JANET MARIE NIELSEN M.D.
NPI 1679773980
Family Medicine in Naperville, IL

Q: What is Janet Nielsen's NPI number?

The NPI number for Janet Nielsen is 1679773980. It was assigned to this individual provider in the NPPES registry on July 24, 2007.

Q: What is Janet Nielsen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Janet Nielsen was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 24, 2007PECOS Enrolled

1160 E OGDEN AVE STE 106, NAPERVILLE, IL 60563(331) 226-0315(844) 689-2582 Get Directions Write a Review

NPPES record last updated: September 2, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 2, 2025, Jan 7, 2022, Jun 22, 2021 (3 updates tracked since 2021).

On this page

About Janet Marie Nielsen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JANET MARIE NIELSEN M.D. (NPI 1679773980) is an individual family medicine provider in Naperville, Illinois, licensed in Illinois (036.127246) and active in the NPI registry since July 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in Melrose Park.

NPPES Registry Identity

NPI1679773980

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameJANET MARIE NIELSENCredential: M.D.

Location Address1160 E OGDEN AVE STE 106Naperville, IL 60563-2693

Mailing Address1160 E Ogden Ave Ste 106Naperville, IL 60563-2693 · (331) 226-0315 · Fax (844) 689-2582

Phone(331) 226-0315

Fax(844) 689-2582

Sole ProprietorNo

Enumeration DateJuly 24, 2007

Last NPPES UpdateSeptember 2, 20253 updates tracked since enumeration

NPPES CertifiedSeptember 2, 2025

✔ NPI 1679773980 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in IL · 036.127246

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

1160 E OGDEN AVE STE 106, Naperville, IL 60563

Open in Google Maps ↗

Secondary Practice Location 1

Location 1701 W North AveMelrose Park, IL 60160-1612 · Phone (708) 681-3200

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Janet Marie Nielsen M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Janet Nielsen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Dupage Medical Group Ltd

6.3 mi

Multi-Specialty

1100 W 31ST ST, STE 300
Downers Grove, IL 60515

Reassigned Medicare billing, Illinois enrollment
1,061 clinicians in this Medicare group

NPI 1801833983 (630) 469-9200

Loyola University Medical Center

16 mi

General Practice

2160 S 1ST AVE
Maywood, IL 60153

Reassigned Medicare billing, Illinois enrollment
1,138 clinicians in this Medicare group

NPI 1336159961 (708) 216-3215

Gottlieb Memorial Hospital

17 mi

General Acute Care Hospital

701 W NORTH AVE
Melrose Park, IL 60160

Reassigned Medicare billing, Illinois enrollment
3 clinicians in this Medicare group

NPI 1831170232 (708) 681-3200

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

148 services140 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

57 services57 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

54 services53 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

42 services42 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60563 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$93.02 typical visit price

range $59.81 – $181.38

Typical copayment $23.25 (range $14.95 – $45.34)

Most-billed visit code 99203

Established Patient

$105.07 typical visit price

range $19.15 – $147.12

Typical copayment $26.26 (range $4.78 – $36.78)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KYLEE J LADD PA

Physician Assistant

1160 E OGDEN AVE STE 106
NAPERVILLE, IL 60563

Dupage County (331) 226-0315

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Janet Nielsen's NPI number?

The NPI number for Janet Nielsen is 1679773980. It was assigned to this individual provider in the NPPES registry on July 24, 2007.

Where is Janet Nielsen located?

Janet Nielsen practices at 1160 E Ogden Ave Ste 106, Naperville, IL 60563. The listed phone number is (331) 226-0315.

What is Janet Nielsen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Janet Nielsen enrolled in Medicare?

Yes. Janet Nielsen is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Janet Nielsen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Janet Nielsen reassigns Medicare benefits to 3 organizations: Dupage Medical Group Ltd (Downers Grove, IL), Loyola University Medical Center (Maywood, IL) and Gottlieb Memorial Hospital (Melrose Park, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Janet Nielsen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Janet Nielsen was last updated on September 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.