Other and unspecified noninfective gastroenteritis and colitis (K52) ICD-10-CM
The K52 code range covers other and unspecified noninfective gastroenteritis and colitis with 18 ICD-10-CM diagnosis codes. 14 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Codes in the K52 Range 18 codes · 14 billable
- K52 Other and unspecified noninfective gastroenteritis and colitisNon-billable
- K52.0 Gastroenteritis and colitis due to radiation
- K52.1 Toxic gastroenteritis and colitis
- K52.2 Allergic and dietetic gastroenteritis and colitisNon-billable
- K52.21 Food protein-induced enterocolitis syndrome
- K52.22 Food protein-induced enteropathy
- K52.29 Other allergic and dietetic gastroenteritis and colitis
- K52.3 Indeterminate colitis
- K52.8 Other specified noninfective gastroenteritis and colitisNon-billable
- K52.81 Eosinophilic gastritis or gastroenteritis
- K52.82 Eosinophilic colitis
- K52.83 Microscopic colitisNon-billable
- K52.831 Collagenous colitis
- K52.832 Lymphocytic colitis
- K52.838 Other microscopic colitis
- K52.839 Microscopic colitis, unspecified
- K52.89 Other specified noninfective gastroenteritis and colitis
- K52.9 Noninfective gastroenteritis and colitis, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the K52 range.
Colitis, Collagenous
A subtype of MICROSCOPIC COLITIS, characterized by chronic watery DIARRHEA of unknown origin, a normal COLONOSCOPY but abnormal histopathology on BIOPSY. Microscopic examination of biopsy samples taken from the COLON show larger-than-normal band of subepithelial COLLAGEN.
Colitis, Lymphocytic
A subtype of MICROSCOPIC COLITIS, characterized by chronic watery DIARRHEA of unknown origin, a normal COLONOSCOPY but abnormal histopathology on BIOPSY. Microscopic examination of biopsy samples taken from the COLON show infiltration of LYMPHOCYTES in the superficial EPITHELIUM and the underlying connective tissue (lamina propria).
Colitis, Microscopic
A condition characterized by chronic watery DIARRHEA of unknown origin, a normal COLONOSCOPY but abnormal histopathology on BIOPSY. This syndrome was first described in 1980 by Read and associates. Subtypes include COLLAGENOUS COLITIS and LYMPHOCYTIC COLITIS. Both have similar clinical symptoms and are distinguishable only by histology.
Eosinophilic Colitis
Inflammation of the colon that is characterized by eosinic infiltration.
About the K52 Code Range
These conditions involve the stomach and intestines or the colon without infection. They include conditions linked to radiation, toxins, allergies, or diet.
The subdivisions separate radiation-related conditions (K52.0) from toxic conditions (K52.1) and allergic or dietetic conditions (K52.2). The allergic and dietetic branch distinguishes food protein-induced enterocolitis syndrome, food protein-induced enteropathy, and other forms.
Indeterminate colitis has its own subdivision (K52.3). Other specified conditions (K52.8) distinguish eosinophilic gastritis or gastroenteritis, eosinophilic colitis, and microscopic colitis. Microscopic colitis (K52.83) splits into collagenous, lymphocytic, other, and unspecified forms. K52.9 covers unspecified noninfective gastroenteritis and colitis.
Questions About This Page
How many billable codes are in the K52 range?
Of the 18 codes in this range, 14 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the K52 range classify?
The range classifies other and unspecified noninfective gastroenteritis and colitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
