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

Sean Thomas Williams, MD

Individual provider Emergency Medicine Physician · NPI 1255712626

Sean Thomas Williams, MD is an Emergency Medicine Physician in Chicago, Illinois. Works from 3 locations. Licensed in Illinois.

Licensed in
IL
In the registry since
2015
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

5645 W Addison St Dept OF Emergency Medicine
Chicago, IL 60634-4403
Phone: (773) 794-8383
Fax: (773) 794-4686
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 7435 W Talcott Ave, Chicago, IL 60631-3707 — (773) 774-8000
  • 7435 W Talcott Ave, Chicago, IL 60631-3707 — (773) 774-8000

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036144052 (IL)

Record details

NPI number1255712626
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 11, 2015
Last updated in NPPESMarch 18, 2021
Certification dateMarch 18, 2021

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients39
Services billed 65 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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