* Indicates primary specialty

NPI Profile & details for GREGORY S WILLIS

NPI Number 1417941600
Credentials MD
Entity Individual
Enumeration date 09/02/2005
Last updated 07/31/2025 - About 10 months ago
Sole proprietor1 No
Identifiers
  • NM License #: MD2016-0015
  • OR License #: MD28019
  • OR Other: 140838 MEDICARE PTAN
  • OR Other: 033138015 REGENCE BCBS
Hospital affiliation n/a

1 A sole proprietor/sole proprietorship is an individual, and as such, is eligible for a single NPI number. The sole proprietor must apply for the NPI number using his or her own Social Security Number (SSN), not an Employer Identification Number (EIN) even if he/she has an EIN.

Reviews for GREGORY S WILLIS, MD

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