2026 ICD-10-CM Diagnosis Code K52.82Eosinophilic colitis
ICD-10-CM Codes›K00–K95›K50-K52›K52
- Billable — Valid for Submission
- Not Chronic
K52.82 is a billable ICD-10-CM diagnosis code for eosinophilic colitis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 391 through 392. Coders also document this condition as allergic proctocolitis caused by food protein. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Noninfectious gastroenteritis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Allergic proctocolitis caused by food protein
- Eosinophilic colitis
- Eosinophilic ulcerative colitis
- Gastrointestinal eosinophilia
- Proctocolitis
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- allergic proctocolitis K52.29
- food-induced eosinophilic proctocolitis K52.29
- food protein-induced enterocolitis syndrome FPIES K52.21
- food protein-induced proctocolitis K52.29
- milk protein-induced proctocolitis K52.29
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Colitis (acute) (catarrhal) (chronic) (noninfective) (hemorrhagic) - See Also: Enteritis; - K52.9
- eosinophilic - K52.82
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Colitis(acute) (catarrhal) (chronic) (noninfective) (hemorrhagic)
- eosinophilic
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Proctocolitis
inflammation of the rectum and the distal portion of the colon.Eosinophilic Colitis
inflammation of the colon that is characterized by eosinic infiltration.Proctocolitis
inflammation of the rectum and colon.
Patient EducationClinical
Eosinophilic Disorders
Eosinophils are a type of white blood cell. They help fight off infections and play a role in your body's immune response. They can also build up and cause inflammation.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K52.82 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K52.82Overview
Is K52.82 (Other specified noninfective gastroenteritis and colitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report eosinophilic colitis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K52.82 group to?
When eosinophilic colitis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 391, 392, with relative weights from 0.7796 to 1.2683 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of K52.82?
Under the General Equivalence Mappings, eosinophilic colitis converts to ICD-9-CM 558.42 (eosinophilic colitis). The mapping is a direct match.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
