Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. JOHN ANTHONY WILLIAMSON PHARMD
NPI 1982687141
Pharmacist - Pharmacotherapy in Wallingford, PA

Q: What is John Williamson's NPI number?

The NPI number for John Williamson is 1982687141. It was assigned to this individual provider in the NPPES registry on November 22, 2005.

Q: What is John Williamson's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Pharmacotherapy, with taxonomy code 1835P1200X.

Q: When was this NPI record last updated?

The NPPES record for John Williamson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 22, 2005

415 GOLFVIEW RD, WALLINGFORD, PA 19086(610) 892-2928(610) 892-7920 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

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About Dr. John Anthony Williamson Pharmd NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JOHN ANTHONY WILLIAMSON PHARMD (NPI 1982687141) is an individual pharmacotherapy provider in Wallingford, Pennsylvania, licensed in Pennsylvania (RP042197L) and active in the NPI registry since November 2005.

NPPES Registry Identity

NPI1982687141

Entity TypeIndividualMale

Primary Taxonomy1835P1200X

Provider Legal NameDR. JOHN ANTHONY WILLIAMSONCredential: PHARMD

Location Address415 GOLFVIEW RDWallingford, PA 19086-6408

Mailing Address415 Golfview RdWallingford, PA 19086-6408 · (610) 892-2928 · Fax (610) 892-7920

Phone(610) 892-2928

Fax(610) 892-7920

Sole ProprietorNo

Enumeration DateNovember 22, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1982687141 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPharmacist · PharmacotherapyPharmacy Service Providers

Taxonomy Code1835P1200X

License✔ Licensed in PA · RP042197L

Definition

A licensed pharmacist who has demonstrated specialized knowledge and skill in optimizing pharmacotherapeutic care of patients, by developing, implementing, monitoring, and modifying complex treatment plans, providing advanced level education and consultation, and collaborating with other health professionals in the management of therapy.

415 GOLFVIEW RD, Wallingford, PA 19086

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John Williamson's NPI number?

The NPI number for John Williamson is 1982687141. It was assigned to this individual provider in the NPPES registry on November 22, 2005.

Where is John Williamson located?

John Williamson practices at 415 Golfview Rd, Wallingford, PA 19086. The listed phone number is (610) 892-2928.

What is John Williamson's specialty?

The primary specialty registered for this NPI is Pharmacist, specializing in Pharmacotherapy, with taxonomy code 1835P1200X.

When was this NPI record last updated?

The NPPES record for John Williamson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 44 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.