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GREGORY S WILLIS M.D.
NPI 1417941600
Radiology - Radiation Oncology in Tualatin, OR

Active since September 02, 2005PECOS EnrolledAccepts Medicare Assignment
6489 SW BORLAND RD, TUALATIN, OR 97062(503) 692-4843(503) 692-6543 Get Directions Write a Review

NPPES record last updated: July 31, 2025. Verified against the NPPES registry weekly; last sync: July 19, 2026.

About Gregory S Willis M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREGORY S WILLIS M.D. (NPI 1417941600) is an individual radiation oncology provider in Tualatin, Oregon, licensed in Oregon (MD28019) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Christus St Vincent Regional Medical Center, and is a graduate of Oregon Health Sciences University School Of Medicine (1999).

NPPES Registry Identity

NPI1417941600
Entity TypeIndividualMale
Primary Taxonomy2085R0001X
Provider Legal NameGREGORY S WILLISCredential: M.D.
Location Address6489 SW BORLAND RDTualatin, OR 97062-9798
Mailing Address6489 Sw Borland RdTualatin, OR 97062-9798 · (503) 692-4843 · Fax (503) 692-6543
Phone(503) 692-4843
Fax(503) 692-6543
Sole ProprietorNo
Medical School CMSOregon Health Sciences University School Of MedicineGraduated 1999
Enumeration DateSeptember 2, 2005
Last NPPES UpdateJuly 31, 2025
NPPES CertifiedJuly 31, 2025
✔ NPI 1417941600 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyRadiology · Radiation OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0001X
Licenses✔ Licensed in OR · MD28019✔ Licensed in NM · MD2016-0015
Definition

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

Also ListedRadiologic Technologist · Radiation TherapyTaxonomy 2471R0002X · License MD28019 (OR)
6489 SW BORLAND RD, Tualatin, OR 97062
Open in Google Maps ↗

Other Identifiers 2

Other140838OR · Medicare Ptan
Other033138015OR · Regence Bcbs

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gregory S Willis M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7012902315
PECOS Enrollment IDI20160506000139
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ct guidance for insertion of radiation therapy fields 77014
CT guidance for insertion of radiation therapy fields involves using a CT scan to accurately map the area of your body where radiation will be applied. This ensures the radiation targets only the necessary area, minimizing impact to healthy tissues.
224 services15 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
106 services97 patients
Calculation of radiation therapy dose 77300
Radiation therapy dose calculation is a process to determine the exact amount of radiation needed to treat a specific area in the body. This calculation helps ensure the treatment is effective while minimizing harm to healthy tissues. It's a key part of planning your radiation therapy.
93 services19 patients
Design and construction of complex radiation treatment device 77334
The design and construction of a complex radiation treatment device is a process where a specialized instrument is created. This device targets harmful cells with high-energy rays to destroy or damage them, while minimizing impact on healthy cells. This aids in treating conditions like cancer.
81 services22 patients
Radiation treatment management, 5 treatment sessions 77427
Radiation treatment management involves a series of 5 sessions where targeted radiation is used to destroy or shrink cancer cells in your body. Each session is carefully planned to maximize effectiveness while minimizing harm to healthy tissues. You may experience side effects which will be closely monitored and managed for your comfort.
78 services21 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
26 services26 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Christus St Vincent Regional Medical Center

Acute Care Hospitals · Santa Fe, NM
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number320002
Location455 St Michael's DriveSanta Fe, NM 87505 · Santa Fe County
Emergency services Birthing friendly

Gerald Champion Regional Medical Center

Acute Care Hospitals · Alamogordo, NM
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number320004
Location2669 Scenic DriveAlamogordo, NM 88310 · Otero County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97062 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$176.88 typical visit price
range $58.99 – $176.88
Typical copayment $44.22 (range $14.74 – $44.22)
Most-billed visit code 99205
Established Patient
$73.28 typical visit price
range $19.32 – $144.79
Typical copayment $18.32 (range $4.83 – $36.19)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MERIDIAN PARK RADIATION ONCOLOGY CENTER, INC.
Clinic/Center (Oncology, Radiation)
6489 SW BORLAND RD
TUALATIN, OR 97062
Washington County (503) 692-4843
MERIDIAN PARK ONCOLOGY LLC
Radiology (Radiation Oncology)
6489 SW BORLAND RD
TUALATIN, OR 97062
Washington County (503) 692-4843
MERIDIAN PARK RADIATION ONCOLOG CENTER, INC
Clinic/Center (Oncology, Radiation)
6489 SW BORLAND RD
TUALATIN, OR 97062
Washington County (503) 692-4843

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gregory Willis's NPI number?

The NPI number for Gregory Willis is 1417941600. It was assigned to this individual provider in the NPPES registry on September 2, 2005.

Where is Gregory Willis located?

Gregory Willis practices at 6489 SW Borland Rd, Tualatin, OR 97062. The listed phone number is (503) 692-4843.

What is Gregory Willis's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.

Is Gregory Willis enrolled in Medicare?

Yes. Gregory Willis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Gregory Willis accept?

Health plans from Blue Cross and Blue Shield of Texas list Gregory Willis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Gregory Willis affiliated with any hospitals?

According to CMS data, Gregory Willis is affiliated with Christus St Vincent Regional Medical Center and Gerald Champion Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Gregory Willis was last updated on July 31, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.