| Rank | Board name and description | Posts | Members |
| 1 | Acne.org Message Boards Acne problems discussion forum | 4884996 | 96366 |
| 2 | Baby and Bump Pregnancy forum | 3505600 | 39223 |
| 3 | Allnurses.com Nurses discussion forums | 2572754 | 256964 |
| 4 | Hyster Sisters Women community for issues related to GYN diseases and complications | 2346519 | 128967 |
| 5 | She Knows Pregnancy discussion and advice message boards | 2322944 | 49498 |
| 6 | Nedug Free medical consultation forum (in russian) | 1851089 | 15124 |
| 7 | Sober Recovery Alcoholism and Addictions help forums | 1589167 | 59878 |
| 8 | Ovusoft Parenthood and pregnancy message boards | 1462059 | 14908 |
| 9 | Lap Band Talk Lap band surgery forums | 1316879 | 75359 |
| 10 | GeoParent Community focussed on family life, parenting and pregnancy | 1206128 | 11085 |
| 11 | ValueMD Medical schools forum | 1111111 | 108277 |
| 12 | SaniHelp Health message board (in Italian) | 1049100 | 48043 |
| 13 | ePharmacyWatch Forum about buying prescription drugs online and telemedicine | 801347 | 128822 |
| 14 | PASS support boards Post abortion support forums | 581038 | 9889 |
| 15 | Depression Forums Mental health forums | 549001 | 33646 |
| 16 | Braintalk Communities Online patient support groups for neurology | 389978 | 62345 |