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

Mark D Hamilton, MD

Individual provider Anesthesiology Physician · NPI 1003939737

Mark D Hamilton, MD practises Anesthesiology in Salem, Virginia. Graduated from University of Louisville School of Medicine in 2001, 25 years ago. Practices with Gastroenterology Consultants Of, a 16-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
25
Trained at
University of Louisville School of Medicine
Licensed in
VA
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1900 Electric Rd Anesthesia Dept
Salem, VA 24153-7474 Not confirmed with CMS for 15 years — call before visiting
Phone: (540) 776-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 0101244466 (VA)

Record details

NPI number1003939737
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 9, 2007
Last updated in NPPESJanuary 27, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF LOUISVILLE SCHOOL OF MEDICINE
Graduated 2001 (25 years in practice)
Group practice Gastroenterology Consultants Of — 16 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients19
Services billed 19 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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.

Food and Beverage $380 19 payments · 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.

Colleagues at Gastroenterology Consultants Of

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 16 clinicians in the practice; 11 are shown here.

Other providers in Salem