(630) 574-0460

ADULT & PEDIATRIC

PHYSICIANS

EXPERT ALLERGY DOCTORS

Dr. Knysak, one of our allergy doctors in Oak Brook, IL

DAVID J. KNYSAK, M.D.

Experience

Practicing medicine since 1982

Fellowship

Allergy, Asthma and Immunology University of Michigan Medical Center, Ann Arbor, Michigan

Residency

Internal Medicine Jewish Hospital of St. Louis/Washington University

Internship

Internal Medicine, Jewish Hospital of St. Louis/Washington University

Medical School

Northwestern University Medical School

Board Certifications

American Board of Internal Medicine

American Board of Allergy and Immunology

 

 

Professional Associations

American Academy of Allergy, Asthma and Immunology

American College of Allergy, Asthma and Immunology

Past President, Illinois Society of Allergy, Asthma and Immunology

RAYMOND M. PONGONIS JR., M.D.

Dr. Pongonis, one of our allergy doctors in Oak Brook, IL

Experience

Practicing medicine since 2012

Fellowship

Vanderbilt University, Nashville, Tennessee

Residency

McGaw Medical Center of Northwestern University, Evanston, Illinois

Internship

McGaw Medical Center of Northwestern University, Evanston, Illinois

Medical School

The Ohio State University College of Medicine, Columbus, Ohio

Board Certifications

American Board of Allergy and Immunology

American Board of Internal Medicine

 

 

Professional Associations

American Academy of Allergy, Asthma and Immunology

Alpha Omega Alpha Honor Society

MELISSA K. SKUPIN, M.D.

Dr. Skupin, one of our allergy doctors in Oak Brook, IL

Experience

Practicing medicine since 2016

Fellowship

Henry Ford Hospital/Wayne State University, Detroit, MI

Residency/Internship

Henry Ford Hospital/Wayne State University, Detroit, MI

Medical School

American University of the Caribbean, St. Maarten, Netherlands Antilles

Board Certifications

American Board of Allergy and Immunology

American Board of Internal Medicine

 

 

Professional Associations

American College of Allergy, Asthma and Immunology

American Academy of Allergy, Asthma and Immunology

Jennifer K. Catalfio, PA-C, one of our physician assistants in Oak Brook, IL

JENNIFER K. CATALFIO, PA-C

Education

Master of Physician Assistant Studies
Marquette University
Milwaukee, WI
Bachelor of Science, Biomedical Sciences
Marquette University
Milwaukee, WI

 

 

 

 

Board Certifications

Board-Certified Physician Assistant by National Commission on Certification of Physician Assistants
Illinois Licensed Physician Assistant

 

 

 

 

 

 

 

 

 

 

 

HISTORY

Dr. Joseph Cece founded Oak Brook Allergists in 1962. At that time, he was the only practicing Allergist in DuPage County. Shortly after Oak Brook Allergists was established, Dr. Cece invited a colleague from Michael Reese Hospital, Dr. Harold Leichenko, to join him.

 

Dr. David Knysak joined Drs. Cece and Leichenko in 1988. Dr. Knysak was a Clinical Instructor at the University of Michigan before entering private practice. Dr. Cece passed away in 1992, and Dr. Leichenko retired in 2003.

Dr. Knysak's experience has been instrumental in our continuing success. Oak Brook Allergists has grown to four office locations, board certified/board eligible allergists, a support staff which includes registered nurses, experienced receptionists, and our own billing and insurance department.

LOCATIONS & HOURS