JANET M. SIEL MD
NPI 1093873366
Internal Medicine in Glenview, IL

Q: What is Janet Siel's NPI number?

The NPI number for Janet Siel is 1093873366. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Q: What is Janet Siel's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Janet Siel was last updated on October 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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 December 05, 2006PECOS Enrolled

2050 PFINGSTEN RD, SUITE 330, GLENVIEW, IL 60026(847) 998-4100(847) 998-4135 Get Directions Write a Review

NPPES record last updated: October 6, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Janet M. Siel Md NPPES

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

JANET M. SIEL MD (NPI 1093873366) is an individual internal medicine provider in Glenview, Illinois, licensed in Illinois (036-079033) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1093873366

Entity TypeIndividualFemale

Primary Taxonomy207R00000X

Provider Legal NameJANET M. SIELCredential: MD

Location Address2050 PFINGSTEN RD, SUITE 330Glenview, IL 60026-1324

Mailing Address2650 Ridge Ave, Evanston HospitalEvanston, IL 60201-1718 · (847) 570-1206 · Fax (847) 570-1248

Phone(847) 998-4100

Fax(847) 998-4135

Sole ProprietorNo

Enumeration DateDecember 5, 2006

Last NPPES UpdateOctober 6, 2020

NPPES CertifiedOctober 6, 2020

✔ NPI 1093873366 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IL · 036-079033

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

2050 PFINGSTEN RD, Glenview, IL 60026

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Janet M. Siel Md 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 Reassignment

Medicare enrollment records show Janet Siel reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Endeavor Health Medical Group

8.9 mi

Allergy & Immunology

1000 CENTRAL ST
Evanston, IL 60201

Reassigned Medicare billing, Illinois enrollment
4,841 clinicians in this Medicare group

NPI 1497701882 (847) 570-5235

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60026 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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.

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

1 supplier12 claims12 services$200.12 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

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

ENDEAVOR HEALTH CLINICAL OPERATIONS

Pharmacy

2050 PFINGSTEN RD, MEDICAL OFFICE BUILDING SOUTH - SUITE 100
GLENVIEW, IL 60026

Cook County (847) 657-1785

KHALDOUN DALBIK M.D.

Family Medicine

2050 PFINGSTEN RD
GLENVIEW, IL 60026

Cook County (847) 657-1810

DR. EZECHINYEREM D UZOSIKE M.D.

Family Medicine

2050 PFINGSTEN RD, SUITE 200
GLENVIEW, IL 60026

Cook County (847) 657-1840

LAURIE A CASAS MD

Surgery (Plastic and Reconstructive Surgery)

2050 PFINGSTEN RD, SUITE 270
GLENVIEW, IL 60026

Cook County (847) 657-5884

RACHAEL LIBERTIN MD

Pediatrics

2050 PFINGSTEN RD
GLENVIEW, IL 60026

Cook County (847) 657-1812

KSENIA OLEXANDRA HANKEWYCH PHARM.D.

Pharmacist

2050 PFINGSTEN RD
GLENVIEW, IL 60026

Cook County (847) 832-6180

RACHEL U LEE PHARM.D.

Pharmacist

2050 PFINGSTEN RD
GLENVIEW, IL 60026

Cook County (847) 657-1785

ALAN B. FRYDMAN MD

Internal Medicine

2050 PFINGSTEN RD, SUITE 330
GLENVIEW, IL 60026

Cook County (847) 998-4100

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 Siel's NPI number?

The NPI number for Janet Siel is 1093873366. It was assigned to this individual provider in the NPPES registry on December 5, 2006.

Where is Janet Siel located?

Janet Siel practices at 2050 Pfingsten Rd Suite 330, Glenview, IL 60026. The listed phone number is (847) 998-4100.

What is Janet Siel's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Janet Siel enrolled in Medicare?

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

Which organization bills Medicare for Janet Siel's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Janet Siel reassigns Medicare benefits to Endeavor Health Medical Group (Evanston, IL). The 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 Siel'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 Siel was last updated on October 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years 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.