Dr William H Kobak, MD - Medicare Obstetrics/gynecology in St Charles, IL

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Dr William H Kobak, MD is a medicare enrolled "Obstetrics & Gynecology - Gynecology" physician in St Charles, Illinois. He went to Indiana University School Of Medicine and graduated in 1989 and has 36 years of diverse experience with area of expertise as Obstetrics/gynecology. He is a member of the group practice Cook County, The Board Of Trustees Of The University Of Illinois and his current practice location is 3310 W Main St, Suite 200, St Charles, Illinois. You can reach out to his office (for appointments etc.) via phone at (630) 897-6044.

Dr William H Kobak is licensed to practice in Illinois (license number 036091917) 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 1023007887.

Contact Information

Dr William H Kobak, MD
3310 W Main St, Suite 200,
St Charles, IL 60175-1000
(630) 897-6044
(630) 897-0180

Map and Direction




Physician's Profile

Full NameDr William H Kobak
GenderMale
SpecialityObstetrics/gynecology
Experience36 Years
Location3310 W Main St, St Charles, 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 H Kobak attended and graduated from Indiana University School Of Medicine in 1989
  NPI Data:
  • NPI Number: 1023007887
  • Provider Enumeration Date: 10/14/2005
  • Last Update Date: 01/29/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 8022073352
  • Enrollment ID: I20041129000048

Medical Identifiers

Medical identifiers for Dr William H Kobak such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1023007887NPI-NPPES
036091917MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207V00000XObstetrics & Gynecology 036091917 (Illinois)Secondary
207VG0400XObstetrics & Gynecology - Gynecology 036091917 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
University Of Illinois HospitalChicago, ILHospital
John H Stroger Jr HospitalChicago, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Cook County2860398088698
The Board Of Trustees Of The University Of Illinois30724227161058

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 H Kobak 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
Entity NameThe Board Of Trustees Of The University Of Illinois
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1154541936
PECOS PAC ID: 3072422716
Enrollment ID: O20031201000021
Entity NameCook County
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1588612832
PECOS PAC ID: 2860398088
Enrollment ID: O20031209000747
Entity NameMount Sinai Community Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376715896
PECOS PAC ID: 5991600405
Enrollment ID: O20040202001032

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 H Kobak 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 H Kobak, MD
Po Box 657,
St Charles, IL 60174-0657

Ph: (630) 897-6044		Dr William H Kobak, MD
3310 W Main St, Suite 200,
St Charles, IL 60175-1000

Ph: (630) 897-6044

Reviews and Comments


Obstetrics & Gynecology Doctors in St Charles, IL

Edward M Newman, D.O.
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 3310 W Main St, Suite 200, St Charles, IL 60175
Phone: 630-897-6044    Fax: 630-897-0180
Dr. Teresa L. Homan, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 3310 W Main St, Suite 200, St Charles, IL 60175
Phone: 630-897-6044    Fax: 630-897-0180
Nicole M Witte, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 2900 Foxfield Rd, Suite 306, St Charles, IL 60174
Phone: 630-845-2500    Fax: 630-845-9928
Dr. Leticia Gonzalez, M.D.
Obstetrics & Gynecology
Medicare: Accepting Medicare Assignments
Practice Location: 3310 W Main St, Suite 200, St Charles, IL 60175
Phone: 630-897-6044    Fax: 630-897-0180
Stewart I Odell, MD
Obstetrics & Gynecology
Medicare: Not Enrolled in Medicare
Practice Location: 2310 Dean St, St Charles, IL 60175
Phone: 630-584-8984    Fax: 630-584-1308
Daniel James Lee, MD
Obstetrics & Gynecology
Medicare: Medicare Enrolled
Practice Location: 2310 Dean St, St Charles, IL 60175
Phone: 630-584-8984    Fax: 630-584-1308

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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