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

Dr. John Michael Sullivan, MD

Individual provider Emergency Medicine Physician · NPI 1922685916

Dr. John Michael Sullivan, MD practises Emergency Medicine in Chicago, Illinois. Qualified in 2021, 5 years ago. Works from 3 locations. Licensed in Connecticut, Illinois and Massachusetts.

Years since qualifying
5
Licensed in
CT, IL, MA
In the registry since
2021
Specialties on file
4
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

251 E Huron St
Chicago, IL 60611-2908
Phone: (312) 926-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2800 Main St, Bridgeport, CT 06606-4292 — (475) 210-5604
  • 80 Seymour St, Hartford, CT 06102-8000 — (860) 972-0001

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 81236 (CT)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 1922685916 (IL)
Emergency Medicine Physician Taxonomy 207P00000X · Licence 1025775 (MA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1922685916
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 25, 2021
Last updated in NPPESMarch 24, 2026
Certification dateMarch 24, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Accepts Medicare assignment Not indicated

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 patients94
Services billed 146 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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

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