Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

W. John Siar, MD

Individual provider Pediatrics Physician · NPI 1639174055

W. John Siar, MD is a Pediatrics Physician in Du Bois, Pennsylvania. Licensed in Pennsylvania. Registered with an NPI since 2005.

Licensed in
PA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

635C Maple Ave
Du Bois, PA 15801-2377
Phone: (814) 371-1771
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neonatal-Perinatal Medicine Physician (primary) Taxonomy 2080N0001X · Licence MD029080L (PA)
Pediatrics Physician Taxonomy 208000000X · Licence MD029080L (PA)

Record details

NPI number1639174055
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 14, 2005
Last updated in NPPESSeptember 11, 2025
Mailing address635c Maple Ave, Du Bois, PA 15801-2377

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