Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Thomas Ryan Alcorn, MD

Individual provider Emergency Medicine Physician · NPI 1336467968

Thomas Ryan Alcorn, MD is an Emergency Medicine Physician in Chicago, Illinois. Licensed in Illinois. Registered with an NPI since 2010.

Licensed in
IL
In the registry since
2010
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

1620 W Harrison St Dept OF Emergency Medicine
Chicago, IL 60612-3801 Not confirmed with CMS for 10 years — call before visiting
Phone: (312) 947-0100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 036136815 (IL)

Record details

NPI number1336467968
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 6, 2010
Last updated in NPPESMarch 31, 2016

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 patients135
Services billed 276 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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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