Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

David J Knysak, MD

Individual provider Allergy & Immunology Physician · NPI 1609876101

David J Knysak, MD is an Allergy/Immunology in Elmhurst, Illinois. Graduated from Northwestern University Feinberg Medical School in 1982, 44 years ago. Practices with Oak Brook Allergists SC, a 3-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
44
Trained at
Northwestern University Feinberg Medical School
Licensed in
IL
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

360 W Butterfield Rd Ste 140
Elmhurst, IL 60126-5025
Phone: (630) 574-0460
Fax: (630) 574-0470
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence 036076995 (IL)

Record details

NPI number1609876101
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 26, 2005
Last updated in NPPESMarch 12, 2018
Mailing address360 W Butterfield Rd Ste 140, Elmhurst, IL 60126-5025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1982 (44 years in practice)
Group practice Oak Brook Allergists Sc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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