Best Hospitals in Boise, ID, Graded A–F
All 4 graded Medicare-certified hospitals in Boise, ID, scored from CMS Care Compare — overall rating, mortality, safety of care and readmissions — against Idaho hospitals of the same type. Grades are computed, never edited, and every input is shown on the hospital page.
CMS data as of Sep 2026 · graded Sep 11, 2026Grade distribution — Boise, ID
A1
B1
C1
D1
F0
Highest graded
Boise · CMS overall rating 5 of 5 — top quarter...See grade
4 hospitalsgraded in Boise, ID · 1 earned an A
All Idaho
Idaho Falls (3)Nampa (2)Blackfoot (1)Burley (1)Caldwell (1)Coeur D'alene (1)Kellogg (1)Ketchum (1)Lewiston (1)
Highest in Boise, ID 1
St Luke's Regional Medical Center - Boise, ID · Acute care hospital · voluntary non-profit - private CMS Care Compare · data as of Sep 2026
- CMS overall rating 5 of 5 — top quarter among Idaho acute care hospitals
- Mortality: 1 measure better than the national rate, 1 worse, of 8
- Safety: 2 measures better than the national rate, 0 worse, of 8
AScore 79 · ExcellentSee Full Grade
(208) 381-2222
Boise, ADA County
Emergency dept.
Birthing-Friendly
2
Boise Va Medical Center - Boise, ID · Acute care hospital · veterans health administration CMS Care Compare · data as of Sep 2026
- CMS overall rating 5 of 5 — top quarter among Idaho acute care hospitals
- Mortality: 1 measure better than the national rate, 0 worse, of 4
- Safety: 0 measures better than the national rate, 0 worse, of 4
BScore 67 · GoodSee Full Grade
(208) 422-1000
Boise, ADA County
Emergency dept.
3
Saint Alphonsus Regional Medical Center - Boise, ID · Acute care hospital · voluntary non-profit - church CMS Care Compare · data as of Sep 2026
- CMS overall rating 3 of 5 — bottom quarter among Idaho acute care hospitals
- Mortality: 0 measures better than the national rate, 1 worse, of 8
- Safety: 2 measures better than the national rate, 0 worse, of 7
CScore 49 · AverageSee Full Grade
(208) 367-2121
Boise, ADA County
Emergency dept.
Birthing-Friendly
4
Treasure Valley Hospital - Boise, ID · Acute care hospital · proprietary CMS Care Compare · data as of Sep 2026
- Mortality: 0 measures better than the national rate, 0 worse, of 1
- Safety: 0 measures better than the national rate, 0 worse, of 1
- Readmission: 1 measure better than the national rate, 0 worse, of 2
DScore 40 · Below averageSee Full Grade
(208) 373-5000
Boise, ADA County
Idaho hospitals by city
How we grade hospitals
What data goes into a grade?
CMS Care Compare Hospital General Information: CMS overall rating (25), Mortality (25), Safety of care (25), Readmission (25). Each metric is percentile-ranked against Idaho hospitals of the same type; A ≥ 72, B ≥ 58, C ≥ 42, D ≥ 28, F below. Hospitals with fewer than three of the four metrics are shown as "Not graded".
Why is a well-known hospital graded C?
The grade measures outcomes CMS reports — death rates, complications, infections, readmissions — not reputation, research or specialist rankings. A large teaching hospital that treats the sickest patients can score average on these measures. Use the grade as one input, alongside the specialists you need.
Can a hospital pay to improve its grade?
No. Grades are computed from public data and have no editable field. Nothing on this page is sponsored.