> > > > Dr. John Siegfried, MD
Dr. John David Siegfried MD is a male Allergist & Immunologist, has 35 years of experience and practices in Internal Medicine, Gastroenterology, Allergy & Immunology, and Pediatrics.
Video profile
Dr. John Siegfried has 4 office locations.
Rush Copley Medical Center
1221 N Highland Ave
Aurora, IL 60506

Phone Number
Locations and availability (4)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

  • Currently 4 of 4 stars
Patient comments (1)

The overall average patient rating of Dr. John Siegfried is Excellent. Dr. Siegfried has been reviewed by 2 patients who have provided 1 comments. The rating is 4 out of 4 stars.

Patient Ratings
Ease of Appointment 2.5
  • Currently 2.5 of 4 stars
Promptness 3.0
  • Currently 3 of 4 stars
Courteous Staff 4.0
  • Currently 4 of 4 stars
Accurate Diagnosis 4.0
  • Currently 4 of 4 stars
Bedside Manner 4.0
  • Currently 4 of 4 stars
Spends Time with Me 4.0
  • Currently 4 of 4 stars
Follows Up After Visit 4.0
  • Currently 4 of 4 stars

Specialties & Research

Dr. John Siegfried, MD is board certified in Internal Medicine and Gastroenterology.

  • He has special expertise in 3 areas:
  • Asthma
  • Crohn`s disease Hemorrhoid treatment Ulcers-general Age 16 Hiatal hernia Hepatitis Abdominalcolorectal cancer
  • Nasal Allergy (Rhinitis)

Education & Awards

Dr. Siegfried graduated from University of Illinois at Chicago.


Dr. Siegfried has 12 hospital affiliations:

  • Provena Mercy Medical Center 
  • Rush Copley Medical Center 

Accepted Insurance Plans

Dr. Siegfried accepts these health insurances in at least one office:

  • United Healthcare - 2 plans
  • Unicare - 2 plans
  • Cigna - 6 plans
  • Humana - 2 plans


  • French

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Additional Information
Where does Dr. John D. Siegfried practice?
Dr. John Siegfried practices Internal Medicine, Gastroenterology, Allergy & Immunology, and Pediatrics near Aurora, IL.
Additional practice locations include: Champaign, IL.
See Aurora Internists, Aurora Gastroenterologists, Aurora Allergists, and Aurora Pediatricians.