Quick answers
- Which hospitals does Alexander Nissen work at?
- Medicare's official clinician data lists Alexander Nissen at 1 hospital: MedStar Washington Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Alexander Nissen see patients?
- Medicare's clinician data lists 2 practice locations, including Washington, DC. Call before your visit to confirm the address.
- What is Alexander Nissen's specialty?
- Medicare lists Cardiac Surgery as the primary specialty.
- Does Alexander Nissen accept Medicare assignment?
- Yes. Medicare's clinician data says Alexander Nissen 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 Alexander Nissen offer telehealth?
- Medicare's clinician data says Alexander Nissen offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Alexander Nissen?
- (202) 877-2200, as listed in official Medicare / NPI Registry data.
- What is Alexander Nissen's NPI number?
- 1730540386. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Alexander Nissen works
Medicare's Facility Affiliation Data lists Alexander Nissen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · CCN 090011
Practice locations
Addresses where Alexander Nissen is enrolled with Medicare (CMS data updated 2026-10-02).
- 106 Irving St NW 4200, Mmg at WhcWashington, DC 20010 (202) 877‑2200
- 110 Irving St NWWashington, DC 20010 (202) 877‑2851
Group practices
Medicare enrollment lists Alexander Nissen as a member of these groups (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
- MedStar Heart Institute LLC301 clinicians in the group
Specialties
- Cardiac Surgeryprimary
Find other Cardiac Surgery doctors in District of Columbia →
Other cardiac surgeons in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1730540386 |
| 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