ICD-10-CM > K00-K95 > K50-K52 > K52 > K52.8 K52.8 Other specified noninfective gastroenteritis and colitis Non-Billable/Non-Specific Codes K52.81Eosinophilic gastritis or gastroenteritisK52.82Eosinophilic colitisK52.83Microscopic colitisK52.831Collagenous colitisK52.832Lymphocytic colitisK52.838Other microscopic colitisK52.839Microscopic colitis, unspecifiedK52.89Other specified noninfective gastroenteritis and colitis