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

Gillian Grannum, PHD

Individual provider Psychologist · NPI 1407292162

Gillian Grannum, PHD is a Clinical Psychologist in Ephrata, Pennsylvania. Qualified in 2017, 9 years ago. Practices with Philhaven, a 91-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Pennsylvania.

Years since qualifying
9
Licensed in
PA
In the registry since
2013
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Practice location Address checks out

344 N Reading Rd
Ephrata, PA 17522-1651
Phone: (717) 738-1125
Fax: (717) 738-0606
Show map & directions

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

Additional practice locations (1)

  • 169 Martin Ave, Ephrata, PA 17522-1724 — (717) 733-0311

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PS018690 (PA)
Psychologist Taxonomy 103T00000X · Licence PS018690 (PA)

Record details

NPI number1407292162
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorNo
NPI enumeratedMay 21, 2013
Last updated in NPPESSeptember 16, 2024
Certification dateSeptember 16, 2024
Mailing address601 Memory Ln, York, PA 17402-2231

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2017 (9 years in practice)
Group practice Philhaven — 91 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Ephrata