Marcos Daniel Villarreal, MD
Internal Medicine Physician · Fredericksburg, VA
Marcos Daniel Villarreal, MD is an internal medicine physician with a practice address in Fredericksburg, Virginia, and NPI 1265095160, issued on Apr 16, 2019. Check the license (Virginia 0101284157, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Marcos Daniel Villarreal
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 0101284157 VA
35091 NH
C1-0028811 DE
BP10067181 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1101 Sam Perry Blvd Ste 305, Fredericksburg, VA 22401
- Phone
- (540) 374-3290
- Enumerated
- Apr 16, 2019
- Record last updated
- Dec 16, 2025
- Medicare enrollment
- Enrolled (PECOS I20250731002913); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
Also registered at 1101 Sam Perry Blvd Ste 305
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Christopher Sonnier, MD, FACE, ECNUEndocrinology, Diabetes & Metabolism Physician1598732513
Verify Marcos Daniel Villarreal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101284157Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average internal medicine physician in 2024
385 Medicare Part D claims for 172 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 71% of claims.
Most prescribed
- Ozempic44 claims
- Levothyroxine Sodium33 claims
- Tresiba Flextouch U-10032 claims
- Synjardy Xr24 claims
- Trulicity18 claims
- Lantus Solostar17 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
2 hospitals and group practices
- Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospitals3 of 5 stars
- Beebe Physician Network Inc.Lewes, DE
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Marcos Daniel Villarreal among 3,599 internal medicine physician records in Virginia
Marcos Daniel Villarreal, MD is one of 3,599 internal medicine physician records with a practice address in Virginia. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 83% of them.
- NPI issued2019 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2019 · median 2003 among the 2,234 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
64 internal medicine physician records list a practice address in Fredericksburg
They are 64 of the 3,696 NPPES records with a practice address in Fredericksburg, and 3,599 internal medicine physician records in Virginia.
All 3,599 in Virginia → Every provider in Fredericksburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Matthew Aiken, DOFredericksburg, VA 224011063488450
- Abla Awadh, M.D.Fredericksburg, VA 224011548282676
- Norman Chang, M.D.Fredericksburg, VA 224011629064605
- Joseph Ferguson, M.D.Fredericksburg, VA 224011811986441
- Diane Franchi, M.D.Fredericksburg, VA 224011538159199
- Vikas Gupta, MDFredericksburg, VA 224011710974167
- Rosemary Iwunze, MDFredericksburg, VA 224011205950284
- Diego Martinez-Vasquez, M.D.Fredericksburg, VA 224011063483188
Common questions
What is Marcos Daniel Villarreal, MD's NPI number?
Marcos Daniel Villarreal, MD's National Provider Identifier (NPI) is 1265095160, issued on Apr 16, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Marcos Daniel Villarreal, MD located?
The NPPES record lists a practice address at 1101 Sam Perry Blvd Ste 305, Fredericksburg, VA, 22401. Phone: (540) 374-3290. Providers update this record themselves, so call before visiting.
How can I verify Marcos Daniel Villarreal, MD's license?
NPPES lists Virginia license number 0101284157, 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.
How much does Marcos Daniel Villarreal, MD prescribe under Medicare Part D?
In 2024, Marcos Daniel Villarreal, MD had 385 Medicare Part D claims for 172 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.