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Internal Medicine - Gastroenterology Specialists in St George, UT

Browse 14 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in St George, Utah.

14 Healthcare Providers

How St George compares with the U.S.

St George has 14 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 2.2 times the U.S. rate of 6.2.

That is 14 active clinicians in Internal Medicine - Gastroenterology with a practice address in St George, for a population of 101,995.

The Utah rate is 4.4 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 St George listed in the CMS Medicare file (13 of 13) accept Medicare assignment. That is similar to the Utah share of 99%.

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.

31% of clinicians in Internal Medicine - Gastroenterology in St George listed in the CMS Medicare file (4 of 13) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the Utah share of 43%.

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 St George, UT

Source: CMS PECOS
PECOS Enrolled Specialists 14 In St George, UT
Part B Lab & Imaging Eligible 14 Diagnostic Referrals
DME Ordering Eligible 14 Durable Medical Equipment
Home Health Agency Referrals 14 HHA Ordering Eligible
Showing 1โ€“14 of 14 providers
With recent CMS data first, then Aโ€“Z

Dr. Tyson Amundsen , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
368 E Riverside Dr Ste A, St George, UT 847906897
Phone: 4356731149
NPI Identifier 1013573054
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Dr. James W Bown , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
368 E Riverside Dr, Suite A, St George, UT 847906896
Phone: 4356731149
NPI Identifier 1629081260
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Dr. Scott Diamond , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
368 E Riverside Dr Ste A, St George, UT 847906897
Phone: 4356731149
NPI Identifier 1730684432
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Dr. Christopher Michael Flannery , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1380 E Medical Center Dr Ste 4100, St George, UT 847902156
Phone: 4352512880
NPI Identifier 1538396411
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Dr. Edward J Frech , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1380 E Medical Center Dr Ste N1200, St George, UT 847902123
Phone: 8015073380
NPI Identifier 1942496757
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Dr. Allan Clark Gunnerson , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1380 E Medical Center Dr Ste 4100, St George, UT 847902156
Phone: 4352513800
NPI Identifier 1407081524
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Dr. Megan Renee Hubbard , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
1380 E Medical Center Dr Ste 4100, St George, UT 847902156
Phone: 4352512800
NPI Identifier 1538671383
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Dr. George Jeung , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
368 E Riverside Dr Ste A, St George, UT 847906897
Phone: 4356731149
NPI Identifier 1275982464
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Dr. Brien Rex Miller , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
368 E Riverside Dr Ste A, St George, UT 847906897
Phone: 4356731149
NPI Identifier 1992066799
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Dr. Phillip Oberg , DO

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
368 E Riverside Dr Ste A, St George, UT 847906897
Phone: 4356731149
NPI Identifier 1780174557
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Dr. Lloyd Edwin Perino , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
652 S Medical Center Dr, Suite 330, St George, UT 847907017
Phone: 4352513800
NPI Identifier 1215966296
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Dr. Roger L Siddoway , MD

Internal Medicine - Gastroenterology

Active NPI Status
368 E Riverside Dr, Suite A, St George, UT 847906896
Phone: 4356731149
NPI Identifier 1548240310
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Dr. Christoph T Woerlein , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
368 E Riverside Dr, St George, UT 847906896
Phone: 4356731149
NPI Identifier 1255370771
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Dr. John Erikson Yap , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1380 E Medical Center Dr Ste 4100, St George, UT 847902156
Phone: 4352513800
NPI Identifier 1184912529
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Frequently Asked Questions about Internal Medicine - Gastroenterology in St George

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 Utah 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.