**R12 — Ukushisa kwesifuba (Heartburn)** kuchaza umuzwa wokushisa esifubeni, ikakhulukazi ngemuva kwethambo lesifuba (retrosternal), ovame ukwenzeka ngemva kokudla noma uma ulele phansi. Yisizathu esikhulu sesifo sokuphindela komsoco wesisu umphimbo (gastro-oesophageal reflux disease, GERD) kodwa kungenzeka ngaphandle kwe-GERD eqinisekisiwe.
Uma kutholakala isifo, amakhodi ashintshela ku-K21.0 (GERD ene-esophagitis) noma K21.9 (GERD engena-esophagitis).
Ingaphansi kwe-**Chapter R** — Izimpawu nezibonakaliso.
