Dr. Gregory M. Thomas, MD
- Part D claims, 2019
- 12
- Industry payments
- $362
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 5100 River Rd N, Keizer, OR 97303-5371
- Practice phone
- Call (503) 393-2533
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Keizer Family Physicians
Primary care practice · Keizer, Oregon
Find Dr. Thomas' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory M. Thomas is a family medicine physician in Keizer, Oregon
Dr. Thomas practices at Keizer Family Physicians in Keizer, Oregon.
Dr. Thomas' NPI, 1376585448, was assigned on June 12, 2006. Dr. Thomas holds Oregon license 13584.
- NPI
- 1376585448NPI Registry (opens in a new tab)
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Practice phone
- (503) 393-2533
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory M. Thomas practices at Keizer Family Physicians in Keizer, Oregon
Dr. Thomas' primary practice is Keizer Family Physicians, at 5100 River Rd N, Keizer, OR 97303-5371. The practice phone is (503) 393-2533.
- Keizer Family Physicians5100 River Rd N, Keizer, OR 97303-5371Phone(503) 393-2533
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory M. Thomas is affiliated with 1 site of care and 1 medical group
Dr. Thomas' primary practice is Keizer Family Physicians in Keizer, Oregon. Dmand AI also links Dr. Thomas to 1 medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Gregory M. Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Keizer Family Physicians | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory M. Thomas is one of 2,398 family medicine physicians in Oregon
Family medicine is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Thomas is licensed in Oregon.
Specialties and state licenses
- Family medicine, OregonPrimary
Family medicine physicians near Dr. Thomas
Counts of family medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory M. Thomas' patients have a median age of 81
Across all payers, Dmand AI patient panel data puts Dr. Thomas' median patient age at 81, with 100% women.
Dr. Thomas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 81
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Gregory M. Thomas wrote 12 Medicare Part D claims in 2019
In 2019, Dr. Thomas wrote 12 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $131 in total drug cost. In 2018, CMS named 12 claims across 1 drug.
Dr. Thomas' most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 122019: 12No change
Drugs named by CMS: 1 in 2019, 1 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gregory M. Thomas received $362 in industry payments from 2017 to 2022
CMS Open Payments shows 4 general payments to Dr. Thomas from 3 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. Amgen Inc. paid the most, $225.
General payments to Dr. Thomas by program year, 2017 to 2022
Companies that paid Dr. Thomas the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory M. Thomas's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory M. Thomas
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory M. Thomas' NPI number?
Dr. Gregory M. Thomas' NPI number is 1376585448. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory M. Thomas?
Dr. Gregory M. Thomas is a family medicine physician in Keizer, Oregon. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gregory M. Thomas practice?
Dr. Thomas practices at 5100 River Rd N, Keizer, OR 97303-5371. Dr. Thomas' primary practice is Keizer Family Physicians in Keizer, Oregon. Dmand AI also links Dr. Thomas to 1 medical group.
What is Dr. Gregory M. Thomas' office phone number?
The practice phone on file for Dr. Thomas is (503) 393-2533.
What is Dr. Gregory M. Thomas' medical license number?
Dr. Thomas holds Oregon license 13584.
What drugs does Dr. Gregory M. Thomas prescribe most?
In 2019 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Metoprolol Succinate.
Has Dr. Gregory M. Thomas received payments from drug or device companies?
CMS Open Payments shows $362 in general payments to Dr. Thomas from 3 companies from 2017 to 2022. The largest total came from Amgen Inc.
How long has Dr. Gregory M. Thomas been practicing?
Dr. Thomas' NPI was assigned in 2006.
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