K52.2Allergic and dietetic gastroenteritis and colitis

K52.2 is the ICD-10-CM diagnosis code for allergic and dietetic gastroenteritis and colitis. It belongs to category K52 (other and unspecified noninfective gastroenteritis and colitis), block K50-K52 (noninfective enteritis and colitis) and chapter 11 (diseases of the digestive system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within K52 (other and unspecified noninfective gastroenteritis and colitis), K52.2 is specifically for allergic and dietetic gastroenteritis and colitis. Related codes cover gastroenteritis and colitis due to radiation (K52.0), toxic gastroenteritis and colitis (K52.1), indeterminate colitis (K52.3), other specified noninfective gastroenteritis and colitis (K52.8) and noninfective gastroenteritis and colitis, unspecified (K52.9).

To report this condition, pick the subcode that matches the documentation: K52.21 (syndrome), K52.22 (enteropathy) and K52.29 (colitis).

The conditions in its Excludes2 note aren't part of K52.2, but may be coded alongside it if the patient has both: allergic eosinophilic colitis (K52.82), allergic eosinophilic esophagitis (K20.0), allergic eosinophilic gastritis (K52.81) and allergic eosinophilic gastroenteritis (K52.81).

Use an additional code to identify type of food allergy (Z91.01-, Z91.02-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2017 (expanded into subcodes).