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Allergy Crystal Lake - Fan Choice Aword
Allergy Crystal Lake - Fan Choice Aword Dr. Hahn

About Us

" I LOVE this practice. The entire staff is very professional and personable. I would highly recommend them to anyone who has searching for an allergist who sincerely cares and takes the time to listen to any issues you may be experiencing. You will not be disappointed. I have sent several friends and colleagues, all have been very impressed with the care they received! Best Allergy in the area! "

~ Amy P.
Advanced Allergy & Asthma Associates/Food Allergy Center of Illinois is a respected medical practice, serving residents of Northern Illinois with three conveniently located offices, in Crystal Lake, Elgin, and Lake Barrington. Our practice was founded on the simple principles of compassion and customer service, blended with the advanced science of modern medicine.

Our physicians and staff members are highly trained, skilled, and deeply caring individuals. Our patients are our friends and neighbors, whom we think of as our extended family. We strive to deliver the same quality of care and level of service that we would want our own beloved parents, children, or other family members to receive.

Mission Statement


“We, at Advanced Allergy & Asthma Associates/Food Allergy Center of Illinois, are committed to providing the highest quality of care with passion and empathy, strive towards professional excellence, and to be in tune with the needs and expectations of our patients, referring doctors and our community”

Meet our Providers



Noga Askenazi M.D.


Asthma Specialist in Barrington - Dr. Noga AskenaziDr. Askenazi is a board certified asthma and allergy specialist, who treats children and adults. She has been a national speaker and has served as president of the ISAAI (Illinois Society of Allergy, Asthma and Immunology).

In 2007, Dr. Askenazi went into private practice in Lake, Kane, and McHenry counties with the goal of providing state-of-the-art treatment for individuals suffering from a broad spectrum of allergies and related diseases. Her primary focus is providing quality care with compassion. She treats every patient as she would a member of her own family.

When you visit Advanced Allergy & Asthma Associates/Food Allergy Center of Illinois, you will discover that her exceptional staff is dedicated to meeting the needs of every patient, and they will make you feel like a member of the family.

Dr. Askenazi treats a broad range of allergic conditions, with a special interest in innovative treatments of food allergies, eosinophilic esophagitis (allergy-associated inflammation of the esophagus), and atopic dermatitis (eczema) associated with food intolerances and allergies.

Friends and patients describe Dr. Askenazi as a hard-working, down-to-earth, friendly, passionate, approachable individual and has a great sense of humor. She is married, and the proud mother of a daughter and son. When not working, she enjoys spending time outdoors biking and hiking. She also enjoys cooking and reading.

Credentials

Dr. Askenazi has trained at some of the finest educational institutions in the Midwest:
  • Allergy and Immunology Fellowship, at Rush Presbyterian St. Luke’s Medical Center of Chicago, IL
  • Pediatrics residency at Rush Presbyterian St. Luke’s Medical Center of Chicago, IL
  • Internship at Rush Presbyterian St. Luke’s Medical Center of Chicago, IL
  • M.D. (Doctor of Medicine) at the University of Tel Aviv in Israel
  • B.S. (Bachelor of Science) at Washington University of St.Louis, MO
Dr. Askenazi maintains active membership in the following professional organizations:
  • 2011 through 2012 – President of the ISAAI (Illinois Society of Allergy, Asthma, & Immunology)
  • 2010 through 2011 – President Elect of the ISAAI (Illinois Society of Allergy, Asthma, & Immunology)
  • Current – ISAAI (Illinois Society of Allergy, Asthma, & Immunology) committee member
  • Fellow of the FACAAI (American College of Allergy, Asthma, & Immunology)
  • Voting Fellow of the FAAAAI (American Academy of Allergy, Asthma, & Immunology)
  • Member of the (AMA American Medical Association)
  • Fellow of the AAP (American Academy of Pediatrics)

Eugenia Hahn, M.D.


Asthma Specialist in Barrington - Dr. Eugenia HahnDr. Eugenia Hahn, M.D is a Midwesterner, having grown up in the Chicagoland area and returning here after training out of the area. She is a very well respected board certified allergist and immunologist, able to treat children and adults with an array of immunological disorders. As an allergy sufferer herself, she understands the need of taking her time with her patients to develop a personalized treatment plan incorporating each individual’s lifestyle. Her goals are to help patients and their families understand their condition, to help them to attain the best quality of life possible, and reach their aspirations without limitations due to allergies or asthma.

Those who know Dr. Hahn are touched of how thoughtful, warm and caring she is. She is soft spoken but enjoys empowering her patients and their families with the strength of knowledge. She loves to learn about new and different things and share this with others.

She is married and has a young son and daughter. Her interests outside the office include gardening, running, yoga, and reading.

Though she is clinically experienced in all aspects of allergy and immunology including allergic rhinitis, sinusitis, rashes, and eosinophilic disorders, her special interests are in food allergy, eczema, and asthma.
  • M.D. (Doctor of Medicine) at University of Rochester, Rochester, NY
  • B.S. (Bachelor of Science) Massachusetts Institute of Technology, Cambridge, MA
  • Fellowship: Allergy & Immunology, Washington University, St. Louis, MO
  • Residency: Pediatrics, Children’s Hospital Los Angeles, Los Angeles,CA
Dr. Hahn maintains active membership in the following professional organizations:
  • Fellow, American Academy of Allergy, Asthma, and Immunology
  • Member, American College of Allergy, Asthma, and Immunology
  • Member, Joint Council of Allergy, Asthma, and Immunology

Dr. Dipika Patel


Asthma Specialist in Barrington - Dr. Dipika Patel
Dr. Dipika Patel is a native Chicagoan who is excited to return to the area after completing her training in Houston. She is qualified to see adults and children with a variety of allergic and immunologic diseases. Her specific interests include food allergy with an emphasis on food allergy education in the school system and impact on quality of life. She also has a strong background in diagnosing and treating patient with immunodeficiencies. Her patients appreciate her approachability, and ability to listen to and comprehensively address all their concerns. Her publications and qualifications are listed below:

"Linking newborn severe combined immunodeficiency screening with targeted exome sequencing: A case report" for The Journal of Allergy and Clinical Immunology: In Practice. 2017 Apr 21.

"Long-term Increase in Epinephrine Availability associated with School Nurse Training in Food Allergy." The Journal of Allergy and Clinical Immunology: In Practice. 2015 Jan-Feb.

"Quality of Life for Parents of Children with Food Allergy in Peanut-Restricted versus Peanut-Free Schools in US and Canada" accepted to The Journal of Allergy and Clinical Immunology: In Practice with final publication pending

M.D. (Doctor of Medicine) at University of Illinois at Chicago College of Medicine B.S. (Bachelor of Science) University of Michigan at Ann Arbor, MI
Fellowship: Allergy & Immunology, Baylor College of Medicine, Houston, TX
Residency: Pediatrics, Baylor College of Medicine, Houston, TX

Dr. Patel maintains active membership in the following professional organizations:

Fellow, American Academy of Allergy, Asthma, and Immunology Member, American College of Allergy, Asthma, and Immunology

Dr. Patel has participated in multiple national meetings

2014 – Presented "Longitudinal Effect of Food Allergy Education on Epinephrine Availability in Public Schools" at the annual meeting of the AAAAI (American Academy of Allergy, Asthma & Immunology)

2016- Presented "Linking newborn severe combined immunodeficiency screening with targeted exome sequencing: A case report" at annual meeting of the ACAAI (American College of Allergy, Asthma and Immunology

2017 – Poster Presentation at the annual meeting of the AAAAI (American Academy of Allergy, Asthma & Immunology)

2017- Poster Presentation at AAAAI (American Academy of Allergy, Asthma & Immunology)

Outside of the office, Dr. Patel enjoys traveling, reading, and spending quality time with her family and friends.

5 Star Review Banner - Dr. Dipika Patel

Ashley Cochran, CFNP, AE-C


Asthma Specialist in Barrington - Ashley CochranAshley Cochran has over 16 years of experience as a Nurse Practitioner. Her career spanned family practice, pediatrics, emergency medicine, urgent care, and public health before committing to the specialty of Allergy & Asthma. She is also a nationally recognized asthma educator. She has not only achieved great national recognition but has assisted others achieve excellence in nursing serving as adjunct professor at the School of Nursing at Loyola University in New Orleans & Chicago.

She believes in life-long learning and providing state-of-the-art care to her patients. She is dedicated to assisting individuals and families lead full lives using individualized, patient-centered treatment plans. Her vivacious personality and enthusiasm is palpable and immediately puts her patients at ease.

She grew up in the Mississippi Delta before moving to Crystal Lake and considers the Midwest her home. She is married and has 2 sons and a daughter. Her children are her pride and joy. All of her children have been diagnosed with asthma and allergies. Therefore, she personally understands the challenges associated with these disease processes. Those who know her describe her as a perpetual optimist with endless compassion. Outside of work and being a devoted mother, she enjoys reading, travel, and bicycle trips.

Education and Credentials:
  • Undergraduate: Illinois Wesleyan University - Major in Bachelor of Science in Nursing
  • Graduate: Loyola University, New Orleans
  • Teaching: Advanced Health Assessment in New Orleans, APA Practicum in Chicago
  • Experience:
    • Family Practice (Louisiana) 2000 - 2002
    • Urgent Care (Louisiana) 2002 – 2004
    • Emergency Medicine (Sherman Hospital) 2005 – 2009
    • Occupational Health (Advocate) 2010 – 2011
    • Immediate Care/Occupational Health (Centegra) 2011 – 2016
    • Pediatrics (Centegra) 2015 - 2016
  • Certified Asthma Educator 2016