Janet Marie Nielsen, MD - Medicare Family Practice in Naperville, IL

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Janet Marie Nielsen, MD is a medicare enrolled "Family Medicine" physician in Naperville, Illinois. She went to University Of Illinois College Of Med (chi/peor/rock/chm-urb) and graduated in 2007 and has 19 years of diverse experience with area of expertise as Family Practice. She is a member of the group practice Loyola University Medical Center and her current practice location is 1160 E Ogden Ave Ste 106, Naperville, Illinois. You can reach out to her office (for appointments etc.) via phone at (331) 226-0315.

Janet Marie Nielsen is licensed to practice in Illinois (license number 036.127246) 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 1679773980.

Contact Information

Janet Marie Nielsen, MD
1160 E Ogden Ave Ste 106,
Naperville, IL 60563-2693
(331) 226-0315
(844) 689-2582

Map and Direction




Physician's Profile

Full NameJanet Marie Nielsen
GenderFemale
SpecialityFamily Practice
Experience19 Years
Location1160 E Ogden Ave Ste 106, Naperville, 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:
  • Janet Marie Nielsen attended and graduated from University Of Illinois College Of Med (chi/peor/rock/chm-urb) in 2007
  NPI Data:
  • NPI Number: 1679773980
  • Provider Enumeration Date: 07/24/2007
  • Last Update Date: 09/02/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 9830254473
  • Enrollment ID: I20120823000632

Medical Identifiers

Medical identifiers for Janet Marie Nielsen such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1679773980NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 036.127246 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Loyola University Medical CenterMaywood, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Loyola University Medical Center3779488903926

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. Janet Marie Nielsen allows following entities to bill medicare on her behalf.
Entity NameDupage Medical Group Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1801833983
PECOS PAC ID: 5496667941
Enrollment ID: O20031110000535
Entity NameLoyola University Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336159961
PECOS PAC ID: 3779488903
Enrollment ID: O20031202000027
Entity NameGottlieb Memorial Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1831170232
PECOS PAC ID: 9234156233
Enrollment ID: O20051028000728
Entity NameLoyola Medical Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376041954
PECOS PAC ID: 6305109547
Enrollment ID: O20180420002063

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. Janet Marie Nielsen 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
Janet Marie Nielsen, MD
1160 E Ogden Ave Ste 106,
Naperville, IL 60563-2693

Ph: (331) 226-0315		Janet Marie Nielsen, MD
1160 E Ogden Ave Ste 106,
Naperville, IL 60563-2693

Ph: (331) 226-0315

Reviews and Comments


Family Medicine Doctors in Naperville, IL

Cortney Cole, MD
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Practice Location: 801 S Washington St, Naperville, IL 60540
Phone: 630-527-3000    
Michael E Peters, MD
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Practice Location: 3360 Lacrosse Ln, Suite 106, Naperville, IL 60564
Phone: 630-696-4404    Fax: 630-696-4405
Dr. Francis Antony, MD
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Practice Location: 1220 Hobson Road, Ste 104, Naperville, IL 60540
Phone: 630-416-1950    Fax: 630-646-5610
Dr. Molly M D'costa, D.O.
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Practice Location: 2710 111th Street, Naperville, IL 60565
Phone: 630-355-9531    Fax: 630-355-9532
Dr. Terry May, D.O.
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Practice Location: 1891 Bayscott Circle, Ste 109, Naperville, IL 60540
Phone: 630-527-6400    
Dr. Brian J Lenahan, D.O.
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Medicare: Accepting Medicare Assignments
Practice Location: 4003 S Route 59, Naperville, IL 60564
Phone: 888-693-6437    
Dr. Barbara Jean Opalka, D.O.
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 2940 Rollingridge Rd, Suite 101, Naperville, IL 60564
Phone: 630-637-8630    Fax: 630-637-8640

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.