Summary

Dr. Alexander Tosiou treats dysphagia, GERD, and Barrett's esophagus, and performs laparoscopy and upper GI endoscopy. He has practiced gastroenterology for 33 years and is affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. He speaks English and Spanish.

Dr. Tosiou earned his medical degree from Loyola University Stritch School of Medicine, completed his residency at McGaw Medical Center of Northwestern University in 1996, and his fellowship at Advocate Lutheran General Hospital in 1999. He sees patients in Lake Forest and Grayslake, Illinois. Patients on Vitals rate Dr. Tosiou 3.88 out of 5.

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, MD
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Alexander S. Tosiou, MDDr. Lawrence Gluskin, MDDr. Manoj K Mehta, MDDr. Kevin Liebovich, MD
GastroenterologyGastroenterologyGastroenterologyGastroenterology
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
3.9 
3.4 
4.9 
4.1 
33 Years of Experience 35 Years of Experience 27 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 , ILChicago , ILEvanston , ILGurnee , IL
Med School: Loyola University Stritch School of Medicine Med School: University of Illinois College of Medicine Med School: Rush Medical College Of Rush University Medical Center Med School: Loyola University of Chicago, Stritch School of Medicine
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

Which hospitals is Alexander Tosiou affiliated with?
Alexander Tosiou is affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital.
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.
Where is Alexander Tosiou's office located?
Alexander Tosiou's office is located at 800 N Westmoreland Rd Ste 100, Lake Forest, IL, 60045.
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.
Does Alexander Tosiou accept my insurance?
You can see the insurance plans that Alexander Tosiou accepts on their Vitals profile.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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