Daniel J Grzegorek, DO - Medicare Internal Medicine in Willowbrook, IL

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Daniel J Grzegorek, DO is a medicare enrolled "Internal Medicine" physician in Willowbrook, Illinois. He went to Chicago College Of Osteopathy and graduated in 1992 and has 32 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Legacy Healthcare Services Inc, Dupage Medical Group Ltd and his current practice location is 6733 Kingery Hwy, Willowbrook, Illinois. You can reach out to his office (for appointments etc.) via phone at (630) 325-4049.

Daniel J Grzegorek is licensed to practice in Illinois (license number 036-089211) 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 1487651337.

Contact Information

Daniel J Grzegorek, DO
6733 Kingery Hwy,
Willowbrook, IL 60527-5142
(630) 325-4049
Not Available

Map and Direction




Physician's Profile

Full NameDaniel J Grzegorek
GenderMale
SpecialityInternal Medicine
Experience32 Years
Location6733 Kingery Hwy, Willowbrook, 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:
  • Daniel J Grzegorek attended and graduated from Chicago College Of Osteopathy in 1992
  NPI Data:
  • NPI Number: 1487651337
  • Provider Enumeration Date: 07/07/2005
  • Last Update Date: 08/08/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0749273183
  • Enrollment ID: I20040403000087

Medical Identifiers

Medical identifiers for Daniel J Grzegorek such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1487651337NPI-NPPES
036089211MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 036-089211 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Residential Home HealthDowners grove, ILHome health agency
Advocate Home Health Care ServLombard, ILHome health agency
Residential Hospice LlcDowners grove, ILHospice
Angels Grace HospiceBolingbrook, ILHospice
Adventist Hinsdale HospitalHinsdale, ILHospital
Elmhurst Memorial HospitalElmhurst, ILHospital
Burgess Square Healthcare CtrWestmont, ILNursing home
Manorcare Of HinsdaleHinsdale, ILNursing home
Providence Downers GroveDowners grove, ILNursing home
Alden Estates Of ShorewoodShorewood, ILNursing home
Ascension Villa FranciscanJoliet, ILNursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Legacy Healthcare Services Inc21633397223341
Dupage Medical Group Ltd54966679411186

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. Daniel J Grzegorek allows following entities to bill medicare on his behalf.
Entity NameDupage Medical Group Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801833983
PECOS PAC ID: 5496667941
Enrollment ID: O20031110000535

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. Daniel J Grzegorek 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
Daniel J Grzegorek, DO
Po Box 713260,
Chicago, IL 60677-1260

Ph: (630) 469-9200		Daniel J Grzegorek, DO
6733 Kingery Hwy,
Willowbrook, IL 60527-5142

Ph: (630) 325-4049

Reviews and Comments


Internal Medicine Doctors in Willowbrook, IL

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Angela R. Crowley, M.D.
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Suriya Sastri, M.D.
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Phone: 630-325-8684    Fax: 630-325-2490
Dr. Rathna K Yallapragada, M.D.
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Phone: 630-323-8595    Fax: 630-735-5138
Roland Anthony Borrasi, MD
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Practice Location: 15 W 720 89th, Willowbrook, IL 60527
Phone: 815-886-8037    Fax: 815-886-3392

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.