Skip to content
  • Home
  • Appointments
  • MyNM Patient Portal
  • Careers
  • Pay a Bill
  • Financial Assistance
  • For Physicians
  • Feinberg School of Medicine
  • Newsroom
  • Contact Us
Northwestern Medicine
Northwestern Medicine
menu
Search
Clear field
  •  Find Doctors
  • location_on Locations Near You
  • Doctors
  • Locations
  • Conditions and Services
  • Patients and Visitors
  • HealthBeat
  • Clinical Research

COVID-19, Flu and RSV Information and COVID-19 Vaccine Availability

Learn more about respiratory viruses and vaccination for COVID-19, flu and RSV.

  1. Home
  2. Conditions and Services
  3. Endocrinology and Metabolism
  4. Meet the Western Suburbs Endocrinology and Diabetes Team

Meet the Western Suburbs Endocrinology and Diabetes Team

The Northwestern Medicine Endocrinology and Diabetes team provides comprehensive diagnosis and treatment of diseases of the pituitary, thyroid, parathyroid, and adrenal glands.

William C. Bayer, MD

William C. Bayer, MD

Rated 4.9
star star star star star
1035 Ratings
Primary Specialty: Endocrinology
View Profile
Steven J. Bielski, MD

Steven J. Bielski, MD

Rated 4.9
star star star star star
1374 Ratings
Primary Specialty: Endocrinology
View Profile Meet the Doctor
Andrea Estefania Cedeno, MD

Andrea Estefania Cedeno, MD

Rated 4.5
star star star star star_half
238 Ratings
Primary Specialty: Endocrinology
View Profile
Tiffany A. Karas, MD

Tiffany A. Karas, MD

Rated 5.0
star star star star star
1088 Ratings
Primary Specialty: Endocrinology
View Profile
Demetra V. Rupp, MD

Demetra V. Rupp, MD

Rated 4.9
star star star star star
606 Ratings
Primary Specialty: Endocrinology
View Profile
Adam D. Stein, MD

Adam D. Stein, MD

Rated 5.0
star star star star star
1063 Ratings
Primary Specialty: Endocrinology
View Profile
Aileen Westrick, MD

Aileen Westrick, MD

Rated 4.9
star star star star star
973 Ratings
Primary Specialty: Endocrinology
View Profile
Tijana Bryan, PA-C

Tijana Bryan, PA-C

Primary Specialty: Endocrinology
View Profile
Rebecca D. Guio, APRN

Rebecca D. Guio, APRN

Rated 4.9
star star star star star
715 Ratings
Primary Specialty: Endocrinology
View Profile
e-newsletter sign-up

Quick Links

  • Careers
  • Classes, Events and Support Groups
  • Immediate Care and Check-in
  • Medical Records
  • NM Store
  • Symptom Checker
Give Now Volunteer Your Time

About Us

  • History
  • Leadership
  • Our Hospitals
  • Awards and Accreditations
  • Financial Statements and Annual Reports
  • NM Community Impact
  • Diversity and Inclusion
  • Workforce Development
  • Quality
  • See all About Us

Billing and Insurance

  • Billing Questions
  • Financial Assistance
  • Pay a Bill
  • Insurance Information
  • Chargemaster
  • See all Billing and Insurance

For Medical Professionals

  • For Physicians
  • For Nurses
  • For Students
  • For Qualifying Organizations
  • Employee and Physician Login
  • See all For Medical Professionals

Feinberg School of Medicine

  • Student Admissions
  • Education
  • Research
  • Clinical Trials
  • Departments
  • Institutes and Centers
  • See all Feinberg School of Medicine
Give Now Volunteer Your Time
Northwestern Medicine Logo

Call us  

1-844-NMBETTER
Additional Footer Links
Northwestern Medicine Logo
Primary Social Navigation
  • Facebook
  • Twitter
  • Instagram
  • TikTok
  • LinkedIn
  • Pinterest
  • YouTube
Secondary Social Navigation
  • video_library Video Library
  • chat_bubble_outline Blog
Footer Navigation
  • Patient Rights and Policies
  • Accessibility

© 2023 by Northwestern Medicine® and Northwestern Memorial HealthCare.
Northwestern Medicine® is a trademark of Northwestern Memorial HealthCare, used by Northwestern University.

You are using an unsupported browser

Please consider using one of these supported browsers

Chrome Edge Safari Firefox
  • Home
  • Doctors
  • Locations
  • Conditions and Services
  • Patients and Visitors
  • HealthBeat
  • Clinical Research
  • Appointments
  • MyNM Patient Portal
  • Careers
  • Pay a Bill
  • Financial Assistance
  • For Physicians
  • Feinberg School of Medicine
  • Newsroom
  • Contact Us