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Internal Medicine - Gastroenterology Specialists in Springfield, OR

Browse 21 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Springfield, Oregon.

21 Healthcare Providers

How Springfield compares with the U.S.

Springfield has 34 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 5.5 times the U.S. rate of 6.2.

That is 21 active clinicians in Internal Medicine - Gastroenterology with a practice address in Springfield, for a population of 61,499.

The Oregon rate is 6.6 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 Springfield listed in the CMS Medicare file (15 of 15) accept Medicare assignment. That is similar to the Oregon share of 98%.

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.

73% of clinicians in Internal Medicine - Gastroenterology in Springfield listed in the CMS Medicare file (11 of 15) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Oregon share of 60%.

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 Springfield, OR

Source: CMS PECOS
PECOS Enrolled Specialists 15 In Springfield, OR
Part B Lab & Imaging Eligible 15 Diagnostic Referrals
DME Ordering Eligible 15 Durable Medical Equipment
Home Health Agency Referrals 15 HHA Ordering Eligible
Showing 1โ€“20 of 21 providers
With recent CMS data first, then Aโ€“Z

Dr. Ryan J De Lee , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1104920693
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Dr. Erica Donnan , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1396087912
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Dr. Paul E Evans , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
3377 Riverbend Dr, Springfield, OR 974778800
Phone: 5412226200
NPI Identifier 1962480871
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Dr. Jonathan Gonenne , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1649299538
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Dr. Peter Grubel , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
3377 Riverbend Dr, Springfield, OR 974778803
Phone: 5412226389
NPI Identifier 1376531335
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Dr. Nathan Holman , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1386082386
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Dr. Peter S Kay , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1710906177
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Dr. Gregory L Knecht , MD

Internal Medicine - Gastroenterology

Active NPI Status
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1598785578
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Dr. Terrence C Lee , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1083977607
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Dr. Shane J Mills , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1699747055
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Dr. Jubeen Moaven , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr Ste 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1346401445
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Dr. Harry H Park , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
960 N 16th St Ste 200, Springfield, OR 974774175
Phone: 5412283330
NPI Identifier 1467430959
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Dr. Khola Qamar , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1460 G St, Springfield, OR 974774112
Phone: 5413452205
NPI Identifier 1083974299
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Dr. Davis L Sim , MD PHD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr 500, Springfield, OR 97477
Phone: 5418689506
NPI Identifier 1265668263
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Dr. Abhinav Tiwari , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3377 Riverbend Dr, Springfield, OR 974778803
Phone: 5412226200
NPI Identifier 1225411598
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Dr. William C Wu , MD

Internal Medicine - Gastroenterology

Active NPI Status
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1992724819
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Dr. Donald K Yang , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1023037306
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Dr. Craig E Chamberlain , MD

Internal Medicine - Gastroenterology

Active NPI Status
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1598784928
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Dr. Christianne D Kratka , MD

Internal Medicine - Gastroenterology

Active NPI Status
3355 Riverbend Dr, Suite 500, Springfield, OR 974778800
Phone: 5418689500
NPI Identifier 1851310130
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Dr. M. Andrew Mirhej , MD

Internal Medicine - Gastroenterology

Active NPI Status
3377 Riverbend Dr, Springfield, OR 974778800
Phone: 5412226200
NPI Identifier 1548237910
View Full Profile

Frequently Asked Questions about Internal Medicine - Gastroenterology in Springfield

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 Oregon 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.