One measure shown per center — the one with reportable case volume. Every center reports on a different mix, which is why the full grid below is worth reading.

Center	Colonoscopy nat 9.9	Orthopedic nat 2.4	Urology nat 5.4	General surgery nat 1	Transfer rate	Rating	Recommend	Surveys
KEMP SURGERY CENTER	8.2 As expected	2.2 As expected	—	0.9 As expected	0.047	94	95	252
EDMONDS CENTER FOR OUTPATIENT SURGERY	—	2.4 As expected	—	1 As expected	0.234	96	92	305
Optum - Edmonds Surgery Center	—	2.5 As expected	5.3 As expected	1.1 As expected	0.028	96	95	357
PEACEHEALTH SQUALICUM SURGERY CENTER	—	2.6 As expected	—	—	0.09	94	93	371
EVERETT ORTHOPEDIC SURGERY CENTER	—	2.5 As expected	—	—	0	97	97	235
VIRGINIA MASON MEDICAL CENTER	10.3 As expected	—	—	—	0.065	95	94	451
CENTER OUTPATIENT SPINE & JOINT REPLACEMENT SURGER	—	2.5 As expected	—	—	0.049	95	95	265
Helen Holm Pumphrey Surgery Center	—	—	—	—	0.152	96	94	340
GATEWAY SURGERY CENTER	—	2.5 As expected	—	—	0.193	94	93	239
THE HARMAN EYE CLINIC	—	—	—	—	0	93	90	35
ENDOSCOPY CENTER	10 As expected	—	—	—	—	94	93	352
GH EDMONDS ENDOSCOPY CENTER SUB LLC	9.2 As expected	—	—	—	—	93	92	123
CASCADE VALLEY ARLINGTON SURGERY CENTER	9.8 As expected	—	—	—	—	94	94	265
PHYSICIANS EYE SURGERY CENTER	—	—	—	—	—	96	95	122
SOUND SURGEONS SURGERY CENTER	—	—	—	—	—	—	—	—

Rates are per-100 risk-standardized 7-day hospital visits; "nat" is the national rate for that measure. Rating and Recommend are OAS CAHPS linear mean scores (0–100). A dash means CMS did not report a value — usually too few cases, which is not a bad score.

Sources: CMS Provider of Services file (iQIES, 2026 Q2) for the facility list, specialties and room counts; CMS ASCQR facility-level quality measures; CMS OAS CAHPS patient survey. Metro grouping is by CBSA code 21794; the area name is the U.S. Census Bureau's own title for it, not one we invented.