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

Individual provider Gastroenterology Physician · NPI 1033204706

William Simon Markey, MD is a Gastroenterology Physician in Chicago, Illinois. Practices as a sole proprietor. Licensed in Illinois.

Licensed in
IL
In the registry since
2006
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

3000 N Halsted St Ste 506
Chicago, IL 60657-5194
Phone: (312) 944-1247
Fax: (312) 944-2188
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Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 36046023 (IL)

Record details

NPI number1033204706
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 4, 2006
Last updated in NPPESMay 18, 2009
Mailing addressPo Box 146530, Chicago, IL 60614

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