Stephen J. Antonik, MD
Gastroenterology Physician · Leesburg, VA
Stephen J. Antonik, MD is a gastroenterology physician with a practice address in Leesburg, Virginia, and NPI 1770567257, issued on Nov 30, 2005. Check the license (Virginia 0101245281, as entered in NPPES) on the Virginia Department of Health Professions; the Medicare figures below come from public CMS files.
- Name
- Stephen J. Antonik
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 0101245281 VA
036113018 IL
Self-reported in NPPES; status is on the state search - Practice location
- 19500 Sandridge Way Ste 470, Leesburg, VA 20176
- Phone
- (703) 771-9001
- Enumerated
- Nov 30, 2005
- Record last updated
- Oct 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (703) 771-9076
- Medicare enrollment
- Enrolled (PECOS I20250909004235); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 536 in Virginia → Look up another NPI →
Verify Stephen J. Antonik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersVirginia Department of Health Professions
Search for license 0101245281Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average gastroenterology physician in 2024
166 Medicare Part D claims for 74 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Omeprazole58 claims
- Sod Sulf-Potass Sulf-Mag Sulf31 claims
- Pantoprazole Sodium16 claims
- Peg 3350-Electrolyte14 claims
- Sutab11 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.
Stephen J. Antonik among 536 gastroenterology physician records in Virginia
Stephen J. Antonik, MD is one of 536 gastroenterology physician records with a practice address in Virginia. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 83% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2002 · median 2001 among the 389 with a school on file
- Record last updated2021 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Virginia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Virginia
There are 536 gastroenterology physician records in Virginia.
All 536 in Virginia → Every provider in Leesburg → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Won Cho, M.D.Leesburg, VA 201761629032784
- Hiwot Desta, MDLansdowne, VA 201761558321091
- Satinder Gill, MDLansdowne, VA 201761487614913
- Ahmed Hamed, M.D.Leesburg, VA 201761053763276
- Rahul Kataria, M.D.Lansdowne, VA 201761538401831
- Nadeem Khan, MDLeesburg, VA 201761396708392
- Anita Kumar, M.D.Leesburg, VA 201761154581502
- Robert Lafsky, M.D.Leesburg, VA 201761336124163
Common questions
What is Stephen J. Antonik, MD's NPI number?
Stephen J. Antonik, MD's National Provider Identifier (NPI) is 1770567257, issued on Nov 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Stephen J. Antonik, MD located?
The NPPES record lists a practice address at 19500 Sandridge Way Ste 470, Leesburg, VA, 20176. Phone: (703) 771-9001. Providers update this record themselves, so call before visiting.
How can I verify Stephen J. Antonik, MD's license?
NPPES lists Virginia license number 0101245281, 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 Stephen J. Antonik, MD prescribe under Medicare Part D?
In 2024, Stephen J. Antonik, MD had 166 Medicare Part D claims for 74 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.