66 hospitals, health systems warned about pixel tracking

The recipients of the letters were warned that their websites may be using these tracking tools. Here are 66 hospitals and health systems that received those letters:

1. Advocate Aurora Health (Milwaukee and Downers Grove, Ill.)
2. Ascension (St. Louis)
3. Barnes-Jewish Hospital (St. Louis)
4. Barton Health (South Lake Tahoe, Calif.)
5. Beaumont Health System (Southfield, Mich.)
6. Bellin Health (Green Bay, Wis.)
7. Bon Secours Mercy Health (Cincinnati)
8. Brigham and Women’s Faulkner Hospital (Boston)
9. Cedars-Sinai Medical Center (Los Angeles)
10. Chesapeake (Va.) Regional Healthcare
11. Children’s Wisconsin (Milwaukee)
12. Cone Health (Greensboro, N.C.)
13. Covenant Health (Knoxville, Tenn.)
14. Duke University Health System (Durham, N.C.)
15. El Camino Hospital (Mountain View, Calif.)
16. Froedtert Hospital (Milwaukee)
17. Grady Health System (Atlanta)
18. Henry Ford Hospital (Detroit)
19. Houston Methodist 
20. Inova Health System (Falls Church, Va.)
21. Johns Hopkins (Baltimore)
22. LCMC Health System (New Orleans)
23. Loyola Medicine (Maywood, Ill.)
24. Marshall Medical Center (Placerville, Calif.)
25. MedStar Health (Columbia, Md.)
26. Memorial Healthcare System (Fort Lauderdale, Fla.)
27. MemorialCare Long Beach Medical Center (Fountain Valley, Calif.)
28. Mercy Medical Center (Baltimore)
29. Middlesex Health (Middletown, Conn.)
30. MultiCare Health System (Tacoma, Wash.)
31. Nemours Children’s Health (North Jacksonville, Fla.)
32. NewYork-Presbyterian Hospital (New York City)
33. Northwestern Medicine Central DuPage Hospital (Winfield, Ill.) 
34. Northwestern Memorial Healthcare (Chicago)
35. Penn Medicine Chester County (West Chester, Pa.)
36. Penn Medicine (Philadelphia)
37. Piedmont Healthcare (Atlanta)
38. Renown Health (Reno, Nev.)
39. Riverside Health System (Newport News, Va.)
40. Rochester Regional Health (South Rochester, N.Y.)
41. Rush University Medical Center (Chicago)
42. Salem (Ore.) Health
43. Sanford USD Medical Center (Sioux Falls, S.D.)
44. Sarasota (Fla.) Memorial Health Care System
45. Scripps Memorial Hospital La Jolla (San Diego)
46. Sharp Healthcare (San Diego)
47. Sparrow Health System (Lansing, Mich.)
48. St. Joseph Mercy Health System (Ypsilanti, Mich.)
49. St. Luke’s Health System (Boise, Idaho)
50. St. Tammany Health System (Madisonville, La.)
51. Tampa (Fla.) General Hospital 
52. Thomas Jefferson Hospital (Philadelphia)
53. Tufts Medical Center (Boston)
54. UC Davis Health (Sacramento, Calif.)
55. UCLA Reagan Medical Center (Oakland, Calif.)
56. UnityPoint Health (West Des Moines, Iowa)
57. University Hospitals Cleveland Medical Center
58. University of Chicago Medicine 
59. University of Iowa Hospitals and Clinics (Iowa City)
60. University of Kansas Health System (Kansas City)
61. University of Pittsburgh Medical Center 
62. University of Texas Southwestern Medical Center (Dallas)
63. University of Vermont Health Network (Middlebury)
64. Wexner Medical Center (Columbus, Ohio)
65. Willis-Knighton Health System (Shreveport, La.)
66. Yale New Haven (Conn.) Health