Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gregory Alan Seidel, PHD

Individual provider Clinical Neuropsychologist · NPI 1447602982

Gregory Alan Seidel, PHD is a Clinical Psychologist in Philadelphia, Pennsylvania. Qualified in 2014, 12 years ago. Practices with Jefferson University Physicians, a 1,554-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
12
Licensed in
PA
In the registry since
2016
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

909 Walnut St Fl 2
Philadelphia, PA 19107-5211
Phone: (215) 955-7952
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1098 W Baltimore Pike, Media, PA 19063-5139 — (610) 744-2960

Specialties & licences

Clinical Neuropsychologist (primary) Taxonomy 103G00000X · Licence PS018084 (PA)

Record details

NPI number1447602982
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorNo
NPI enumeratedJuly 8, 2016
Last updated in NPPESOctober 14, 2021
Certification dateOctober 14, 2021

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2014 (12 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 patients41
Services billed 513 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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