Summary

Dr. Alexander Tosiou is a gastroenterologist who specializes in diagnosing and treating disorders of the digestive system. He earned his medical degree from Loyola University Stritch School of Medicine and completed his residency at McGaw Medical Center of Northwestern University in 1996. Dr. Tosiou furthered his training with a fellowship at Advocate Lutheran General Hospital in 1999, bringing over three decades of experience to his practice. He is fluent in both English and Spanish.

Dr. Tosiou practices at Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital and sees patients at locations in Lake Forest and Grayslake, Illinois. He focuses on treating conditions such as difficulty swallowing, acid reflux, and Barrett's esophagus. His expertise includes performing minimally invasive laparoscopic procedures and upper digestive tract endoscopies to diagnose and treat various gastrointestinal conditions. Patients have given him an average rating of 3.9 out of 5 on Vitals.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 3.9
  • 33 years of experience
  • 12 insurance plans accepted
  • speaks English, Spanish
  • Advocate Health Care (Advocate Lutheran General Hospital)
  • 7 written reviews
  • 2 specialties
  • 6 areas of expertise
  • 1 hospital affiliation
  • 2 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Alexander S. Tosiou has 2 locations

Northwestern Medical Group

800 N Westmoreland Rd Ste 100Lake Forest, IL 60045

Northwestern Medicine Gastroenterology Grayslake Outpatient Center

1475 E Belvidere Rd Ste 311Grayslake, IL 60030

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Alexander S. Tosiou, MDDr. Amit Kalra, MDDr. Kevin Liebovich, MDDr. Manoj K Mehta, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.9 
4.5 
4.1 
4.9 
33 Years of Experience 27 Years of Experience 35 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English, Spanish Speaks English Speaks English Speaks English
Lake Forest , ILHighland Park , ILGurnee , ILEvanston , IL
Med School: Loyola University Stritch School of Medicine Med School: University of Illinois Med School: Loyola University of Chicago, Stritch School of Medicine Med School: Rush Medical College Of Rush University Medical Center
Current Profile
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Insurance Plans Accepted by Alexander S. Tosiou

  • Aetna
  • Blue Cross Blue Shield of Illinois
  • Cigna
  • Health Alliance
  • Humana
  • Medicare
  • Medicare - Medicare
  • Meridian Health Plan - Medicaid (Managed)
  • Meritain Health
  • MetroPlus Health Plan - Medicaid (Managed)
  • Molina Healthcare - Medicaid (Managed)
  • UnitedHealthcare

Medical Specialties

Alexander S. Tosiou has the following 2 specialties

Specialty Expertise

Alexander S. Tosiou has the following 6 areas of expertise

  • Acid Reflux Disease (Gastroesophageal Reflux / GERD)
  • Constipation
  • Gastroenterologist
  • Hepatitis C
  • Irritable Bowel Syndrome (IBS)
  • Ulcerative Colitis

Certifications, License, & Education

33 Years Experience

Alexander S. Tosiou holds an expired medical license in the state of Illinois.

Medical License

Medical Doctor with an expired medical license in the state of Illinois that expired in 2026.

Education & Training

Fellowship

Completed their fellowship at Advocate Health Care (Advocate Lutheran General Hospital) in 1999.

Residency

Completed their residency at McGaw Medical Center of Northwestern University in 1996.

Medical School

Graduated from Loyola University Stritch School of Medicine in 1993.

NPI Number

Alexander S. Tosiou's NPI number is 1184602732.

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Frequently Asked Questions

Is Alexander Tosiou accepting new patients?
Alexander Tosiou is accepting new patients on Vitals. View Alexander Tosiou's profile on Vitals to make an appointment.
Does Alexander Tosiou accept my insurance?
You can see the insurance plans that Alexander Tosiou accepts on their Vitals profile.
How can I make an appointment with Alexander Tosiou?
You can find contact information for Alexander Tosiou here on Vitals.
Does Alexander Tosiou accept virtual/telehealth appointments?
Alexander Tosiou has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Which hospitals is Alexander Tosiou affiliated with?
Alexander Tosiou is affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital.

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