Jacek Zajac, MD

Specialties: Endocrinology, Diabetes and Metabolism

Practice: Endocrinology Associates, SC

Hospital Affiliations: Elmhurst Hospital

Clinical Interests: Pituitary, Brain Tumors; Diabetes; Menstrual Problems; Thyroid Disease; Obesity; Adrenal Diseases

Philosophy Of Care

I will strive to provide the most complete care possible in a humane and considerate fashion.


2500 S. Highland Ave
Ste 104
Lombard, IL 60148
Phone: 630 629-3610
Fax: 630-629-4878

Education & Credentials

Medical School: Jagiellonian University, Krakow, Poland

Internship: Not Available

Residency: Maimonides Medical Center

Fellowship: Beth Israel Medical Center, NY

Society: American Association of Clinical Endocrinology; American Diabetes Association; Beth Israel Medical Center, NY

Language: English, Polish, Russian


Endocrinology, Diabetes and Metabolism

Insurance Accepted

  • Medicare Assignment
  • Alberto Culver Company
  • Admar PPO
  • Aetna Health Plan PPO
  • Blue Cross Blue Shield PPO
  • Blue Cross Blue Shield MCNP
  • Blue Cross Blue Shield POS
  • Berlin Industries PPO
  • Blue Choice
  • Blue Advantage Plus PPO
  • Beech Street PPO
  • Cappcare
  • Community Care Network
  • CCN Elect POS
  • Cigna Healthplan PPO
  • Cigna Healthplan POS
  • Cigna Select Source Plus
  • Epiqual CCN
  • Epiqual PPO
  • Foremost PPO
  • Healthcare Finest Network PPO
  • Humana PPO
  • Health Network PPO
  • National Provider Network PPO
  • Preferred Health Network PPO
  • Preferred Network Access
  • Preferred Plan PPO
  • United Healthcare PPO
  • Unicare
  • Medicare Advantage Plan
  • Aetna Medicare Advantage
  • Humana Medicare Advantage
  • United Healthcare Medicare Advantage
  • Blue Cross Blue Shield Medicare Advantage


This provider is an independent medical practitioner who has been permitted to use the hospital's facilities and to exercise his or her independent medical judgment in the care and treatment of his or her patient.