Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Seyfettin Onder Alpdogan, MD

Individual provider Medical Oncology Physician · NPI 1558538991

Seyfettin Onder Alpdogan, MD practises Medical Oncology in Philadelphia, Pennsylvania. Qualified in 1983, 43 years ago. Practices with Jefferson University Physicians, a 1,554-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
43
Licensed in
PA
In the registry since
2008
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

925 Chestnut St Ste 320A
Philadelphia, PA 19107-4216 Not confirmed with CMS for 14 years — call before visiting
Phone: (215) 955-8874
Fax: (215) 955-2340
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence MD437524 (PA)

Record details

NPI number1558538991
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 14, 2008
Last updated in NPPESMarch 6, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice Jefferson University Physicians — 1554 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients117
Services billed 434 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Jefferson University Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1554 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia