Dr Catherine J Koop, MD - Medicare Internal Medicine in Oak Park, IL

Dr Catherine J Koop, MD is a medicare enrolled "Internal Medicine" physician in Oak Park, Illinois. She went to Rush Medical College Of Rush University and graduated in 1995 and has 29 years of diverse experience with area of expertise as Internal Medicine. She is a member of the group practice Rush Oak Park Physicians Group Adult Medicine and her current practice location is 610 S. Maple, Suite 4600, Oak Park, Illinois. You can reach out to her office (for appointments etc.) via phone at (708) 660-2240.

Dr Catherine J Koop is licensed to practice in Illinois (license number 036-096959) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1851358972.

Contact Information

Dr Catherine J Koop, MD
610 S. Maple, Suite 4600,
Oak Park, IL 60304
(708) 660-2240
(708) 660-2243

Map and Direction




Physician's Profile

Full NameDr Catherine J Koop
GenderFemale
SpecialityInternal Medicine
Experience29 Years
Location610 S. Maple, Oak Park, Illinois
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Catherine J Koop attended and graduated from Rush Medical College Of Rush University in 1995
  NPI Data:
  • NPI Number: 1851358972
  • Provider Enumeration Date: 05/01/2006
  • Last Update Date: 07/21/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 1456481563
  • Enrollment ID: I20100617000026

Medical Identifiers

Medical identifiers for Dr Catherine J Koop such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1851358972NPI-NPPES
036096959MedicaidIL

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 036096959 (Illinois)Secondary
207R00000XInternal Medicine 036-096959 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Rush Oak Park HospitalOak park, ILHospital
Rush University Medical CenterChicago, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Rush Oak Park Physicians Group Adult Medicine347671652320

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 Catherine J Koop allows following entities to bill medicare on her behalf.
Entity NameRush Oak Park Physicians Group Adult Medicine
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1548531924
PECOS PAC ID: 3476716523
Enrollment ID: O20120529000606

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 Catherine J Koop 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 Catherine J Koop, MD
610 S. Maple, Suite 4600,
Oak Park, IL 60304

Ph: (708) 660-2240
Dr Catherine J Koop, MD
610 S. Maple, Suite 4600,
Oak Park, IL 60304

Ph: (708) 660-2240

Reviews and Comments


Internal Medicine Doctors in Oak Park, IL

Dr. Kristen Eileen Tobin Vealey, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1121 South Blvd, Oak Park, IL 60302
Phone: 708-745-5744    Fax: 708-398-6890
Mr. Daniel B Stroupe, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 610 S Maple Ave Ste 4050, Oak Park, IL 60304
Phone: 708-383-0943    Fax: 708-613-4382
Dr. Ankur Sethi, MD
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Medicare: Accepting Medicare Assignments
Practice Location: 7035 North Ave, Oak Park, IL 60302
Phone: 708-680-3800    
Dr. Terry Lynn Clarbour, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1033 Randolph St, Oak Park, IL 60302
Phone: 708-955-8033    Fax: 708-445-8444
Paul Balter, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 855 Madison St, Oak Park, IL 60302
Phone: 708-386-1000    Fax: 708-386-2394
Steve Michel, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 965 Lake St, Oak Park, IL 60301
Phone: 708-386-3000    
Max L Harris, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 3 Erie Ct, L700, Oak Park, IL 60302
Phone: 708-763-2536    Fax: 708-383-7655

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.