| #241 | Nagoya Journal of Medical Science. -- Nagoya : Nagoya University School of Medicine, 1927-. -- ISSN 0027-7622 |
| #242 | Nagoya Medical Journal. -- Nagoya : Nagoya City University. Medical School Kawasumi, 1953-. -- ISSN 0027-7649 |
| #243 | National Library of Medicine current catalog. -- Bethesda : National Library of Medicine, 1966-1987. -- ISSN 0090-3132 |
| #244 | Nature medicine. -- New York : Nature America, 1995-. -- ISSN 1078-8956 print. -- ISSN 1546-170X online |
| #245 | The Netherlands journal of medicine. -- Amsterdam : Elsevier, 1973-. -- ISSN 0300-2977 |
| #246 | The New England journal of medicine. -- Boston : New England Journal of Medicine, 1928-. -- ISSN 0028-4793 print. -- ISSN 1533-4406 online |
| #247 | New EU Magazine of Medicine. -- Praha : Medical Press, 2006-. -- ISSN 1802-1298 |
| #248 | New Zealand medical journal. -- Wellington : New Zealand Medical Journal, 1887-2002. -- ISSN 0028-8446 |
| #249 | Nordisk medicin. -- Stockholm : Nordisk Medicin, 1939-. -- ISSN 0029-1420 |
| #250 | La Nouvelle presse médicale. -- Paris : Masson, 1972-1982. -- ISSN 0301-1518 |