In simple words: This code signifies the presence of painful ulcers and inflammation in the mouth lining as a side effect of medication.

Oral mucositis (ulcerative) due to other drugs. Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).

Example 1: A patient undergoing chemotherapy for cancer develops painful ulcers in their mouth., A patient taking certain antibiotics experiences inflammation and sores in their oral cavity., A patient receiving targeted therapy for an autoimmune disorder develops oral mucositis.

Detailed clinical documentation of the oral lesions, including location, size, and appearance; Medication history including names, dosages, and duration of therapy; Evidence linking the mucositis to the specific medication.

** Excludes2: certain conditions originating in the perinatal period (P04-P96) certain infectious and parasitic diseases (A00-B99) complications of pregnancy, childbirth and the puerperium (O00-O9A) congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) endocrine, nutritional and metabolic diseases (E00-E88) injury, poisoning and certain other consequences of external causes (S00-T88) neoplasms (C00-D49) symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)