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Internal Medicine Providers in Glen Ellyn, IL

Browse 18 Internal Medicine providers listed in NPPES with a practice address in Glen Ellyn, Illinois.

18 Healthcare Providers

How Glen Ellyn compares with the U.S.

Glen Ellyn has 63 clinicians in Internal Medicine per 100,000 residents, about 1.4 times the U.S. rate of 44.

That is 18 active clinicians in Internal Medicine with a practice address in Glen Ellyn, for a population of 28,390.

The Illinois rate is 57 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

100% of clinicians in Internal Medicine in Glen Ellyn listed in the CMS Medicare file (12 of 12) accept Medicare assignment. That is similar to the Illinois share of 96%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

100% of clinicians in Internal Medicine in Glen Ellyn listed in the CMS Medicare file (12 of 12) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Illinois share of 35%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine practitioners in Glen Ellyn, IL

Source: CMS PECOS
PECOS Enrolled Specialists 12 In Glen Ellyn, IL
Part B Lab & Imaging Eligible 12 Diagnostic Referrals
DME Ordering Eligible 12 Durable Medical Equipment
Home Health Agency Referrals 12 HHA Ordering Eligible
Showing 1โ€“18 of 18 providers
With recent CMS data first, then Aโ€“Z

Dr. John Stephen Baird , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
885 Roosevelt Rd, Glen Ellyn, IL 601376141
Phone: 6303846330
NPI Identifier 1851555619
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Dr. Norman Matthew Decker , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1336534650
View Full Profile

Dr. Jonathan C. Delew , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, Ste 310, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1629060710
View Full Profile

Dr. Adelbert C Duvel , MD

Internal Medicine

Active NPI Status
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1275508772
View Full Profile

Dr. Mohit Gupta , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 60137
Phone: 6307901792
NPI Identifier 1881074441
View Full Profile

Dr. Rita Joanne Herzing , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1316103559
View Full Profile

Dr. Magdalena Anastazja Hope , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1114246782
View Full Profile

Dr. Christina Tram Huynh , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1144584988
View Full Profile

Dr. Mary Eileen Kungl , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, 310, Glen Ellyn, IL 601374418
Phone: 6304699200
NPI Identifier 1437215076
View Full Profile

Dr. Ashruta J Patel , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave Ste 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1164451696
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Dr. Leena T Patel , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1114242302
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Dr. Jeffrey Tomaszewski , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1831150036
View Full Profile

Dr. Kelly Vuong , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
885 Roosevelt Rd Ste 201, Glen Ellyn, IL 601376141
Phone: 6305453760
NPI Identifier 1073511135
View Full Profile

Dr. Caroline Wolfe , MD

Internal Medicine

Active NPI Status
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1063473031
View Full Profile

Dr. Walter Briney , MD

Internal Medicine

Active NPI Status
430 Pennsylvania Ave, 310, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1659365955
View Full Profile

Dr. Stephen R Gawne , MD

Internal Medicine

Active NPI Status
885 Roosevelt Rd, Suite 201, Glen Ellyn, IL 601376141
Phone: 6303846330
NPI Identifier 1497729537
View Full Profile

Dr. Thomas E. Marshall , MD

Internal Medicine

Active NPI Status
430 Pennsylvania Ave, Ste 310, Glen Ellyn, IL 601374464
Phone: 6307901792
NPI Identifier 1043202054
View Full Profile

Dr. Carol Olmstead Miecznikowski , MD

Internal Medicine

Active NPI Status
430 Pennsylvania Ave, Glen Ellyn, IL 601374464
Phone: 6304699200
NPI Identifier 1467429456
View Full Profile

Frequently Asked Questions about Internal Medicine in Glen Ellyn

How do I check a Internal Medicine practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Illinois licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.

Other Specialties in Glen Ellyn

Internal Medicine Providers in Other Illinois Cities

Cities with the most listed practitioners first.