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

William D Clapp, MD

Individual provider Internal Medicine Physician · NPI 1174721229

William D Clapp, MD is an Internal Medicine Physician in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2007.

Licensed in
IL
In the registry since
2007
Specialties on file
3
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

2160 W Ogden Ave
Chicago, IL 60612-4219
Phone: (312) 746-6003
Fax: (312) 746-5134
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 036091299 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-091299 (IL)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 036-091299 (IL)

Record details

NPI number1174721229
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 10, 2007
Last updated in NPPESApril 22, 2021
Certification dateApril 22, 2021

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