Quick answers
- Does Alexandra L. Olsen accept Medicare assignment?
- Yes. Medicare's clinician data says Alexandra L. Olsen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Alexandra L. Olsen's NPI number?
- 1538935903. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexandra L. Olsen works
Medicare's Facility Affiliation Data lists Alexandra L. Olsen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004
- Virginia Hospital CenterArlington, VA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 490050
Practice locations
Addresses where Alexandra L. Olsen is enrolled with Medicare (CMS data updated October 2, 2026).
- 1145 19th St NW, 311 Mmg at 19th Street NWWashington, DC 20036 (202) 429‑2401
- 1625 N George Mason DrArlington, VA 22205 (703) 521‑6662
- 3800 Reservoir Rd NWWashington, DC 20007
- 9470 Annapolis Rd, Suite 309Lanham, MD 20706 (202) 832‑1800
- 950 N Glebe Rd, Suite 700Arlington, VA 22203
Group practices
Medicare enrollment lists Alexandra L. Olsen as a member of these groups (CMS data updated October 2, 2026).
- MedStar Medical Group II LLC3,767 clinicians in the group
- Privia Medical Group, LLC1,533 clinicians in the group
Specialties
- Nurse Practitionerprimary
Find other clinicians: Nurse Practitioner, District of Columbia →
Other nurse practitioners in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Other clinicians in MedStar Medical Group II LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538935903 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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