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Internal Medicine - Gastroenterology Specialists in Naperville, IL

Browse 23 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Naperville, Illinois.

23 Healthcare Providers

How Naperville compares with the U.S.

Naperville has 15 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 2.5 times the U.S. rate of 6.2.

That is 23 active clinicians in Internal Medicine - Gastroenterology with a practice address in Naperville, for a population of 150,692.

The Illinois rate is 7.0 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 - Gastroenterology in Naperville listed in the CMS Medicare file (19 of 19) 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.

37% of clinicians in Internal Medicine - Gastroenterology in Naperville listed in the CMS Medicare file (7 of 19) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is similar to the Illinois share of 41%.

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 - Gastroenterology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Gastroenterology practitioners in Naperville, IL

Source: CMS PECOS
PECOS Enrolled Specialists 19 In Naperville, IL
Part B Lab & Imaging Eligible 19 Diagnostic Referrals
DME Ordering Eligible 20 Durable Medical Equipment
Home Health Agency Referrals 19 HHA Ordering Eligible
Showing 1โ€“20 of 23 providers
With recent CMS data first, then Aโ€“Z

Dr. James Abraham , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr Ste 208, Naperville, IL 605406552
Phone: 6307172600
NPI Identifier 1427276732
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Dr. Rafi Mohammed Ali , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr, Ste. 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1437136454
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Dr. Scott A Berger , MD

Internal Medicine - Gastroenterology

Active NPI Status
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1366483455
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Dr. Abhishek Bhandari , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1243 Rickert Dr, Naperville, IL 60540
Phone: 6305276450
NPI Identifier 1194092031
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Dr. Sidharth Bhandari , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1871941435
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Dr. Navdeep Singh Chehl , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr Ste 300, Naperville, IL 605406553
Phone: 6307172600
NPI Identifier 1730475534
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Dr. Thomas Peter Couri , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1619357639
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Dr. Jacob Victor Dibattista , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1992263347
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Dr. Marc Fallah , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr, Ste 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1750356804
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Dr. Sushama Gundlapalli , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1568401529
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Dr. Luis Hernandez , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr Ste 300, Naperville, IL 605406553
Phone: 6307172600
NPI Identifier 1508426685
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Dr. Donald Charles Hoscheit , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr Ste 208, Naperville, IL 605406552
Phone: 6307172600
NPI Identifier 1316913809
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Dr. Dinesh Jain , MD

Internal Medicine - Gastroenterology

Active NPI Status
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1003857103
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Dr. Darren A Kastin , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1243 Rickert Dr, Naperville, IL 605400954
Phone: 6305276450
NPI Identifier 1164402244
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Dr. Kashyap N Katwala , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr, Ste 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1194791194
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Dr. Adam Klugman , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr, Ste 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1588630669
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Dr. George E Morgan , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr Ste 208, Naperville, IL 605406552
Phone: 6307172600
NPI Identifier 1649387051
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Dr. William A. Mourad , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr, Ste 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1760698161
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Dr. Harold Mozwecz , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
100 Spalding Dr, Ste 208, Naperville, IL 605406550
Phone: 6307172600
NPI Identifier 1356318349
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Dr. Jamie Marie Oleaga , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
100 Spalding Dr Ste 208, Naperville, IL 60540
Phone: 6307172600
NPI Identifier 1265878813
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Frequently Asked Questions about Internal Medicine - Gastroenterology in Naperville

How do I check a Internal Medicine - Gastroenterology 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.