Dr. Sean Eric McMillan, MD
- Medicare services, 2024
- 766
- Medicare patients, 2024
- 219
- Part D claims, 2024
- 2,659
- MIPS score, 2024
- 90
- Hospital affiliations
- 5
- Practice address
- 801 Pole Line Road West, Twin Falls, ID 83301
- Practice phone
- Call (208) 814-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McMillan's professional email, personal email and mobile number
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Dr. Sean Eric McMillan is a rheumatologist in Twin Falls, Idaho
Dr. McMillan practices at St. Luke's Magic Valley Medical Center in Twin Falls, Idaho, part of St. Luke's Health System.
Dr. McMillan's NPI, 1558353821, was assigned on August 22, 2005. Dr. McMillan graduated from University of Florida College of Medicine in 1999. Dr. McMillan holds Utah license 5891032-1205.
- NPI
- 1558353821NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799790747
- NPI enumeration date
- August 22, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (208) 814-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 53
- Medical school graduation
- 1999
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sean Eric McMillan practices at St. Luke's Magic Valley Medical Center in Twin Falls, Idaho
Dr. McMillan's primary practice is St. Luke's Magic Valley Medical Center, at 801 Pole Line Road West, Twin Falls, ID 83301 in Twin Falls County. The practice phone is (208) 814-1000.
- St. Luke's Magic Valley Medical Center801 Pole Line Road West, Twin Falls, ID 83301 · Twin Falls CountyPhone(208) 814-1000
Source: Dmand AI Affiliation Data
Dr. Sean Eric McMillan is affiliated with 5 sites of care and 2 medical groups
Dr. McMillan's primary practice is St. Luke's Magic Valley Medical Center in Twin Falls, Idaho, part of St. Luke's Health System. Dr. McMillan is also affiliated with St. Luke's Boise Medical Center. The medical group on file is St. Luke's Clinic, Magic Valley/Jerome. Dmand AI also links Dr. McMillan to 3 more hospitals and 1 medical group, 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. Sean Eric McMillan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McMillan practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Luke's Magic Valley Medical Center | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Sean Eric McMillan is one of 26 rheumatologists in Idaho
Rheumatology is Dr. McMillan's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. McMillan is licensed in Utah.
Specialties and state licenses
- Rheumatology, UtahPrimary
Rheumatologists near Dr. McMillan
Counts of rheumatologists 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. Sean Eric McMillan billed Medicare for 766 services in 2024
CMS data shows 766 Medicare services from Dr. McMillan across 3 procedure codes in 2024, for 219 Medicare patients. Medicare paid $31,997 for them. Every service was in an office.
Dr. McMillan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4802024: 41414%
- Other services
- 2023: 02024: 352
Dr. McMillan compared with the Idaho median for rheumatologists, 2024
- Dr. McMillan
- Idaho median
- Medicare services
- 766vs 3802.0 times
- Medicare patients
- 219vs 13760% above
- Part D claims
- 2,461vs 1,0122.4 times
Medians across 23 rheumatologists in Idaho with Dmand AI profiles that report each measure.
Dr. McMillan'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Sean Eric McMillan treated 219 Medicare patients in 2024, average age 71
CMS counts 219 Medicare patients who saw Dr. McMillan in 2024. The largest group is 65 to 74, with 109 patients. 75% of them have arthritis, and 74% have high blood pressure. 13% are also on Medicaid. Their average risk score is 1.72, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. McMillan's median patient age at 64, with 73% women.
Dr. McMillan's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. McMillan's Medicare patients by sex, 2024
- Women14968%
- Men7032%
Chronic conditions among Dr. McMillan's Medicare patients, 2024
- Arthritis75%
- High blood pressure74%
- High cholesterol59%
- Mood disorders39%
- Depression38%
- Osteoporosis33%
- Chronic kidney disease25%
- Asthma23%
Share of Medicare patients with each condition. A patient can have several.
Dr. McMillan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women73%
- Men26%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Sean Eric McMillan wrote 2,659 Medicare Part D claims in 2024
In 2024, Dr. McMillan wrote 2,659 Medicare Part D claims for 288 patients. 86% of them were for generic drugs. CMS names the drug for 2,461 of them, across 39 drugs with 11 or more claims each, at $1,741,997 in total drug cost. In 2023, CMS named 2,547 claims across 38 drugs.
Dr. McMillan's Part D claims by kind of drug, 2024
- Generic2,292 claims86%
- Brand-name and other367 claims14%
Dr. McMillan'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. McMillan's Part D claims, 2024
- Opioids6%169 of 2,659 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,5472024: 2,4613%
Drugs named by CMS: 39 in 2024, 38 in 2023.
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. Sean Eric McMillan scored 90 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. McMillan for performance year 2024, reported as part of a group. Dr. McMillan accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. McMillan's MIPS scores, performance year 2024
- 90of 100Final score
- 91.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 74of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Sean Eric McMillan received $9,102 in industry payments from 2016 to 2025
CMS Open Payments shows 44 general payments to Dr. McMillan from 15 drug and device companies from 2016 to 2025. Travel and lodging make up the largest share, 80% of the total. Liberty Surgical Inc. paid the most, $5,910.
General payments to Dr. McMillan by program year, 2016 to 2025
General payments to Dr. McMillan by kind, 2016 to 2025
- Travel and lodging$7,27880%
- Food and beverage$1,82420%
Companies that paid Dr. McMillan the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Sean Eric McMillan graduated from University of Florida College of Medicine
Dr. McMillan graduated from University of Florida College of Medicine in 1999.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Sean Eric McMillan'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) |
| 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. Sean Eric McMillan
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. Sean Eric McMillan's NPI number?
Dr. Sean Eric McMillan's NPI number is 1558353821. It was assigned on August 22, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Sean Eric McMillan?
Dr. Sean Eric McMillan is a rheumatologist in Twin Falls, Idaho. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Sean Eric McMillan practice?
Dr. McMillan practices at 801 Pole Line Road West, Twin Falls, ID 83301. Dr. McMillan's primary practice is St. Luke's Magic Valley Medical Center in Twin Falls, Idaho, part of St. Luke's Health System. Dmand AI also links Dr. McMillan to 3 hospitals and 1 medical group.
What is Dr. Sean Eric McMillan's office phone number?
The practice phone on file for Dr. McMillan is (208) 814-1000.
What is Dr. Sean Eric McMillan's medical license number?
Dr. McMillan holds Utah license 5891032-1205.
Which hospitals is Dr. Sean Eric McMillan affiliated with?
Dr. McMillan practices at St. Luke's Magic Valley Medical Center in Twin Falls, Idaho. Dr. McMillan is also affiliated with St. Luke's Boise Medical Center. Dmand AI links Dr. McMillan to 3 more hospitals.
What medical group is Dr. Sean Eric McMillan part of?
Dr. McMillan is linked to St. Luke's Clinic, Magic Valley/Jerome. Dmand AI links Dr. McMillan to 1 more medical group.
Does Dr. Sean Eric McMillan accept Medicare?
Yes. CMS data shows Dr. McMillan billed Medicare for 766 services in 2024, and Dr. McMillan accepts Medicare assignment.
What is Dr. Sean Eric McMillan's MIPS score?
Dr. McMillan's MIPS final score for performance year 2024 is 90 out of 100, reported as part of a group.
How many Medicare patients does Dr. Sean Eric McMillan see?
CMS counts 219 Medicare patients who saw Dr. McMillan in 2024, with an average age of 71.
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What services does Dr. Sean Eric McMillan bill to Medicare?
In 2024, Dr. McMillan's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99215).
Where did Dr. Sean Eric McMillan go to medical school?
Dr. McMillan graduated from University of Florida College of Medicine in 1999.
What drugs does Dr. Sean Eric McMillan prescribe most?
In 2024 Medicare Part D data, Dr. McMillan's most prescribed drugs by claims were Hydroxychloroquine Sulfate, Methotrexate and Leflunomide.
Has Dr. Sean Eric McMillan received payments from drug or device companies?
CMS Open Payments shows $9,102 in general payments to Dr. McMillan from 15 companies from 2016 to 2025. The largest total came from Liberty Surgical Inc.
How long has Dr. Sean Eric McMillan been practicing?
Dr. McMillan graduated from medical school in 1999, 27 years ago.
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