Dr William J Mackin, MD - Medicare Cardiovascular Disease (cardiology) in Geneva, IL

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Dr William J Mackin, MD is a medicare enrolled "Internal Medicine - Cardiovascular Disease" physician in Geneva, Illinois. He went to Temple University School Of Medicine and graduated in 1982 and has 44 years of diverse experience with area of expertise as Cardiovascular Disease (cardiology). He is a member of the group practice Lakeland Hospitals At Niles And St Joseph Inc and his current practice location is 351 Delnor Dr, Suite 100, Geneva, Illinois. You can reach out to his office (for appointments etc.) via phone at (630) 232-0280.

Dr William J Mackin is licensed to practice in Illinois (license number 036077645) 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 1215924949.

Contact Information

Dr William J Mackin, MD
351 Delnor Dr, Suite 100,
Geneva, IL 60134-4220
(630) 232-0280
(630) 232-3895

Map and Direction




Physician's Profile

Full NameDr William J Mackin
GenderMale
SpecialityCardiovascular Disease (cardiology)
Experience44 Years
Location351 Delnor Dr, Geneva, 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:
  • Dr William J Mackin attended and graduated from Temple University School Of Medicine in 1982
  NPI Data:
  • NPI Number: 1215924949
  • Provider Enumeration Date: 09/27/2005
  • Last Update Date: 04/20/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4688577679
  • Enrollment ID: I20250424001437

Medical Identifiers

Medical identifiers for Dr William J Mackin such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1215924949NPI-NPPES
036077645MedicaidIL
100298082MedicaidWI
206147OtherILMEDICARE PTAN (GROUP)
206147058OtherILMEDICARE PTAN (INDIVIDUAL)

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RC0000XInternal Medicine - Cardiovascular Disease 4301053298 (Michigan)Secondary
207RC0000XInternal Medicine - Cardiovascular Disease MED-PHYS-COM-143864 (Montana)Secondary
207RC0000XInternal Medicine - Cardiovascular Disease 036077645 (Illinois)Primary
207RI0011XInternal Medicine - Interventional Cardiology 036077645 (Illinois)Secondary
207RI0011XInternal Medicine - Interventional Cardiology 4761-320 (Wisconsin)Secondary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Cheyenne Regional Medical CenterCheyenne, WYHospital
Corewell Health Lakeland Hospitals St Joseph HospiSt joseph, MIHospital
Tristar Greenview Regional HospitalBowling green, KYHospital
The Medical Center At Bowling GreenBowling green, KYHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Lakeland Hospitals At Niles And St Joseph Inc7517929037134

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. Dr William J Mackin allows following entities to bill medicare on his behalf.
Entity NameLakeland Community Hospital Watervliet
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023114741
PECOS PAC ID: 7416942750
Enrollment ID: O20040416000984
Entity NameLakeland Hospitals at Niles and St Joseph Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1134220031
PECOS PAC ID: 7517929037
Enrollment ID: O20041027001172
Entity NameLakeland Medical Practices
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1538397120
PECOS PAC ID: 1658427042
Enrollment ID: O20090928000216

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. Dr William J Mackin 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
Dr William J Mackin, MD
351 Delnor Dr, Suite 100,
Geneva, IL 60134-4220

Ph: (630) 232-0280		Dr William J Mackin, MD
351 Delnor Dr, Suite 100,
Geneva, IL 60134-4220

Ph: (630) 232-0280

Reviews and Comments


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Elisa A Hofmann, M.D.
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Raheemuddin Nazeer, M.D.
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Harsh Bipin Patel,
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Practice Location: 300 Randall Rd, Geneva, IL 60134
Phone: 630-933-4700    Fax: 630-933-4427

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).

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