Dr. Brien Rex Miller, DO
- Medicare services, 2024
- 12,126
- Medicare patients, 2024
- 778
- Part D claims, 2024
- 670
- MIPS score, 2024
- 75
- Hospital affiliations
- 2
- Practice address
- 368 East Riverside Drive, Suite B, Saint George, UT 84790
- Practice phone
- Call (435) 674-3109
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. George Endoscopy Center
Surgery Center - Medicare-Certified · Saint George, Utah
Find Dr. Miller's professional email, personal email and mobile number
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Dr. Brien Rex Miller is a gastroenterologist in Saint George, Utah
Dr. Miller practices at St. George Endoscopy Center in Saint George, Utah.
Dr. Miller's NPI, 1992066799, was assigned on June 7, 2012. Dr. Miller graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 2012. Dr. Miller holds Utah license 10707936-1204.
- NPI
- 1992066799NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456616127
- NPI enumeration date
- June 7, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (435) 674-3109
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Brien Rex Miller practices at St. George Endoscopy Center in Saint George, Utah
Dr. Miller's primary practice is St. George Endoscopy Center, at 368 East Riverside Drive, Suite B, Saint George, UT 84790. The practice phone is (435) 674-3109.
- St. George Endoscopy Center368 East Riverside Drive, Suite B, Saint George, UT 84790Phone(435) 674-3109
Source: Dmand AI Affiliation Data
Dr. Brien Rex Miller is affiliated with 4 sites of care and 1 medical group
Dr. Miller's primary practice is St. George Endoscopy Center in Saint George, Utah. Dr. Miller is also affiliated with St. George Regional Hospital. The medical group on file is Utah Gastroenterology. Dmand AI also links Dr. Miller to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Brien Rex Miller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Miller practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. George Endoscopy Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Brien Rex Miller is one of 132 gastroenterologists in Utah
Gastroenterology is Dr. Miller's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Miller is licensed in Utah.
Specialties and state licenses
- Gastroenterology, UtahPrimary
Gastroenterologists near Dr. Miller
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Brien Rex Miller billed Medicare for 12,126 services in 2024
CMS data shows 12,126 Medicare services from Dr. Miller across 20 procedure codes in 2024, for 778 Medicare patients. Medicare paid $295,253 for them.
Dr. Miller's Medicare services by type, 2024
- Drugs given in the office10,970
- Surgery869
- Tests and treatments152
- Other services90
- Office and hospital visits45
Where Dr. Miller's Medicare services took place, 2024
- In an office11,09491%
- In a facility1,0329%
Dr. Miller compared with the Utah median for gastroenterologists, 2024
- Dr. Miller
- Utah median
- Medicare services
- 12,126vs 30340.0 times
- Medicare patients
- 778vs 2253.5 times
- Part D claims
- 528vs 2492.1 times
Medians across 134 gastroenterologists in Utah with Dmand AI profiles that report each measure.
Dr. Miller's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Miller and other gastroenterologists in Utah.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Brien Rex Miller treated 778 Medicare patients in 2024, average age 73
CMS counts 778 Medicare patients who saw Dr. Miller in 2024. The largest group is 65 to 74, with 418 patients. 71% of them have high blood pressure, and 71% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.16, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Miller's median patient age at 67, with 54% women.
Dr. Miller's Medicare patients by age, 2024
Dr. Miller's Medicare patients by sex, 2024
- Women40852%
- Men37048%
Chronic conditions among Dr. Miller's Medicare patients, 2024
- High blood pressure71%
- High cholesterol71%
- Arthritis50%
- Diabetes26%
- Mood disorders26%
- Depression25%
- Ischemic heart disease24%
- Chronic kidney disease22%
Share of Medicare patients with each condition. A patient can have several.
Dr. Miller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Brien Rex Miller wrote 670 Medicare Part D claims in 2024
In 2024, Dr. Miller wrote 670 Medicare Part D claims for 264 patients. 91% of them were for generic drugs. CMS names the drug for 528 of them, across 9 drugs with 11 or more claims each, at $17,423 in total drug cost.
Dr. Miller's Part D claims by kind of drug, 2024
- Generic612 claims91%
- Brand-name58 claims9%
Dr. Miller's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Miller's Part D claims, 2024
- Antibiotics3%22 of 670 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Brien Rex Miller scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Miller for performance year 2024, reported as part of a group. Dr. Miller accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 430 procedures of colonoscopy by Dr. Miller, more than 99% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Miller's MIPS scores, performance year 2024
- 75of 100Final score
- 47.1of 100Quality
- 95of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Miller ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 98th percentile480 procedures
- Colonoscopy
- 99th percentile430 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Brien Rex Miller received $1,926 in industry payments from 2024 to 2025
CMS Open Payments shows 107 general payments to Dr. Miller from 19 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 95% of the total. Abbvie Inc. paid the most, $594.
General payments to Dr. Miller by program year, 2024 to 2025
General payments to Dr. Miller by kind, 2024 to 2025
- Food and beverage$1,83795%
- Education$895%
Companies that paid Dr. Miller the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Brien Rex Miller graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville
Dr. Miller graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Brien Rex Miller's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Brien Rex Miller
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Brien Rex Miller's NPI number?
Dr. Brien Rex Miller's NPI number is 1992066799. It was assigned on June 7, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Brien Rex Miller?
Dr. Brien Rex Miller is a gastroenterologist in Saint George, Utah. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Brien Rex Miller practice?
Dr. Miller practices at 368 East Riverside Drive, Suite B, Saint George, UT 84790. Dr. Miller's primary practice is St. George Endoscopy Center in Saint George, Utah. Dmand AI also links Dr. Miller to 1 hospital and 1 group practice or clinic.
What is Dr. Brien Rex Miller's office phone number?
The practice phone on file for Dr. Miller is (435) 674-3109.
What is Dr. Brien Rex Miller's medical license number?
Dr. Miller holds Utah license 10707936-1204.
Which hospitals is Dr. Brien Rex Miller affiliated with?
Dr. Miller is affiliated with St. George Regional Hospital. Dmand AI links Dr. Miller to 1 more hospital.
What medical group is Dr. Brien Rex Miller part of?
Dr. Miller is linked to Utah Gastroenterology.
Does Dr. Brien Rex Miller accept Medicare?
Yes. CMS data shows Dr. Miller billed Medicare for 12,126 services in 2024, and Dr. Miller accepts Medicare assignment.
What is Dr. Brien Rex Miller's MIPS score?
Dr. Miller's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. Brien Rex Miller see?
CMS counts 778 Medicare patients who saw Dr. Miller in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Brien Rex Miller bill to Medicare?
In 2024, Dr. Miller's most billed Medicare services were injected or infused drug (J3380), injected or infused drug (J1745) and surgery: digestive system (45385).
Where did Dr. Brien Rex Miller go to medical school?
Dr. Miller graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 2012.
What drugs does Dr. Brien Rex Miller prescribe most?
In 2024 Medicare Part D data, Dr. Miller's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Sucralfate.
Has Dr. Brien Rex Miller received payments from drug or device companies?
CMS Open Payments shows $1,926 in general payments to Dr. Miller from 19 companies from 2024 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Brien Rex Miller been practicing?
Dr. Miller graduated from medical school in 2012, 14 years ago.
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