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

John F. Sullivan, DO

Individual provider Emergency Medicine Physician · NPI 1780717108

John F. Sullivan, DO practises Emergency Medicine in Hoffman Estates, Illinois. Graduated from Chicago College of Osteopathy in 1988, 38 years ago. Practices with Cepamerica Illinois LLP, a 493-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
38
Trained at
Chicago College of Osteopathy
Licensed in
IL
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1555 Barrington Rd
Hoffman Estates, IL 60194-1019 Not confirmed with CMS for 19 years — call before visiting
Phone: (847) 843-2000
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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 (IL)

Record details

NPI number1780717108
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 14, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolCHICAGO COLLEGE OF OSTEOPATHY
Graduated 1988 (38 years in practice)
Group practice Cepamerica Illinois Llp — 493 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients341
Services billed 474 a service is one billed item, such as a visit, a test or a procedure
Average patient age79

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.

Colleagues at Cepamerica Illinois LLP

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 493 clinicians in the practice; 12 are shown here.

Other providers in Hoffman Estates