NPI age
20 years
Enumerated 2005-08-22
● Active
Type 1 · Individual
Sean Eric McMillan, M.D.
McMillan is 1 of 4 internal medicine providers in Twin Falls and 1 of 38 in Idaho.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
UT, ID
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-07-24
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 38 active internal medicine providers in Idaho.
NPI age
20 years
≈ at median (19 yr)
State licenses
2 states
Top 60% — 39% of peers are multi-state
Subspecialties
0
44% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-08Enumerated in NPPES
2005
2026
Where they practice
Practice location
801 Pole Line Rd W Ste 381
Twin Falls, ID 833015810
Mailing address
190 E Bannock St
Boise, ID 837126241
Additional practice locations
1 secondary location on file with NPPES.
Location 2
154 Myrtle Ave, Suite 204
Murray, UT 841074833
Specialties
-
Internal Medicine PrimaryAn internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and "collagen" diseases.
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
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