Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Gregory James Thomas, DDS, MS

Individual provider Oral and Maxillofacial Surgery (Dentist) · NPI 1912947227

Dr. Gregory James Thomas, DDS, MS is registered under Oral and Maxillofacial Surgery (Dentist) in Warren, Michigan. Licensed in Michigan. Registered with an NPI since 2006.

Licensed in
MI
In the registry since
2006
Specialties on file
2
What do these letters mean?
DDS — Doctor of Dental Surgery
A dentist. DDS and DMD are the same qualification — universities choose which title to award.
MS — Master of Science
A graduate science degree.

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Practice location Address checks out

29427 Ryan Rd
Warren, MI 48092-2203 Not confirmed with CMS for 11 years — call before visiting
Phone: (586) 755-9340
Fax: (586) 755-1081
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Oral & Maxillofacial Surgery (D.M.D.) (primary) Taxonomy 204E00000X · Licence 2901013883 (MI)
Oral and Maxillofacial Surgery (Dentist) Taxonomy 1223S0112X · Licence 2901013883 (MI)

Record details

NPI number1912947227
Entity typeIndividual (Type 1)
GenderMale
Credentials DDS , MS
Sole proprietorNo
NPI enumeratedJune 7, 2006
Last updated in NPPESAugust 10, 2015

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Gift $69 1 payment
Food and Beverage $36 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

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