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STEPHEN J ANTONIK MD
NPI 1770567257
Internal Medicine - Gastroenterology in Leesburg, VA

Active since November 30, 2005PECOS EnrolledAccepts Medicare Assignment
19500 SANDRIDGE WAY STE 470, LEESBURG, VA 20176(703) 771-9001(703) 771-9076 Get Directions Write a Review

NPPES record last updated: October 6, 2021. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Oct 6, 2021, Aug 23, 2021 (2 updates tracked since 2021).

About Stephen J Antonik Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

STEPHEN J ANTONIK MD (NPI 1770567257) is an individual gastroenterology provider in Leesburg, Virginia, licensed in Virginia (0101245281) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Winchester Medical Center, and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2002).

NPPES Registry Identity

NPI1770567257
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameSTEPHEN J ANTONIKCredential: MD
Location Address19500 SANDRIDGE WAY STE 470Leesburg, VA 20176-3694
Mailing Address19500 Sandridge Way Ste 470Leesburg, VA 20176-3694 · (703) 771-9001 · Fax (703) 771-9076
Phone(703) 771-9001
Fax(703) 771-9076
Sole ProprietorNo
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2002
Enumeration DateNovember 30, 2005
Last NPPES UpdateOctober 6, 20212 updates tracked since enumeration
NPPES CertifiedOctober 6, 2021
✔ NPI 1770567257 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in VA · 0101245281
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036113018 (IL)
19500 SANDRIDGE WAY STE 470, Leesburg, VA 20176
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stephen J Antonik Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4486670288
PECOS Enrollment IDI20090729000494, I20250909004235
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
92 services62 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
73 services58 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
66 services64 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
41 services40 patients
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
21 services19 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Winchester Medical Center

Acute Care Hospitals · Winchester, VA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490005
Location1840 Amherst StWinchester, VA 22601 · Winchester City County
Emergency services Birthing friendly

Inova Loudoun Hospital

Acute Care Hospitals · Leesburg, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490043
Location44045 Riverside ParkwayLeesburg, VA 20176 · Loudoun County
Emergency services Birthing friendly

Reston Hospital Center

Acute Care Hospitals · Reston, VA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490107
Location1850 Town Center ParkwayReston, VA 20190 · Fairfax County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20176 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$129.04 typical visit price
range $56.19 – $170.30
Typical copayment $32.26 (range $14.04 – $42.57)
Most-billed visit code 99204
Established Patient
$99.13 typical visit price
range $18.07 – $138.91
Typical copayment $24.78 (range $4.51 – $34.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GASTROENTEROLOGY ASSOCIATES PLLC
Internal Medicine (Gastroenterology)
19500 SANDRIDGE WAY STE 470
LEESBURG, VA 20176
Loudoun County (703) 771-9001

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Stephen Antonik's NPI number?

The NPI number for Stephen Antonik is 1770567257. It was assigned to this individual provider in the NPPES registry on November 30, 2005.

Where is Stephen Antonik located?

Stephen Antonik practices at 19500 Sandridge Way Ste 470, Leesburg, VA 20176. The listed phone number is (703) 771-9001.

What is Stephen Antonik's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Stephen Antonik enrolled in Medicare?

Yes. Stephen Antonik is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Stephen Antonik affiliated with any hospitals?

According to CMS data, Stephen Antonik is affiliated with Winchester Medical Center, Inova Loudoun Hospital and Reston Hospital Center.

When was this NPI record last updated?

The NPPES record for Stephen Antonik was last updated on October 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.