Dr. Peter H. Ahn, M.D.
Radiation Oncology (Radiation Oncology Physician)
- Medicare participating
At a glance
- Medical school
- Albert Einstein College of Medicine of Yeshiva University (2003)
- Years since graduation
- 23
- In the NPI registry since
- 2009
- Medicare patients seen, 2024
- 164
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2003Medical school: Albert Einstein College of Medicine of Yeshiva University
- 2009Registered with an NPI (national billing number; not a license date)
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Radiation Oncology Physician primary
PA license MD437882
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Medstar Washington Hospital Center Washington, DC
- Medstar Georgetown University Hospital Washington, DC
Medical groups
- Medstar Medical Group II LLC (3,767 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 164
- Services billed
- 1,911
- Patients’ average age
- 74
| Service | Times | Patients |
|---|---|---|
| Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 658 | 31 |
| Ct guidance for insertion of radiation therapy fields | 242 | 12 |
| Intensity modulated treatment delivery, single or multiple fields/arcs,via narrow spatially and temporally modulated beams, binary, dynamic mlc, per treatment session | 231 | 11 |
| Radiation treatment management, 5 treatment sessions | 174 | 38 |
| Calculation of radiation therapy dose | 155 | 27 |
| Diagnostic exam of voice box using a flexible endoscope | 110 | 76 |
| Established patient office or other outpatient visit, 40-54 minutes | 98 | 78 |
| Established patient office or other outpatient visit, 30-39 minutes | 77 | 63 |
| Continuing radiation therapy consultation per week | 50 | 12 |
| Complex radiation therapy planning | 46 | 45 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Oxycodone Hcl Other prescribers in Philadelphia, PA | 44 |
| Lidocaine Hcl Viscous (lidocaine hcl) Other prescribers in Philadelphia, PA | 23 |
| Nystatin Other prescribers in Philadelphia, PA | 12 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 3 companies reported 3 payments worth $72.97 in total to this clinician.
| Novartis Pharmaceuticals Corporation | $28.50 |
|---|---|
| Bioprotect Medical, Inc. | $25.53 |
| Merck Sharp & Dohme LLC | $18.94 |
| Food and Beverage | $72.97 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.