Sean Eric McMillan, M.D.
Rheumatology Physician · Twin Falls, ID
Sean Eric McMillan, M.D. is a rheumatology physician with a practice address in Twin Falls, Idaho, and NPI 1558353821, issued on Aug 22, 2005. Check the license (Idaho 3571655, as entered in NPPES) on the Idaho Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Sean Eric McMillan
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- 3571655 ID
5891032-1205 UT
Self-reported in NPPES; status is on the state search - Practice location
- 801 Pole Line RD W Ste 381, Twin Falls, ID 83301
- Phone
- (208) 814-8150
- Enumerated
- Aug 22, 2005
- Record last updated
- Jul 24, 2025
- Fax
- (208) 732-3112
- Medicare enrollment
- Enrolled (PECOS I20060213000069); accepts Medicare assignment
- Medical or professional school
- University Of Florida College Of Medicine, 1999
- Entity
- Type 1 · individual
Verify Sean Eric McMillan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIdaho Board of Medicine
Search for license 3571655Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average rheumatology physician in 2024
2,659 Medicare Part D claims for 288 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 169 claims were for opioids.
Most prescribed
- Hydroxychloroquine Sulfate570 claims
- Methotrexate265 claims
- Leflunomide206 claims
- Prednisone193 claims
- Folic Acid99 claims
- Hydrocodone-Acetaminophen80 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 92.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $93.28
1 payment: food and beverage; the largest payer was Intuitive Surgical, Inc. The 4,486 providers of this specialty with any payment received $8,538.33 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 2 group practices
- St Lukes Clinic LLCTwin Falls, ID
- University OF Utah Adult ServicesSalt Lake City, UT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rheumatology Physician providers in Idaho
There are 31 rheumatology physician records in Idaho.
Other rheumatology physician records in Idaho
- John Ader, DO-RHEUMATOLOGYPost Falls, ID1992789564
- Desmond Anim-Appiah, MDBoise, ID1164434635
- Stephen Bienz, MDNampa, ID1851381834
- Francis Dega, MDBoise, ID1033289798
- Mary Derlacki, FNPBoise, ID1609947431
- Sarah Dill, M.D.Meridian, ID1457794075
- Achini Dingman, MDMeridian, ID1174594758
- Dustin Dinning, DOCoeur D Alene, ID1578774022
- Christopher Gibson, DOAshton, ID1922501733
- Sheena Henry, M.D.Coeur D Alene, ID1467833806
Common questions
What is Sean Eric McMillan, M.D.'s NPI number?
Sean Eric McMillan, M.D.'s National Provider Identifier (NPI) is 1558353821, issued on Aug 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Sean Eric McMillan, M.D. located?
The NPPES record lists a practice address at 801 Pole Line RD W Ste 381, Twin Falls, ID, 83301. Phone: (208) 814-8150. Providers update this record themselves, so call before visiting.
How can I verify Sean Eric McMillan, M.D.'s license?
NPPES lists Idaho license number 3571655, as entered by the provider. Search the Idaho Board of Medicine at https://dopl.idaho.gov/bom/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Sean Eric McMillan, M.D. prescribe under Medicare Part D?
In 2024, Sean Eric McMillan, M.D. had 2,659 Medicare Part D claims for 288 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Sean Eric McMillan, M.D.'s MIPS final score?
The 2023 MIPS final score is 92.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.