Registry data as of Aug 27, 2026

William Flack, PHD

Clinical Psychologist · Lewisburg, PA

William Flack, PHD is a clinical psychologist with a practice address in Lewisburg, Pennsylvania, and NPI 1922597897, issued on May 7, 2018. Check the license with the Pennsylvania board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, loaded Aug 27, 2026 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1922597897
Name
William Flack
Credential
PHD
Primary taxonomy
Clinical Psychologist 103TC0700X
License number
7070-PY-PR MA
Self-reported in NPPES; status is on the state search
Practice location
1 Dent Dr, Lewisburg, PA 17837
Phone
(570) 577-1131
Enumerated
May 7, 2018
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 1 Dent Dr

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

  1. Lee BardMental Health Counselor1942939228
  2. Victoria BydeleyAthletic Trainer1629564174
  3. Joshua Engelbrecht, MS, ATCAthletic Trainer1154846913
  4. Kaitlyn HagerAthletic Trainer1447676085
  5. Chelsea Hough, MS, RDN, LDNRegistered Dietitian1639007305
  6. Kristin Klinger, ATCAthletic Trainer1831740927

Verify William Flack in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Pennsylvania board licenses this professionCheck 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.

Clinical Psychologist providers in Pennsylvania

There are 2,359 clinical psychologist records in Pennsylvania. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 2,359 in Pennsylvania → Every provider in Lewisburg →

Other clinical psychologist records in Pennsylvania

  1. Sabra Abboud, PSY.D.York, PA1144406695
  2. Nour Abdelghani, PSYDPittsburgh, PA1336510452
  3. David Abelsohn, PHDPlymouth Meeting, PA1467660589
  4. Darren Aboyoun, PHDEaston, PA1497718779
  5. Allison Abraham, PSY.D.Southampton, PA1164016929
  6. Allison Abrahamson, PSYDKing Of Prussia, PA1083100952
  7. Scott Abrams, PHDNew Hope, PA1801077011
  8. Iris Abreu, PH.D.Philadelphia, PA1760711147
  9. Erin Abrigo, PH.D.Philadelphia, PA1710380290
  10. Glenn Acker, M.S.Mount Gretna, PA1942451471

Common questions

What is William Flack, PHD's NPI number?

William Flack, PHD's National Provider Identifier (NPI) is 1922597897, issued on May 7, 2018. An NPI identifies a provider in billing; it is not a license.

Where is William Flack, PHD located?

The NPPES record lists a practice address at 1 Dent Dr, Lewisburg, PA, 17837. Phone: (570) 577-1131. Providers update this record themselves, so call before visiting.

How can I verify William Flack, PHD's license?

Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.