David J Knysak, MD - Medicare Allergy/immunology in Elmhurst, IL

David J Knysak, MD is a medicare enrolled "Allergy & Immunology" physician in Elmhurst, Illinois. He went to Northwestern University Feinberg Medical School and graduated in 1982 and has 42 years of diverse experience with area of expertise as Allergy/immunology. He is a member of the group practice Oak Brook Allergists Sc and his current practice location is 360 W Butterfield Rd Ste 140, Elmhurst, Illinois. You can reach out to his office (for appointments etc.) via phone at (630) 574-0460.

David J Knysak is licensed to practice in Illinois (license number 036076995) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1609876101.

Contact Information

David J Knysak, MD
360 W Butterfield Rd Ste 140,
Elmhurst, IL 60126-5025
(630) 574-0460
(630) 574-0470

Map and Direction




Physician's Profile

Full NameDavid J Knysak
GenderMale
SpecialityAllergy/immunology
Experience42 Years
Location360 W Butterfield Rd Ste 140, Elmhurst, Illinois
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • David J Knysak attended and graduated from Northwestern University Feinberg Medical School in 1982
  NPI Data:
  • NPI Number: 1609876101
  • Provider Enumeration Date: 07/26/2005
  • Last Update Date: 03/12/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 8628072246
  • Enrollment ID: I20100618000826

Medical Identifiers

Medical identifiers for David J Knysak such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1609876101NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207K00000XAllergy & Immunology 036076995 (Illinois)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Oak Brook Allergists Sc79119015253

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. David J Knysak allows following entities to bill medicare on his behalf.
Entity NameOak Brook Allergists Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700819117
PECOS PAC ID: 7911901525
Enrollment ID: O20060912000543

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. David J Knysak is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
David J Knysak, MD
360 W Butterfield Rd Ste 140,
Elmhurst, IL 60126-5025

Ph: (630) 574-0460
David J Knysak, MD
360 W Butterfield Rd Ste 140,
Elmhurst, IL 60126-5025

Ph: (630) 574-0460

Reviews and Comments


Allergy & Immunology Doctors in Elmhurst, IL

Dr. Jeffrey James Kulik, MD
Allergy & Immunology
Medicare: Accepting Medicare Assignments
Practice Location: 172 E Schiller St, Elmhurst, IL 60126
Phone: 331-221-9195    Fax: 331-221-2305
Zachary Rubin,
Allergy & Immunology
Medicare: Accepting Medicare Assignments
Practice Location: 360 W Butterfield Rd Ste 140, Elmhurst, IL 60126
Phone: 630-574-0460    Fax: 630-574-0470

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.