Gregory S. Barnes, M.D.
Specialist
At a glance
- Medical school
- Baylor College of Medicine (1999)
- Years since graduation
- 27
- In the NPI registry since
- 2006
Licensed in Texas since 2004, according to the Texas Medical Board. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1999Medical school: Baylor College of Medicine
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Specialist primary
TX license L8610 (first issued 2004; active) -
Phlebology Physician
TX license L8610 (first issued 2004; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Mckenzie County Healthcare Systems Inc Watford City, ND
Medical groups
- Texas Group PLLC (13 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Pantoprazole Sodium Other prescribers in Tampa, FL | 61 |
| Omeprazole Other prescribers in Tampa, FL | 13 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 11 payments worth $1,315 in total to this clinician.
| Intuitive Surgical, Inc. | $1,299 |
|---|---|
| Intra-sana Laboratories | $15.74 |
| Travel and Lodging | $1,142 |
|---|---|
| Food and Beverage | $163 |
| Education | $9.78 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Intuitive Surgical, Inc. Aug 20, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $491 |
| Intuitive Surgical, Inc. Sep 9, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $342 |
| Intuitive Surgical, Inc. Sep 8, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $186 |
| Intuitive Surgical, Inc. Sep 8, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $75.00 |
| Intuitive Surgical, Inc. Aug 25, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $30.00 |
| Intuitive Surgical, Inc. Aug 20, 2025 | Travel and Lodging Da Vinci Surgical System · SURGERY · travel to MINNEAPOLIS, MN · in-kind | $19.00 |
| Intuitive Surgical, Inc. Oct 21, 2025 | Education Da Vinci Surgical System · SURGERY · in-kind | $9.78 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.