W. JOHN SIAR MD
NPI 1639174055
Pediatrics - Neonatal-Perinatal Medicine in Du Bois, PA

Q: What is W. Siar's NPI number?

The NPI number for W. Siar is 1639174055. It was assigned to this individual provider in the NPPES registry on June 14, 2005.

Q: What is W. Siar's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Q: When was this NPI record last updated?

The NPPES record for W. Siar was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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 June 14, 2005

635C MAPLE AVE, DU BOIS, PA 15801(814) 371-1771 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About W. John Siar Md NPPES

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

W. JOHN SIAR MD (NPI 1639174055) is an individual neonatal-perinatal medicine provider in Du Bois, Pennsylvania, licensed in Pennsylvania (MD029080L) and active in the NPI registry since June 2005.

NPPES Registry Identity

NPI1639174055

Entity TypeIndividualMale

Primary Taxonomy2080N0001X

Provider Legal NameW. JOHN SIARCredential: MD

Location Address635C MAPLE AVEDu Bois, PA 15801-2377

Mailing Address635c Maple AveDu Bois, PA 15801-2377 · (814) 371-1771

Phone(814) 371-1771

Sole ProprietorNo

Enumeration DateJune 14, 2005

Last NPPES UpdateSeptember 11, 2025

✔ NPI 1639174055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2080N0001X

License✔ Licensed in PA · MD029080L

Definition

A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.

Also ListedPediatricsTaxonomy 208000000X · License MD029080L (PA)

635C MAPLE AVE, Du Bois, PA 15801

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Other Identifiers 1

Medicaid0006795310008PA

Other Providers at the Same Location NPPES 2

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

GATEWAY AREA MEDICAL PCP

Pediatrics

635C MAPLE AVE
DU BOIS, PA 15801

Clearfield County (814) 371-1771

GATEWAY AREA MEDICAL SPEC

Pediatrics (Neonatal-Perinatal Medicine)

635C MAPLE AVE
DU BOIS, PA 15801

Clearfield County (814) 371-1771

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 W. Siar's NPI number?

The NPI number for W. Siar is 1639174055. It was assigned to this individual provider in the NPPES registry on June 14, 2005.

Where is W. Siar located?

W. Siar practices at 635C Maple Ave, Du Bois, PA 15801. The listed phone number is (814) 371-1771.

What is W. Siar's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

When was this NPI record last updated?

The NPPES record for W. Siar was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 months 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.