**R51 — Ikhanda elibuhlungu** yikhodi yesimpthomi engachazeki kahle esetshenziswa lapho imbangela eyisisekelo ingakaqinisekiswa. Ibhekisela ebuhlungwini kunoma iyiphi ingxenye yekhanda, okuhlanganisa ikhanda elibuhlungu lohlobo lokucindezeleka, elesibili, noma elingahlukanisiwe.
Odokotela bakhetha R51 ezindaweni zokunakekelwa kokuqala kanye nezimo eziphuthumayo ngaphambi kokuba kutholakale ukuxilongwa okuqinisekile (isib. i-migraine [G43], ikhanda elibuhlungu le-cluster [G44.0], noma ikhanda elibuhlungu elihlobene ne-sinusitis [J01]).
Ingaphansi kwe-**Chapter R** — Izimpawu, izibonakaliso kanye nemiphumela engajwayelekile yokuhlolwa komzimba neyaselebhu, esetshenziswa lapho kungekho khodi yokuxilonga ecacile enokusetshenziswa.
