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

Dr. Mary Mahler, MD

Individual provider Medical Oncology Physician · NPI 1326703927

Dr. Mary Mahler, MD is a Medical Oncology Physician in Philadelphia, Pennsylvania. Practices as a sole proprietor. Licensed in Pennsylvania.

Licensed in
PA
In the registry since
2021
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

51 N 39th St
Philadelphia, PA 19104-2640
Phone: (215) 662-9801
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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 MD475737 (PA)

Record details

NPI number1326703927
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedNovember 8, 2021
Last updated in NPPESNovember 8, 2021
Certification dateNovember 8, 2021

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