Warren Joseph Marion, M.D.
Internal Medicine Physician · Leesburg, VA
Warren Joseph Marion, M.D. is an internal medicine physician with a practice address in Leesburg, Virginia, and NPI 1033679063, issued on Mar 25, 2019. Check the license (Virginia 0101053454, as entered in NPPES) on the Virginia Department of Health Professions; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Warren Joseph Marion
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 0101053454 VA
Self-reported in NPPES; status is on the state search - Practice location
- 38483 Forest Mills RD, Leesburg, VA 20175
- Phone
- (540) 338-3447
- Enumerated
- Mar 25, 2019
- Record last updated
- Mar 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (540) 338-3447
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,599 in Virginia → Look up another NPI →
Verify Warren Joseph Marion in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101053454Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Warren Joseph Marion among 3,599 internal medicine physician records in Virginia
Warren Joseph Marion, M.D. 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 not. Its NPI, issued in 2019, is newer than 83% of them.
- NPI issued2019 · 83% of these records are older, 14% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2019 · 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).
47 internal medicine physician records list a practice address in Leesburg
They are 47 of the 1,759 NPPES records with a practice address in Leesburg, and 3,599 internal medicine physician records in Virginia. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 3,599 in Virginia → Every provider in Leesburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Syed Ishaq, MDLeesburg, VA 201751588697668
- Kajal Roy, M.D.Leesburg, VA 201751013246008
- John Andrew, MDLeesburg, VA 201761700870755
- Sandhya Chanda, MDLeesburg, VA 201761043219710
- Sarfraz Choudhary, MDLeesburg, VA 201761619960242
- John Cook, MDLeesburg, VA 201761811981897
- Richard Kim, MDLeesburg, VA 201761902890981
- Martin Korkowski, MDLeesburg, VA 201761801880752
Common questions
What is Warren Joseph Marion, M.D.'s NPI number?
Warren Joseph Marion, M.D.'s National Provider Identifier (NPI) is 1033679063, issued on Mar 25, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Warren Joseph Marion, M.D. located?
The NPPES record lists a practice address at 38483 Forest Mills RD, Leesburg, VA, 20175. Phone: (540) 338-3447. Providers update this record themselves, so call before visiting.
How can I verify Warren Joseph Marion, M.D.'s license?
NPPES lists Virginia license number 0101053454, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.