Thomas C. Guernsey, DDS
- Part D claims, 2024
- 120
- Industry payments
- $9
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 521 Summit St, Fostoria, OH 44830-1527
- Practice phone
- Call (419) 435-3255
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Tri-county Dental Center
Dental practice · Fostoria, Ohio
Find Thomas Guernsey's 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.
Thomas C. Guernsey is a general practice dentistry in Fostoria, Ohio
Thomas Guernsey practices at Tri-county Dental Center in Fostoria, Ohio.
Thomas Guernsey's NPI, 1407865512, was assigned on August 7, 2006. Thomas Guernsey holds Ohio license 22328.
- NPI
- 1407865512NPI Registry (opens in a new tab)
- NPI enumeration date
- August 7, 2006
- NPI status
- Active
- Practice phone
- (419) 435-3255
- 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)
Thomas C. Guernsey practices at 2 locations in Fostoria, Ohio
Thomas Guernsey's primary practice is Tri-county Dental Center, at 521 Summit St, Fostoria, OH 44830-1527. The practice phone is (419) 435-3255. The NPI Registry lists Thomas Guernsey's practice address as 501 Van Buren St, Fostoria, OH 44830.
- Tri-county Dental CenterPrimary521 Summit St, Fostoria, OH 44830-1527Phone(419) 435-3255
- NPI Registry address501 Van Buren St, Fostoria, OH 44830 · Seneca County
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Thomas C. Guernsey is affiliated with 1 site of care and 1 medical group
Thomas Guernsey's primary practice is Tri-county Dental Center in Fostoria, Ohio. Dmand AI also links Thomas Guernsey 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 Thomas C. Guernsey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Thomas Guernsey practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Tri-county Dental Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Thomas C. Guernsey is one of 1,843 general practice dentistrys in Ohio
General practice is Thomas Guernsey's primary specialty in the NPI Registry, under taxonomy code 1223G0001X. Thomas Guernsey is licensed in Ohio.
Specialties and state licenses
- General practice dentistry, OhioPrimary
General practice dentistrys near Thomas Guernsey
Counts of general practice dentistrys 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
Thomas C. Guernsey's patients have a median age of 72
Across all payers, Dmand AI patient panel data puts Thomas Guernsey's median patient age at 72, with 100% women.
Thomas Guernsey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Thomas C. Guernsey wrote 120 Medicare Part D claims in 2024
In 2024, Thomas Guernsey wrote 120 Medicare Part D claims for 78 patients. 100% of them were for generic drugs.
Drug classes CMS tracks in Thomas Guernsey's Part D claims, 2024
- Antibiotics83%100 of 120 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Thomas C. Guernsey received $9 in industry payments in 2025
CMS Open Payments shows 1 general payment to Thomas Guernsey from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Align Technology, Inc. paid the most, $9.
Companies that paid Thomas Guernsey the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Thomas C. Guernsey'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| 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 (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 Thomas C. Guernsey
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Thomas C. Guernsey's NPI number?
Thomas C. Guernsey's NPI number is 1407865512. It was assigned on August 7, 2006, and it is active in the NPI Registry.
What does Thomas C. Guernsey specialize in?
Thomas C. Guernsey is a general practice dentistry in Fostoria, Ohio. The primary specialty in the NPI Registry is General Practice Dentistry (taxonomy code 1223G0001X).
Where does Thomas C. Guernsey practice?
Thomas Guernsey practices at 521 Summit St, Fostoria, OH 44830-1527. Thomas Guernsey also practices at 501 Van Buren St, Fostoria, OH 44830. Thomas Guernsey's primary practice is Tri-county Dental Center in Fostoria, Ohio. Dmand AI also links Thomas Guernsey to 1 medical group.
What is Thomas C. Guernsey's office phone number?
The practice phone on file for Thomas Guernsey is (419) 435-3255.
What is Thomas C. Guernsey's medical license number?
Thomas Guernsey holds Ohio license 22328.
Has Thomas C. Guernsey received payments from drug or device companies?
CMS Open Payments shows $9 in general payments to Thomas Guernsey from 1 company from 2025 to 2025. The largest total came from Align Technology, Inc.
How long has Thomas C. Guernsey been practicing?
Thomas Guernsey's NPI was assigned in 2006.
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