Mark S. Twedt, MD
Diagnostic Radiology Physician · Richmond, VA
Mark S. Twedt, MD is a diagnostic radiology physician with a practice address in Richmond, Virginia, and NPI 1811293525, issued on Jan 28, 2011. Check the license (Virginia 0101259401, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Mark S. Twedt
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 0101259401 VA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 E Marshall St, Richmond, VA 23298
- Phone
- (804) 828-6831
- Enumerated
- Jan 28, 2011
- Record last updated
- Aug 3, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (804) 628-1132
- Medicare enrollment
- Enrolled (PECOS I20170601000637); accepts Medicare assignment
- Medical or professional school
- Mercer University School Of Medicine, 2011
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 1,158 in Virginia → Look up another NPI →
Also registered at 1250 E Marshall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark S. Twedt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101259401Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Athens Radiology Associates PCAthens, GA
- Radiology Associates OF North GeorgiaAthens, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark S. Twedt among 1,158 diagnostic radiology physician records in Virginia
Mark S. Twedt, MD is one of 1,158 diagnostic radiology physician records with a practice address in Virginia. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 72% of them.
- NPI issued2011 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2011 · median 2004 among the 786 with a school on file
- Record last updated2016 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
191 diagnostic radiology physician records list a practice address in Richmond
They are 191 of the 14,083 NPPES records with a practice address in Richmond, and 1,158 diagnostic radiology physician records in Virginia.
All 1,158 in Virginia → Every provider in Richmond → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Kelley Allison, MDRichmond, VA 232981790796019
- Ahmet Baykal, M.D.Richmond, VA 232981942304274
- Laura Carucci, M.D.Richmond, VA 232981992809206
- Charles Cockrell, MDRichmond, VA 232981609829175
- Franklin Dana, M.D.Richmond, VA 232981508855909
- Stephen Foxx, MDRichmond, VA 232981154334597
- Ann Fulcher, M.D.Richmond, VA 232981093819237
- Michelle Garnett, M.D.Richmond, VA 232981518918218
Common questions
What is Mark S. Twedt, MD's NPI number?
Mark S. Twedt, MD's National Provider Identifier (NPI) is 1811293525, issued on Jan 28, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark S. Twedt, MD located?
The NPPES record lists a practice address at 1250 E Marshall St, Richmond, VA, 23298. Phone: (804) 828-6831. Providers update this record themselves, so call before visiting.
How can I verify Mark S. Twedt, MD's license?
NPPES lists Virginia license number 0101259401, as entered by the provider. Search the Virginia Department of Health Professions at https://dhp.virginiainteractive.org/lookup/index. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Mark S. Twedt, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.