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

Mark S. Twedt, MD

Individual provider Diagnostic Radiology Physician · NPI 1811293525

Mark S. Twedt, MD practises Diagnostic Radiology in Richmond, Virginia. Graduated from Mercer University School of Medicine in 2011, 15 years ago. Practices with Radiology Associates of North Georgia, a 36-clinician group and accepts Medicare assignment. Licensed in Virginia.

Years since qualifying
15
Trained at
Mercer University School of Medicine
Licensed in
VA
In the registry since
2011
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

1250 E Marshall St Dept OF Radiology
Richmond, VA 23298-5051 Not confirmed with CMS for 10 years — call before visiting
Phone: (804) 828-6831
Fax: (804) 628-1132
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 0101259401 (VA)

Record details

NPI number1811293525
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 28, 2011
Last updated in NPPESAugust 3, 2016

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolMERCER UNIVERSITY SCHOOL OF MEDICINE
Graduated 2011 (15 years in practice)
Group practice Radiology Associates Of North Georgia — 36 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients2,803
Services billed 4,461 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Radiology Associates of North Georgia

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 36 clinicians in the practice; 12 are shown here.

Other providers in Richmond