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

Stephen Diefenderfer

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1497488704

Stephen Diefenderfer is a Physician Assistant in Boston, Massachusetts. Qualified in 2024, 2 years ago. Practices with Massachusetts General Physicians Organization Inc, a 3,484-clinician group, works from 2 locations and accepts Medicare assignment.

Years since qualifying
2
In the registry since
2022
Specialties on file
2
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Practice location Address checks out

55 Fruit St
Boston, MA 02114-2621
Phone: (617) 726-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 588 Longmeadow St, Longmeadow, MA 01106-2212 — (413) 565-1000

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1497488704
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJuly 5, 2022
Last updated in NPPESJuly 9, 2024
Certification dateJuly 9, 2024

Medicare enrollment

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

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2024 (2 years in practice)
Group practice Massachusetts General Physicians Organization Inc — 3484 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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