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

WILLIAM J DENNIS MD
NPI 1356392211
Pediatrics in Phila, PA

Q: What is William Dennis's NPI number?

The NPI number for William Dennis is 1356392211. It was assigned to this individual provider in the NPPES registry on May 15, 2006.

Q: What is William Dennis's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Dennis 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 29 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 May 15, 2006

3823 J ST, PHILA, PA 19124(215) 288-0157(215) 288-4764 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About William J Dennis Md NPPES

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

WILLIAM J DENNIS MD (NPI 1356392211) is an individual pediatrics provider in Phila, Pennsylvania, licensed in Pennsylvania (MD011421E) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1356392211

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameWILLIAM J DENNISCredential: MD

Location Address3823 J STPhila, PA 19124-5405

Mailing Address3823 J StPhila, PA 19124-5405 · (215) 288-0157 · Fax (215) 288-4764

Phone(215) 288-0157

Fax(215) 288-4764

Sole ProprietorNo

Enumeration DateMay 15, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1356392211 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in PA · MD011421E

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

3823 J ST, Phila, PA 19124

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Other Identifiers 6

Other16766Bcbs

Other6130173ACigna

Medicaid00652930PA

Other1025945Keystone Mercy

Other0055536001Keystone Health Plan East

Other118185Aetna

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WM. J. DENNIS MD

Specialist

3823 J ST
PHILA, PA 19124

Philadelphia County (215) 288-0157

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 William Dennis's NPI number?

The NPI number for William Dennis is 1356392211. It was assigned to this individual provider in the NPPES registry on May 15, 2006.

Where is William Dennis located?

William Dennis practices at 3823 J St, Phila, PA 19124. The listed phone number is (215) 288-0157.

What is William Dennis's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

When was this NPI record last updated?

The NPPES record for William Dennis 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 29 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.