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

Dr. Mark L. Sobczak, MD

Individual provider Radiation Oncology Physician · NPI 1164422523

Dr. Mark L. Sobczak, MD is a Radiation Oncology Physician in Philadelphia, Pennsylvania. Works from 2 locations. Licensed in Delaware, Kentucky, Maryland and Pennsylvania and 1 more.

Licensed in
DE, KY, MD, PA, VA
In the registry since
2005
Specialties on file
5
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

333 Cottman Ave
Philadelphia, PA 19111
Phone: (215) 728-2581
Fax: (215) 214-4038
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 211 S Gulph Rd Ste 200, King Of Prussia, PA 19406-3101 — (610) 382-5900

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence MD-045641-L (PA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence D0060531 (MD)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 0101046483 (VA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence C1-0007087 (DE)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 36651 (KY)

Record details

NPI number1164422523
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 28, 2005
Last updated in NPPESJune 6, 2018

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