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

Individual provider Clinical Psychologist · NPI 1629698774

Mary Jean Shirk, PSYD is a Clinical Psychologist in Philadelphia, Pennsylvania. Qualified in 2021, 5 years ago. Practices with Delaware County Professional Services, Inc, a 275-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
5
Licensed in
PA
In the registry since
2020
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

3535 Market St Ste 1230
Philadelphia, PA 19104-6509
Phone: (610) 892-3800
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 255 S 17th St, Philadelphia, PA 19103-6231 — (610) 892-3800

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PS019648 (PA)

Record details

NPI number1629698774
Entity typeIndividual (Type 1)
GenderFemale
Credentials PSYD
Sole proprietorNo
NPI enumeratedApril 19, 2020
Last updated in NPPESMarch 21, 2025
Certification dateMarch 21, 2025

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Delaware County Professional Services, Inc — 275 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Colleagues at Delaware County Professional Services, Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 275 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia