William J Ennis, DO - Medicare Family Practice in Chicago, IL

William J Ennis, DO is a medicare enrolled "Family Medicine" physician in Chicago, Illinois. He went to New York College Of Osteo Medicine Of New York Institute Of Technology and graduated in 1985 and has 39 years of diverse experience with area of expertise as Family Practice. He is a member of the group practice The Board Of Trustees Of The University Of Illinois and his current practice location is 1801 W Taylor St, Chicago, Illinois. You can reach out to his office (for appointments etc.) via phone at (312) 996-3253.

William J Ennis is licensed to practice in Illinois (license number 036084083) 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 1649225988.

Contact Information

William J Ennis, DO
1801 W Taylor St,
Chicago, IL 60612
(312) 996-3253
(312) 413-0495

Map and Direction




Physician's Profile

Full NameWilliam J Ennis
GenderMale
SpecialityFamily Practice
Experience39 Years
Location1801 W Taylor St, Chicago, 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:
  • William J Ennis attended and graduated from New York College Of Osteo Medicine Of New York Institute Of Technology in 1985
  NPI Data:
  • NPI Number: 1649225988
  • Provider Enumeration Date: 05/24/2006
  • Last Update Date: 06/16/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 9436139813
  • Enrollment ID: I20040726000220

Medical Identifiers

Medical identifiers for William J Ennis such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1649225988NPI-NPPES
036084083MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 036084083 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
University Of Illinois HospitalChicago, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
The Board Of Trustees Of The University Of Illinois3072422716923

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. William J Ennis allows following entities to bill medicare on his behalf.
Entity NameThe Board Of Trustees Of The University Of Illinois
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1386863819
PECOS PAC ID: 3072422716
Enrollment ID: O20031112000158

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. William J Ennis 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
William J Ennis, DO
20201 Crawford Ave,
Olympia Fields, IL 60461-1010

Ph: (708) 679-2473
William J Ennis, DO
1801 W Taylor St,
Chicago, IL 60612

Ph: (312) 996-3253

Reviews and Comments


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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.