Quick answers
- Where does Robert Antoniuk see patients?
- Medicare's clinician data lists 3 practice locations, including Largo, MD, Woodbridge, VA and Mc Lean, VA. Call before your visit to confirm the address.
- What is Robert Antoniuk's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Robert Antoniuk accept Medicare assignment?
- Yes. Medicare's clinician data says Robert Antoniuk accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Robert Antoniuk?
- (301) 618-5700, as listed in official Medicare / NPI Registry data.
- What is Robert Antoniuk's NPI number?
- 1285849117. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Robert Antoniuk is enrolled with Medicare (CMS data updated 2026-10-02).
- 1221 Mercantile LnLargo, MD 20774 (301) 618‑5700
- 14139 Potomac Mills RdWoodbridge, VA 22192 (703) 257‑3000
- 8008 Westpark DrMc Lean, VA 22102 (703) 287‑6400
Group practices
Medicare enrollment lists Robert Antoniuk as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Largo
Clinicians with the same Medicare primary specialty in Largo, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285849117 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians