Quick answers
- Which hospitals does Aviva Ellenstein work at?
- Medicare's official clinician data lists Aviva Ellenstein at 1 hospital: Sibley Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aviva Ellenstein see patients?
- Medicare's clinician data lists 4 practice locations, including Rockville, MD, Bethesda, MD and Lanham, MD. Call before your visit to confirm the address.
- What is Aviva Ellenstein's specialty?
- Medicare lists Neurology as the primary specialty.
- Does Aviva Ellenstein accept Medicare assignment?
- Yes. Medicare's clinician data says Aviva Ellenstein 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.
- Does Aviva Ellenstein offer telehealth?
- Medicare's clinician data says Aviva Ellenstein offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Aviva Ellenstein?
- (301) 718-9611, as listed in official Medicare / NPI Registry data.
- What is Aviva Ellenstein's NPI number?
- 1134394836. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aviva Ellenstein works
Medicare's Facility Affiliation Data lists Aviva Ellenstein at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sibley Memorial HospitalWashington, DC · Acute Care Hospital · CCN 090005
Practice locations
Addresses where Aviva Ellenstein is enrolled with Medicare (CMS data updated 2026-10-02).
- 3202 Tower Oaks Blvd, Suite 300Rockville, MD 20852 (301) 718‑9611
- 6410 Rockledge Dr, Suite 600Bethesda, MD 20817
- 9470 Annapolis Rd, Suite 309Lanham, MD 20706 (202) 832‑1800
- 950 N Glebe Rd, Suite 700Arlington, VA 22203
Group practices
Medicare enrollment lists Aviva Ellenstein as a member of these groups (CMS data updated 2026-10-02).
- Privia Medical Group, LLC1,533 clinicians in the group
- Suburban/Nrh Medical Rehabilitation Inc941 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Rockville
Clinicians with the same Medicare primary specialty in Rockville, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1134394836 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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