NPPES file of Aug 9, 2026

Gillian Grannum, PHD

Clinical Psychologist · Ephrata, PA

Gillian Grannum, PHD is a clinical psychologist with a practice address in Ephrata, Pennsylvania, and NPI 1407292162, issued on May 21, 2013. Check the license (Pennsylvania PS018690, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1407292162
Name
Gillian Grannum
Credential
PHD
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
PS018690 PA
Self-reported in NPPES; status is on the state search
Practice location
344 N Reading RD, Ephrata, PA 17522
Phone
(717) 738-1125
Enumerated
May 21, 2013
Record last updated
Sep 16, 2024
Fax
(717) 738-0606
Medicaid ID
103573403 PA
Medicare enrollment
Enrolled (PECOS I20181218001127); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest clinical psychologist records → All 2,597 in Pennsylvania → Look up another NPI →

Also registered at 344 N Reading RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mercedes Agudo, MD, LFAPA, DFAACAPPsychiatry Physician1659301638
  2. Gwendolyn Blankenship, LCSWClinical Social Worker1902245905
  3. Andrew BowenClinical Psychologist1053121004
  4. John Dolena, D.O.Child & Adolescent Psychiatry Physician1619195070
  5. Lydia Hackenberg, PSYDPsychologist1538513528
  6. Christopher Harrison, MA, LPCProfessional Counselor1689966566

Verify Gillian Grannum in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
    Search for license PS018690    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Pennsylvania license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. PhilhavenLancaster, PA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Gillian Grannum among 2,597 clinical psychologist records in Pennsylvania

Gillian Grannum, PHD is one of 2,597 clinical psychologist records with a practice address in Pennsylvania. 15% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 63% of them.

  • NPI issued2013 · 63% of these records are older, 34% newer
  • In a Medicare fileYes · 15% of these records are
  • In the CMS Doctors and Clinicians fileYes · 27% of these records are
  • Graduated2017 · median 2003 among the 707 with a school on file
  • Record last updated2024 · 65% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Clinical Psychologist providers in Pennsylvania

There are 2,597 clinical psychologist records in Pennsylvania.

All 2,597 in Pennsylvania → Every provider in Ephrata → Clinical Psychologist nationwide →

The 8 clinical psychologist records with the nearest ZIP codes

  1. Andrew BowenEphrata, PA 175221053121004
  2. Timothy Calvin, PSYD, CAADCEphrata, PA 175221215261961
  3. Scott Heller, PSYDEphrata, PA 175221750582243
  4. Aimee Todd, PSYDEphrata, PA 175221740296854
  5. Karin Bleecker, MSE Petersburg, PA 175201053312264
  6. Kevin Kelly, PSY.D.East Petersburg, PA 175201619984309
  7. Robert Tindall, PH.D.Gap, PA 175271316098825
  8. Mary Murray, PH.D.Leola, PA 175401831220086

Common questions

What is Gillian Grannum, PHD's NPI number?

Gillian Grannum, PHD's National Provider Identifier (NPI) is 1407292162, issued on May 21, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Gillian Grannum, PHD located?

The NPPES record lists a practice address at 344 N Reading RD, Ephrata, PA, 17522. Phone: (717) 738-1125. Providers update this record themselves, so call before visiting.

How can I verify Gillian Grannum, PHD's license?

NPPES lists Pennsylvania license number PS018690, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.