Quick answers
- Which hospitals does Peter H. Ahn work at?
- Medicare's official clinician data lists Peter H. Ahn at 2 hospitals: MedStar Georgetown University Hospital and MedStar Washington Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter H. Ahn see patients?
- Medicare's clinician data lists 1 practice location in Washington, DC. Call before your visit to confirm the address.
- What is Peter H. Ahn's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Peter H. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Peter H. Ahn 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 Peter H. Ahn?
- (202) 444-2000, as listed in official Medicare / NPI Registry data.
- What is Peter H. Ahn's NPI number?
- 1710117106. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter H. Ahn works
Medicare's Facility Affiliation Data lists Peter H. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · CCN 090004
- MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · CCN 090011
Practice locations
Addresses where Peter H. Ahn is enrolled with Medicare (CMS data updated 2026-10-02).
- 3800 Reservoir Rd NWWashington, DC 20007 (202) 444‑2000
Group practices
Medicare enrollment lists Peter H. Ahn as a member of this group (CMS data updated 2026-10-02).
- MedStar Medical Group II LLC3,767 clinicians in the group
Specialties
- Radiation Oncologyprimary
Find other Radiation Oncology doctors in District of Columbia →
Other radiation oncologists in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1710117106 |
| 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