Andrew Jasek, MD

Andrew Jasek, MD

As one of the four Rheumatology specialists on our team, I would like to welcome you to Ortho Illinois! I was born and raised in Poland, where I received my medical degree and began my career as a neurologist in Warsaw, Poland. After practicing for three years, I relocated to the United States where I completed three additional years of residency training in internal medicine in Pennsylvania before moving to practice medicine at what is now known as Rockford Health System. I further specialized and established my rheumatology practice at Mercy Clinic in Janesville for nine years before joining OrthoIllinois.

Many people wonder what a Rheumatologist is, or why they are being referred to a Rheumatologist when they don’t have “arthritis.” Rheumatologists manage many conditions, seeing patients from adolescent years to geriatric.

So what do Rheumatologists do? In my practice I see a wide spectrum of diseases. While I have a special interest in treating rheumatoid arthritis and other inflammatory diseases, I provide care for osteoarthritis, lupus, Sjogren’s disease, connective tissue disease, gout and pseudo-gout, scleroderma, derma myositis/polymyositis, and vasculitis. I also treat osteoporosis and am certified in bone densitometry.

Providing my patients with an accurate diagnosis is key to helping them begin to resume a more active lifestyle. To do so requires listening carefully to my patients’ symptoms, having a good understanding of many types of disorders and their manifestations, reviewing lab tests and sometimes utilizing musculoskeletal ultrasound for diagnosis. This “detective work” is precisely why I was drawn to Rheumatology.

I believe treating my patients involves working together in partnership. Educating my patients in plain language is vital for them to understand the diagnosis, the treatment plan and how to prevent disease progression or the development of additional conditions.

Rheumatology is an ever-evolving specialty with new treatments continually being developed. At OrthoIllinois we are excited to be at the forefront of improvements in care by actively being involved in clinical research trials for various conditions.

When I am not practicing medicine, I enjoy computers and the arts. I am a movie enthusiast, attend theatrical productions, and paint in oils. I am also multi-lingual and speak English, Polish, Russian, and German.

I again welcome you to OrthoIllinois and look forward to providing you with compassionate care.

Andrew Jasek, MD

BACHELOR’S DEGREE State College No 17 A.F., Modrzewski Memorial, Warsaw, Poland
MEDICAL DEGREE Warsaw School of Medicine
RESIDENCY Abington Memorial Hospital and Medical College of Pennsylvania
FELLOWSHIP Rheumatology, University of Illinois

Insurance Questions?

Dr. Jasek and Ortho Illinois accept multiple insurance providers. To see a list of insurances accepted click here. Contact your insurance carrier for you specific plan details.


  • Board certified: American Board of Rheumatology
  • Board certified: American Board of Internal Medicine
  • Certification: Bone Densitometry
  • Member: American College of Rheumatology
  • Member: American Medical Association
  • Member: International Society of Clinical Densitometry

Hospital Affiliations


Posted: 2019-02-26
I'm very thankful and happy to have Dr. Jasek. He has always taken the time to explain things to me. Good person very professional and courteous.

Posted: 2019-02-26
Dr. Jasek is caring and very concerned about his treatment to me. He is the best.

Posted: 2019-02-26
Always very friendly, makes me feel very comfortable.

Posted: 2019-01-23
Dr Jasek is always a caring doctor. He always does a great exam, asks if I have any questions or issues I'd like to bring up, and he's very informative and makes sure I understand my treatment. Highly recommend Dr Jasek.

Posted: 2019-01-19
I was very pleased with the care I received. He gave me a very clear picture of my disease and treatment. I would highly recommend him to anyone in need of a Rheumatologist.

Posted: 2019-01-13
I LOVE Dr. Jasek and his team. I am so very thankful that I have them.

Posted: 2018-12-27
A+ professionalism, alternatives/choices, friendly personality and empathetic.

Posted: 2018-12-11
I have recommended Dr Jasek and OrthoIllinois to others and they have been grateful. Dr Jasek is an exceptional rheumatologist and we are very fortunate to have him in the Stateline area.

Posted: 2018-11-27
He took his time and made sure I didn't have any questions.

Posted: 2018-11-27
Dr. Jacek is excellent. I feel confident in him and the treatment I am receiving. He really cares about me.

Posted: 2018-11-22
Dr. Jasek is always professional, caring and pleasant. He listened to my problems, and works with me to find a way to help.

Posted: 2018-11-11

Posted: 2018-11-07
Dr Jasek is a great doctor.

Posted: 2018-10-26
All good

Posted: 2018-10-25
My wife who has worked in health care for many years was with me. She was extremely impressed with Doctor Jasek's thoroughness.

Posted: 2018-10-25

Posted: 2018-10-25
Dr seems so focused on me when I am there.

Posted: 2018-09-16
Dr. Jasek is a compassionate doctor. He is easy to understand and very easy to talk to. I am happy he is my doctor. I wish he could be my primary care physician!

Posted: 2018-08-30
I was extremely satisfied with everything.

Posted: 2018-08-30
Dr Jasek is the best!