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

Nadeem Siddiqui, MD

Individual provider Gastroenterology Physician · NPI 1770577785

Nadeem Siddiqui, MD is a Gastroenterology in McHenry, Illinois. Qualified in 1990, 36 years ago. Practices with Agnesian Healthcare Inc, a 390-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
36
Licensed in
IL, WI
In the registry since
2005
Specialties on file
2
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

4309 W Medical Center Dr Ste B202
McHenry, IL 60050-8417
Phone: (847) 535-6083
Fax: (815) 455-2789
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 2700 E Enterprise Ave, Appleton, WI 54913 — (920) 738-7300
  • 855 N Westhaven Dr, Oshkosh, WI 54904-7668 — (920) 303-8700

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 036175750 (IL)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 35007 (WI)

Record details

NPI number1770577785
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 6, 2005
Last updated in NPPESJune 24, 2026
Certification dateJune 24, 2026
Mailing addressPo Box 735044, Chicago, IL 60673-5044

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolOTHER
Graduated 1990 (36 years in practice)
Group practice Agnesian Healthcare Inc — 390 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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