| Rank | Board name and description | Posts | Members |
| 1 | Allnurses.com Nurses discussion forums | 2572754 | 256964 |
| 2 | Hyster Sisters Women community for issues related to GYN diseases and complications | 2346519 | 128967 |
| 3 | Acne.org Message Boards Acne problems discussion forum | 2187369 | 73064 |
| 4 | Nedug Free medical consultation forum (in russian) | 1851089 | 15124 |
| 5 | She Knows Pregnancy discussion and advice message boards | 1808109 | 37736 |
| 6 | Ovusoft Parenthood and pregnancy message boards | 1462059 | 14908 |
| 7 | Sober Recovery Alcoholism and Addictions help forums | 1208000 | 48467 |
| 8 | GeoParent Community focussed on family life, parenting and pregnancy | 1206128 | 11085 |
| 9 | SaniHelp Health message board (in Italian) | 945543 | 45052 |
| 10 | ePharmacyWatch Forum about buying prescription drugs online and telemedicine | 777193 | 126203 |
| 11 | PASS support boards Post abortion support forums | 581038 | 9889 |
| 12 | Braintalk Communities Online patient support groups for neurology | 293941 | 39436 |