Brien Rex Miller, D.O.
Gastroenterology Physician · St George, UT
Brien Rex Miller, D.O. is a gastroenterology physician with a practice address in St George, Utah, and NPI 1992066799, issued on Jun 7, 2012. Check the license (Utah 10707936-1204, as entered in NPPES) on the Utah Medical Licensing Board; the Medicare figures below come from public CMS files.
- Name
- Brien Rex Miller
- Credential
- D.O.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 10707936-1204 UT
Self-reported in NPPES; status is on the state search - Practice location
- 368 E Riverside Dr Ste A, St George, UT 84790
- Phone
- (435) 673-1149
- Enumerated
- Jun 7, 2012
- Record last updated
- Dec 5, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (435) 673-1182
- Medicare enrollment
- Enrolled (PECOS I20180530000552); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 2012
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 149 in Utah → Look up another NPI →
Also registered at 368 E Riverside Dr Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tyson Amundsen, MDGastroenterology Physician1013573054
- Scott Diamond, DOGastroenterology Physician1730684432
- Louis DuranteMedical Physician Assistant1720798812
- George Jeung, D.O.Gastroenterology Physician1275982464
- Camryn Jones, DNP, FNPFamily Nurse Practitioner1447064886
- Phillip Oberg, DOGastroenterology Physician1780174557
Verify Brien Rex Miller in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersUtah Medical Licensing Board
Search for license 10707936-1204Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average gastroenterology physician in 2024
670 Medicare Part D claims for 264 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Omeprazole195 claims
- Pantoprazole Sodium153 claims
- Sucralfate84 claims
- Spironolactone20 claims
- Azathioprine18 claims
- Ursodiol18 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $706.73
44 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Utah Gastroenterology LLCSt George, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brien Rex Miller among 149 gastroenterology physician records in Utah
Brien Rex Miller, D.O. is one of 149 gastroenterology physician records with a practice address in Utah. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 74% of them.
- NPI issued2012 · 74% of these records are older, 26% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2012 · median 2004 among the 103 with a school on file
- Record last updated2019 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Utah practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Utah
There are 149 gastroenterology physician records in Utah.
All 149 in Utah → Every provider in St George → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Tyson Amundsen, MDSt George, UT 847901013573054
- James Bown, M.D.St George, UT 847901629081260
- Scott Diamond, DOSt George, UT 847901730684432
- Christopher Flannery, MDSt George, UT 847901538396411
- Edward Frech, MDSt George, UT 847901942496757
- Allan Gunnerson, D.O.St George, UT 847901407081524
- Megan Hubbard, DOSt George, UT 847901538671383
- George Jeung, D.O.St George, UT 847901275982464
Common questions
What is Brien Rex Miller, D.O.'s NPI number?
Brien Rex Miller, D.O.'s National Provider Identifier (NPI) is 1992066799, issued on Jun 7, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Brien Rex Miller, D.O. located?
The NPPES record lists a practice address at 368 E Riverside Dr Ste A, St George, UT, 84790. Phone: (435) 673-1149. Providers update this record themselves, so call before visiting.
How can I verify Brien Rex Miller, D.O.'s license?
NPPES lists Utah license number 10707936-1204, as entered by the provider. Search the Utah Medical Licensing Board at https://secure.utah.gov/llv/search/index.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brien Rex Miller, D.O. prescribe under Medicare Part D?
In 2024, Brien Rex Miller, D.O. had 670 Medicare Part D claims for 264 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Brien Rex Miller, D.O.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.