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

Dr. William John Bull Jr., MD

Individual provider Specialist · NPI 1417956947

Dr. William John Bull Jr., MD is a Specialist in Naperville, Illinois. Licensed in Illinois. Registered with an NPI since 2005.

Licensed in
IL
In the registry since
2005
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

1307 Macom Dr
Naperville, IL 60564-3202
Phone: (630) 717-6000
Fax: (630) 717-6777
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence 036102621 (IL)

Record details

NPI number1417956947
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 18, 2005
Last updated in NPPESSeptember 28, 2010

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