ICD-10-CM > K00-K95 > K50-K52 > K52 > K52.2 K52.2 Allergic and dietetic gastroenteritis and colitis Non-Billable/Non-Specific Applicable To Food hypersensitivity gastroenteritis or colitis Use Additional code to identify type of food allergy (Z91.01-, Z91.02-) Type 2 Excludes allergic eosinophilic colitis (K52.82)allergic eosinophilic esophagitis (K20.0)allergic eosinophilic gastritis (K52.81)allergic eosinophilic gastroenteritis (K52.81) Codes K52.21Food protein-induced enterocolitis syndromeK52.22Food protein-induced enteropathyK52.29Other allergic and dietetic gastroenteritis and colitis