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

Dr. John Sultan

Individual provider Internal Medicine Physician · NPI 1447228242

Dr. John Sultan practises Internal Medicine in Highland Park, Illinois. Graduated from University of Chicago, Pritzker School of Medicine in 1981, 45 years ago. Practices with Endeavor Health Medical Group, a 3,348-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
45
Trained at
University of Chicago, Pritzker School of Medicine
Licensed in
IL
In the registry since
2006
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Practice location Address checks out

1777 Green Bay Rd Ste 201
Highland Park, IL 60035-3297
Phone: (847) 433-3460
Fax: (847) 433-4062
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036065330 (IL)

Record details

NPI number1447228242
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 9, 2006
Last updated in NPPESJune 18, 2026
Certification dateJune 18, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF CHICAGO, PRITZKER SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice Endeavor Health Medical Group — 3348 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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 patients708
Services billed 3,519 a service is one billed item, such as a visit, a test or a procedure
Average patient age81

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. Those with a page here are linked.

Colleagues at Endeavor Health Medical Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3348 clinicians in the practice; 12 are shown here.

Other providers in Highland Park