Many of the bibliographies in Oxford Bibliographies will include a list of recommended journals.
For example, the Health Communication article points readers to Health Communication, Health Education & Behavior, Health Promotion International, Health Psychology, the Journal of Communication in Healthcare and the Journal of Health Communication: International Perspectives.
EBSCO databases will let you search the journals they publish. This link goes to Communication & Mass Media Complete, but you should see the same in any EBSCO database. Search for a topic to find journals matching that topic.