GREGORY S WILLIS (M.D.) – Radiation Oncology Physician, NPI 1417941600
Radiation Oncology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
111 RADIATION ONCOLOGY in OR
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Provider Addresses for GREGORY S WILLIS (M.D.)
6489, Southwest Borland Road, Tualatin, Metro, Clackamas County, Oregon, 97062, United States
TUALATIN, OR 970629798
Phone: (503) 692-4843
Fax: (503) 692-6543
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $38.
Total Amount is formed as General ($38) + Research ($0) + Ownership ($0) = $38.
Last reported payment date: 2023-05-05 • Largest payer in this snapshot: Janssen Biotech, Inc. ($38).
Total Amount
$38
General + Research + Ownership
Payments
2
Total payment records
General Amount
$38
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2023-05-05
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $38 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2016-05-06
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20160506000139 | I | Radiation Oncology | NM | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 77014 | Ct guidance for insertion of radiation therapy fields | 464 | 26 | $0 |
| 77334 | Design and construction of complex radiation treatment device | 196 | 45 | $0 |
| 77427 | Radiation treatment management, 5 treatment sessions | 194 | 46 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 178 | 144 | $0 |
| G6002 | Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 151 | 11 | $0 |
Insurance plans in this area (ZIP 97062)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| RADIATION ONCOLOGY | OR | 77427 | Radiation treatment management, 5 treatments | 189 | 83 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | NM | |
| Certified Registered Nurse Anesthetist (Crna) | NV | |
| Internal Medicine, Gastroenterology | NM | |
| General Surgery | NM | |
| O B S T E T R I C S/ G Y N E C O L O G Y | NM | |
| Nurse Practitioner | TX | |
| Family Practice | NM | |
| General Surgery | MI | |
| - | NM | |
| Cardiovascular Disease (Cardiology), Internal Medicine, Peripheral Vascular Disease | NM |
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