| H.H.S. | Health and Human Services |
|---|---|
| H.L. | Hearing level |
| H.p. | H. pylori |
| h.p.l.c.-e.c.d. | High performance liquid chromatography with electrochemical detection |
| H.P.T. | Hypothalamic-pituitary-thyroid |
| H.R.T. | Histamine release test |
| H.U.V. | Human Umbilical Vein |
| H.V.S. | Hyperventilation Syndrome |
| H/L | Heterophil/lymphocyte |
| H/N | head and neck |